Bug in Zappa?

[José Carlos]

This position happened in a test game:
8/r6p/P3R3/3P4/5k2/7K/8/8 b - - 0 1
[diag]8/r6p/P3R3/3P4/5k2/7K/8/8 b - - 0 1 [/diag]
Here, Zappa played Rxa6??
If I run a fresh analisys in other computer (so no position learning or whatever), Zappa thinks:

Code: Select all

FEN: 8/r6p/P3R3/3P4/5k2/7K/8/8 b - - 0 1

Zappa 1.0:
   1   00:00             18   450   -1,95   Rf4f5
   2   00:00            153   3.825   -2,21   Rf4f3 Rh3h4
   3   00:00            330   8.250   -2,14   Rf4f3 Rh3h4 Rf3f4
   4   00:00          1.106   27.650   -1,84   Ta7d7 Te6f6+ Rf4e5 Rh3h4
   4   00:00          1.765   29.416   -1,70   Ta7d7 d5d6 Td7a7 Te6f6+ Rf4e5
   5   00:00          3.875   55.357   -1,51   Ta7d7 Te6h6 Rf4g5 Th6h4 Td7xd5 Th4xh7
   6   00:00         10.231   102.310   -1,68   Ta7d7 Rh3h4 Td7xd5 a6a7 Td5a5 Te6e7
   6   00:00         10.810   98.272   -1,68   Ta7d7 Rh3h4 Td7xd5 a6a7 Td5a5 Te6e7
   7   00:00         19.368   129.120   -1,38   Ta7d7 Rh3h4 Td7xd5 a6a7 Td5a5 Te6f6+ Rf4e4 Tf6f7
   7   00:00         21.465   134.156   -1,38   Ta7d7 Rh3h4 Td7xd5 a6a7 Td5a5 Te6f6+ Rf4e4 Tf6f7
   7   00:00         22.275   139.218   -1,38   Ta7d7 Rh3h4 Td7xd5 a6a7 Td5a5 Te6f6+ Rf4e4 Tf6f7
   8   00:00         55.381   184.603   -1,45   Ta7d7 d5d6 Td7a7 Te6e8 h7h5 Rh3g2 Ta7xa6 d6d7
   8   00:00         56.589   182.545   -1,45   Ta7d7 d5d6 Td7a7 Te6e8 h7h5 Rh3g2 Ta7xa6 d6d7
   9   00:00        154.239   213.923   -1,25   Ta7d7 Te6f6+ Rf4e5 Tf6b6 Re5xd5 Tb6b7 Td7d8 a6a7 Td8a8 Rh3g3
   9   00:00        160.888   214.231   -1,25   Ta7d7 Te6f6+ Rf4e5 Tf6b6 Re5xd5 Tb6b7 Td7d8 a6a7 Td8a8 Rh3g3
  10   00:01        470.194   252.385   -1,46   Ta7d7 Te6e8 Td7a7 d5d6 h7h6 Rh3g2 Ta7g7+ Rg2f2 Tg7a7 Te8e6 Ta7xa6 Te6xh6 Ta6a2+ Rf2g1
  10   00:02        592.729   260.769   -0,95   h7h5 Rh3h4 Ta7xa6 d5d6 Ta6a8 Rh4xh5 Rf4f5 Te6e7 Ta8d8 Te7e3
  10   00:02        757.927   266.500   -0,26   h7h5 Te6f6+ Rf4e5 Tf6b6 Re5xd5 Rh3h4 Rd5c5 Tb6e6 Rc5b5 Te6e5+ Rb5b6 Rh4g5 Ta7xa6
  10   00:03      1.029.097   265.504   +0,12   Ta7xa6 Te6e7 Ta6a3+ Rh3g2 Ta3a2+ Rg2h3 Ta2d2 Te7xh7 Td2xd5 Th7f7+ Rf4e4 Tf7e7+ Td5e5 Te7d7 Te5d5
  10   00:03      1.030.234   265.798   +0,12   Ta7xa6 Te6e7 Ta6a3+ Rh3g2 Ta3a2+ Rg2h3 Ta2d2 Te7xh7 Td2xd5 Th7f7+ Rf4e4 Tf7e7+ Td5e5 Te7d7 Te5d5
  11   00:05      1.540.366   272.727   +0,22   Ta7xa6 Te6e7 Ta6d6 Te7e4+ Rf4f5 Te4h4 h7h6 Rh3g3 Rf5e5 Th4h5+ Re5e4 Th5h4+ Re4xd5 Th4f4
  11   00:05      1.549.287   272.857   +0,22   Ta7xa6 Te6e7 Ta6d6 Te7e4+ Rf4f5 Te4h4 h7h6 Rh3g3 Rf5e5 Th4h5+ Re5e4 Th5h4+ Re4xd5 Th4f4
  12   00:10      2.896.498   284.668   +0,17   Ta7xa6 Te6e7 Ta6a3+ Rh3g2 Ta3d3 d5d6 Td3d2+ Rg2h3 Td2d3+ Rh3g2
  12   00:10      2.908.683   284.746   +0,17   Ta7xa6 Te6e7 Ta6a3+ Rh3g2 Ta3d3 d5d6 Td3d2+ Rg2h3 Td2d3+ Rh3g2
  13   00:22      6.934.944   302.268   +0,07   Ta7xa6 Te6e7 Ta6a3+ Rh3g2 h7h5 Te7e4+ Rf4f5 Te4e5+ Rf5g6 Te5e6+ Rg6f7 Te6h6 Rf7e7 Rg2f2 Ta3d3 Th6h7+ Re7d6 Th7xh5 Rd6c5 Th5h7 Td3xd5
  13   00:23      7.011.228   302.038   +0,07   Ta7xa6 Te6e7 Ta6a3+ Rh3g2 h7h5 Te7e4+ Rf4f5 Te4e5+ Rf5g6 Te5e6+ Rg6f7 Te6h6 Rf7e7 Rg2f2 Ta3d3 Th6h7+ Re7d6 Th7xh5 Rd6c5 Th5h7 Td3xd5


Note that the 'T' stands for Torre (Rook).
Hope this helps, Anthony.

[Anthony Cozzie]

logfile?

anthony

[Gábor Szots]

logfile?

anthony

I repeated Jos?'s position under the following circumstances:

- P3 under Win2k
- Zappa installed under Arena as a UCI engine

The rest can be seen from this logfile:

set_option(): tbcache = 4194304 (4M)
tablebase_setcache(): allocated 4096kb of memory.
set_option(): tbpath = D:\Sakk\TB
tablebase_init(): searching for EGTBs at path "D:\Sakk\TB"
tablebase_init(): found EGTBs with up to 4 pieces.
tablebase_init(): EGTB indices & decompression using 1527kb of memory
set_option(): hash = 33554432 (32M)
hash_reallocate(): Allocated transposition table: 32M
set_option(): phash = 8388608 (8M)
set_option(): threads = 1
game_start_thread(0): spawning worker thread!
set_option(): scorepov = 1
set_option(): kibitz = 3
set_option(): book = public.zbook
hash_reallocate(): Allocated pawn hash table: 8M
hash_reallocate(): Allocated king hash table: 8M
worker_cpu(): CPU0 starting.
set_option(): tbcache = 4
tablebase_setcache(): allocated 0kb of memory.
set_option(): hash = 50331648 (48M)
hash_reallocate(): trimming bytes to power of two (48M -> 32M)
hash_reallocate(): Allocated transposition table: 32M
set_option: unknown option Resign_Score
- - - - - - - -
r - - - - - - p
P - - - R - - -
- - - P - - - -
- - - - - k - -
- - - - - - - K
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:BLACK EP:0
MB: 100 WPC: 1 BPC: 1 HM:0 HKL:4AB1FE6E HKH:41CB3C07

Book Lookup failed (0 entries / 472 bytes / 20 ms)

1... Kf4-f5
= (-1.95) Depth: 1/3 00:00:00.08 0kN (0 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4
= (-2.21) Depth: 2/5 00:00:00.18 0kN (1 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Kf3-f4
= (-2.14) Depth: 3/8 00:00:00.18 0kN (2 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.84) Depth: 4/9 00:00:00.19 1kN (6 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-f6 Kf4-e5
= (-1.70) Depth: 4/9 00:00:00.20 1kN (9 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-h6 Kf4-g5 3. Rh6-h4 Rd7xd5 4. Rh4xh7
= (-1.51) Depth: 5/10 00:00:00.22 3kN (18 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.26 10kN (39 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.26 10kN (41 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.38) Depth: 7/14 00:00:00.32 19kN (60 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.34 21kN (63 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.34 22kN (65 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.54 55kN (102 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.54 56kN (105 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:01.07 154kN (144 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:01.11 160kN (145 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7xa6 7. Re6xh6 Kf4-e5 8. d6-d7
= (-1.46) Depth: 10/20 00:00:02.31 396kN (172 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7-d7
= (-1.46) Depth: 10/20 00:00:02.56 442kN (173 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7 Ra5-a2 5. Re7-f7 Kf4-e5 6. Kh4-h5 Ke5-e6 7. Rf7-c7
= (-1.22) Depth: 11/21 00:00:04.22 796kN (189 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7 Ra5-a2 5. Re7-f7 Kf4-e5 6. Kh4-h5 Ke5-e6 7. Rf7-c7
= (-1.22) Depth: 11/21 00:00:04.34 819kN (189 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Kf4-f5 6. Re8-c8 Ra7xa6 7. d6-d7
= (-1.22) Depth: 12/21 00:00:06.55 1313kN (201 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Kf4-f5 6. Re8-c8 Ra7xa6 7. d6-d7
= (-1.22) Depth: 12/21 00:00:06.74 1354kN (201 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Ra7-d7 6. Re8-e7 Rd7xd6 7. a6-a7 Rd6-a6
= (-1.68) Depth: 13/24 00:00:10.73 2185kN (204 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Ra7-d7 3. Re6-e8 Kf3-f4 4. Re8-b8 Kf4-e5 5. Rb8-b7 Rd7-d8 6. a6-a7 Rd8-a8 7. Rb7-d7 h7-h6
= (-1.67) Depth: 13/24 00:00:13.07 2692kN (206 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Ra7-d7 3. Re6-e8 Kf3-f4 4. Re8-b8 Kf4-e5 5. Rb8-b7 Rd7-d8 6. a6-a7 Rd8-a8 7. Rb7-d7 h7-h6
= (-1.67) Depth: 13/25 00:00:21.25 4451kN (209 KN/s, 0 splits, 0 aborts)
1 ...Kf4-f3!
+ (-1.37) Depth: 14/25 00:00:28.60 5936kN (208 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h2 Kf3-f4 3. Kh2-g2 Ra7-d7 4. d5-d6 Rd7-a7 5. Re6-e8 h7-h5 6. Kg2-f2 Kf4-f5 7. Kf2-e3 Ra7xa6 8. d6-d7
= (-1.30) Depth: 14/25 00:00:34.00 7036kN (207 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h2 Kf3-f4 3. Kh2-g2 Ra7-d7 4. d5-d6 Rd7-a7 5. Re6-e8 h7-h5 6. Kg2-f2 Kf4-f5 7. Kf2-e3 Ra7xa6 8. d6-d7
= (-1.30) Depth: 14/25 00:00:36.05 7462kN (207 KN/s, 0 splits, 0 aborts)

Count: Time: 45446ms, Nodes: 9630424 Qnodes: 6340446[65.8%][19.0%], NPS: 212K
Hash: TProbes: 9621144[99.9%] TPings: 6641100[69.0%] THits: 3814791[39.7%]
EHash: KHits 1993620[71.7%] PHits 781855[99.6%] POverall: 2775475[99.9%]
Exts: Check: 188829 Singular: 0 Mate: 0 One-rep: 0
TB: Probes:92 Hits: 92[100.0%]
Idle: CPU0: 0

game_stop_thread(): stopping CPU0
worker_cpu(): CPU0 exiting.

You can see that Zappa did not make the mistake Jos? described (at least not up to depth 14). I think comparing this with the logfile Jos? provides may reveal the problem.

[Gábor Szots]

Note that in the end EGTB cache is set to 0 as John Brownlee explained it in the CCC forum.

[José Carlos]

Sorry for not posting the log. I thought you would reproduce it.
Athlon MP 2400
Windows XP
3-4 Complete EGTB's
5 Uncomplete EGTB's

Code: Select all

set_option(): tbpath = c:\ajedrez\tb
tablebase_init(): searching for EGTBs at path "c:\ajedrez\tb"
tablebase_init(): found EGTBs with up to 5 pieces.
tablebase_init(): EGTB indices & decompression using 16583kb of memory
set_option(): phash = 8388608 (8M)
hash_reallocate(): Allocated transposition table: 64M
set_option(): threads = 1
game_start_thread(0): spawning worker thread!
set_option(): scorepov = 1
set_option(): book = public.zbook
hash_reallocate(): Allocated pawn hash table: 8M
hash_reallocate(): Allocated king hash table: 8M
worker_cpu(): CPU0 starting.
set_option(): tbpath = C:\ajedrez\TB
tablebase_init(): searching for EGTBs at path "C:\ajedrez\TB"
tablebase_init(): found EGTBs with up to 5 pieces.
tablebase_init(): EGTB indices & decompression using 16583kb of memory
set_option(): tbcache = 4
tablebase_setcache(): allocated 0kb of memory.
- - - - - - - -
r - - - - - - p
P - - - R - - -
- - - P - - - -
- - - - - k - -
- - - - - - - K
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:BLACK EP:0
MB:   100 WPC: 1 BPC: 1 HM:1 HKL:4AB1FE6E HKH:41CB3C07

Book Lookup failed (0 entries / 472 bytes / 0 ms)

1... Kf4-f5
 = (-1.95)   Depth: 1/3   00:00:00.00   0kN (1 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4
 = (-2.21)   Depth: 2/5   00:00:00.00   0kN (1 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Kf3-f4
 = (-2.14)   Depth: 3/8   00:00:00.00   0kN (1 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
 + (-1.84)   Depth: 4/9   00:00:00.01   1kN (69 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-f6 Kf4-e5
 = (-1.70)   Depth: 4/9   00:00:00.01   1kN (110 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-h6 Kf4-g5 3. Rh6-h4 Rd7xd5 4. Rh4xh7
 = (-1.51)   Depth: 5/10   00:00:00.01   3kN (242 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
 = (-1.68)   Depth: 6/12   00:00:00.03   10kN (330 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
 = (-1.68)   Depth: 6/12   00:00:00.03   10kN (349 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
 + (-1.38)   Depth: 7/14   00:00:00.06   19kN (307 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
 = (-1.38)   Depth: 7/14   00:00:00.06   21kN (341 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
 = (-1.38)   Depth: 7/14   00:00:00.06   22kN (353 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
 = (-1.45)   Depth: 8/16   00:00:00.15   55kN (355 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
 = (-1.45)   Depth: 8/16   00:00:00.15   56kN (363 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
 = (-1.25)   Depth: 9/18   00:00:00.39   154kN (394 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
 = (-1.25)   Depth: 9/18   00:00:00.40   160kN (396 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-e8 Rd7-a7 3. d5-d6 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7xa6 7. Re6xh6 Ra6-a2 8. Kf2-g1
 = (-1.46)   Depth: 10/20   00:00:01.09   469kN (429 KN/s, 0 splits, 0 aborts)
1 ...h7-h5!
 + (-0.95)   Depth: 10/20   00:00:01.34   592kN (441 KN/s, 0 splits, 0 aborts)
1... h7-h5 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Kh3-h4 Kd5-c5 5. Rb6-e6 Kc5-b5 6. Re6-e5 Kb5-b6 7. Kh4-g5 Ra7xa6
 = (-0.26)   Depth: 10/20   00:00:01.70   757kN (445 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-a2 4. Kg2-h3 Ra2-d2 5. Re7xh7 Rd2xd5 6. Rh7-f7 Kf4-e4 7. Rf7-e7 Rd5-e5 8. Re7-d7 Re5-d5
 = (0.12)   Depth: 10/20   00:00:02.32   1028kN (442 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-a2 4. Kg2-h3 Ra2-d2 5. Re7xh7 Rd2xd5 6. Rh7-f7 Kf4-e4 7. Rf7-e7 Rd5-e5 8. Re7-d7 Re5-d5
 = (0.12)   Depth: 10/20   00:00:02.32   1029kN (442 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-d6 3. Re7-e4 Kf4-f5 4. Re4-h4 h7-h6 5. Kh3-g3 Kf5-e5 6. Rh4-h5 Ke5-e4 7. Rh5-h4 Ke4xd5 8. Rh4-f4
 = (0.22)   Depth: 11/21   00:00:03.42   1540kN (450 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-d6 3. Re7-e4 Kf4-f5 4. Re4-h4 h7-h6 5. Kh3-g3 Kf5-e5 6. Rh4-h5 Ke5-e4 7. Rh5-h4 Ke4xd5 8. Rh4-f4
 = (0.22)   Depth: 11/21   00:00:03.43   1548kN (451 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-d3 4. d5-d6 Rd3-d2 5. Kg2-h3 Rd2-d3 6. Kh3-g2
 = (0.17)   Depth: 12/25   00:00:06.17   2896kN (469 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-d3 4. d5-d6 Rd3-d2 5. Kg2-h3 Rd2-d3 6. Kh3-g2
 = (0.17)   Depth: 12/25   00:00:06.20   2908kN (469 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 h7-h5 4. Re7-e4 Kf4-f5 5. Re4-e5 Kf5-g6 6. Re5-e6 Kg6-f7 7. Re6-h6 Kf7-e7 8. Kg2-f2 Ra3-d3 9. Rh6-h7 Ke7-d6 10. Rh7xh5 Kd6-c5 11. Rh5-h7 Rd3xd5
 = (0.07)   Depth: 13/26   00:00:14.17   6934kN (489 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 h7-h5 4. Re7-e4 Kf4-f5 5. Re4-e5 Kf5-g6 6. Re5-e6 Kg6-f7 7. Re6-h6 Kf7-e7 8. Kg2-f2 Ra3-d3 9. Rh6-h7 Ke7-d6 10. Rh7xh5 Kd6-c5 11. Rh5-h7 Rd3xd5
 = (0.07)   Depth: 13/26   00:00:14.32   7010kN (489 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-d3 4. Re7-e4 Kf4-f5 5. Re4-f4 Kf5-e5 6. Rf4-f5 Ke5-d6 7. Rf5-h5 Rd3-a3 8. Rh5-h6 Kd6-e5 9. Rh6xh7 Ke5xd5 10. Rh7-e7 Ra3-d3 11. Re7-d7 Kd5-e4 12. Rd7xd3 Ke4-f5
 = (0.07)   Depth: 14/28   00:00:31.68   16017kN (505 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-d3 4. Re7-e4 Kf4-f5 5. Re4-f4 Kf5-e5 6. Rf4-f5 Ke5-d6 7. Rf5-h5 Rd3-a3 8. Rh5-h6 Kd6-e5 9. Rh6xh7 Ke5xd5 10. Rh7-e7 Ra3-d3 11. Re7-d7 Kd5-e4 12. Rd7xd3 Ke4-f5
 = (0.07)   Depth: 14/28   00:00:32.03   16201kN (506 KN/s, 0 splits, 0 aborts)

Count: Time: 34313ms, Nodes: 17402454 Qnodes: 11382406[65.4%][18.3%], NPS: 507K
Hash:  TProbes: 17418901[100.1%] TPings: 12377384[71.1%] THits: 7137316[41.0%]
EHash: KHits 3451032[70.8%] PHits 1421044[99.9%] POverall: 4872076[100.0%]
Exts:  Check: 481451 Singular: 0 Mate: 0 One-rep: 0
TB:    Probes:2947 Hits: 2946[100.0%]
Idle:  CPU0: 0

game_stop_thread(): stopping CPU0
worker_cpu(): CPU0 exiting.


[José Carlos]

I forgot to say that I used UCI protocol with default options.

[Gábor Szots]

I forgot to say that I used UCI protocol with default options.

Jos?, I have the feeling that incomplete 5-man TB's can be the reason. What if you repeat your experiment without them?

[MartinB]

Hi,

I encountered a very similar problem and it seems that it is related to the size of the EGTB cache, since with any other cache sizes than 8M the problem will appear.

In the following position

[diag]8/2R2nk1/6p1/5rNp/8/4K3/8/8 w - - 6 70[/diag]
8/2R2nk1/6p1/5rNp/8/4K3/8/8 w - - 6 70

Zappa 1.0 played 70.Ng5xf7 with a score of +0,10. It can be reproduced in analysis mode.

Code: Select all

FEN: 8/2R2nk1/6p1/5rNp/8/4K3/8/8 w - - 6 70

Zappa 1.0:
1 00:00 64 0 -1,74 70.Sg5e4
2 00:00 406 0 -2,25 70.Sg5e6+ Kg7h6 71.Se6f4
3 00:00 1.624 162.400 -2,19 70.Sg5e4 Kg7h6 71.Tc7c6
4 00:00 3.911 195.550 -2,48 70.Sg5e6+ Kg7f6 71.Se6d4 Tf5e5+ 72.Ke3f3 h5h4
5 00:00 9.672 161.200 -2,37 70.Sg5e4 Kg7h6 71.Tc7c8 Tf5f1 72.Tc8c6
6 00:00 14.467 158.978 -2,49 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1
6 00:00 23.299 165.241 -2,49 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1
7 00:00 33.934 140.804 -2,52 70.Sg5e4 Kg7h6 71.Tc7c8 Sf7g5 72.Se4d6 Tf5f3+ 73.Ke3e2 Tf3f4 74.Tc8h8+ Kh6g7
7 00:00 63.465 180.811 -2,52 70.Sg5e4 Kg7h6 71.Tc7c8 Sf7g5 72.Se4d6 Tf5f3+ 73.Ke3e2 Tf3f4 74.Tc8h8+ Kh6g7
8 00:00 94.824 205.691 -2,50 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1 73.Se4g3 Tf1g1
8 00:00 130.644 228.798 -2,50 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1 73.Se4g3 Tf1g1
9 00:00 158.487 236.195 -2,51 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3d4 Te5g5 73.Sg3e4 Tg5f5 74.Kd4e3 h5h4 75.Ke3d4
9 00:01 243.181 258.153 -2,51 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3d4 Te5g5 73.Sg3e4 Tg5f5 74.Kd4e3 h5h4 75.Ke3d4
10 00:02 563.138 271.653 -2,79 70.Sg5e4 g6g5 71.Se4g3 Tf5e5+ 72.Ke3f3 h5h4 73.Sg3e4 Te5f5+ 74.Kf3g2 Kg7g6 75.Tc7c6+ Kg6h5 76.Kg2h3
10 00:02 568.992 273.159 -2,21 70.Tc7xf7+ Tf5xf7 71.Sg5xf7 h5h4 72.Sf7d8 g6g5
10 00:02 570.409 272.531 -0,71 70.Tc7xf7+ Tf5xf7 71.Sg5xf7 h5h4 72.Sf7d8 g6g5
10 00:02 580.198 272.010 +0,08 70.Tc7xf7+ Tf5xf7 71.Sg5xf7 Kg7f6 72.Sf7d6 g6g5 73.Ke3f3 Kf6e6 74.Sd6e4 Ke6f5 75.Se4d6+ Kf5g6 76.Kf3g3 g5g4
10 00:03 1.083.532 291.585 +0,12 70.Sg5xf7 Kg7f6 71.Sf7d6 Tf5e5+ 72.Sd6e4+ Kf6f5 73.Tc7f7+ Kf5g4 74.Tf7f4+ Kg4h3 75.Ke3f3 g6g5 76.Tf4f8
10 00:04 1.112.485 291.531 +0,12 70.Sg5xf7 Kg7f6 71.Sf7d6 Tf5e5+ 72.Sd6e4+ Kf6f5 73.Tc7f7+ Kf5g4 74.Tf7f4+ Kg4h3 75.Ke3f3 g6g5 76.Tf4f8
11 00:06 1.782.615 294.695 +0,11 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Ke3f3 Ta5a3+ 74.Kf3e4 Ta3a7 75.Tc6c5+ Kg5g4 76.Sd6c4 g6g5 77.Sc4e5+ Kg4h4
11 00:06 1.851.961 297.790 +0,11 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Ke3f3 Ta5a3+ 74.Kf3e4 Ta3a7 75.Tc6c5+ Kg5g4 76.Sd6c4 g6g5 77.Sc4e5+ Kg4h4
12 00:09 2.794.104 301.934 +0,11 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Tc6b6 Ta5a3+ 74.Ke3e4 Ta3a4+ 75.Ke4e5 Ta4a5+ 76.Sd6b5 h5h4 77.Ke5e4
12 00:09 2.912.212 304.815 +0,11 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Tc6b6 Ta5a3+ 74.Ke3e4 Ta3a4+ 75.Ke4e5 Ta4a5+ 76.Sd6b5 h5h4 77.Ke5e4
13 00:17 5.298.830 312.338 +0,11 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Ke3e4 h5h4 74.Sd6c4 Ta5a2 75.Tc6c5+ Kg5f6 76.Ke4f4 h4h3 77.Tc5c6+ Kf6g7
13 00:17 5.553.870 314.381 +0,11 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Ke3e4 h5h4 74.Sd6c4 Ta5a2 75.Tc6c5+ Kg5f6 76.Ke4f4 h4h3 77.Tc5c6+ Kf6g7
14 00:45 14.295.108 316.999 +0,10 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Sd6c4 Ta5f5 74.Sc4d2 h5h4 75.Tc6d6 h4h3 76.Sd2f3+ Kg5h6 77.Ke3e4 Tf5f8
14 00:48 15.454.741 319.643 +0,10 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Sd6c4 Ta5f5 74.Sc4d2 h5h4 75.Tc6d6 h4h3 76.Sd2f3+ Kg5h6 77.Ke3e4 Tf5f8
15 01:27 27.343.032 314.450 +0,10 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Sd6c4 Ta5a1 74.Tc6c5+ Kg5h4 75.Sc4e5 Ta1a3+ 76.Ke3f2 Ta3a2+ 77.Kf2f3 Ta2a3+ 78.Kf3e4 Ta3a4+ 79.Tc5c4 Ta4xc4+ 80.Ke4e3 g6g5 81.Ke3f3
15 01:31 28.916.084 317.197 +0,10 70.Sg5xf7 Tf5a5 71.Sf7d6+ Kg7f6 72.Tc7c6 Kf6g5 73.Sd6c4 Ta5a1 74.Tc6c5+ Kg5h4 75.Sc4e5 Ta1a3+ 76.Ke3f2 Ta3a2+ 77.Kf2f3 Ta2a3+ 78.Kf3e4 Ta3a4+ 79.Tc5c4 Ta4xc4+ 80.Ke4e3 g6g5 81.Ke3f3

Note that this was with 4-men EGTBs and an EGTB cache of 16M (set in the GUI).

Without them, everything is fine.

Code: Select all

FEN: 8/2R2nk1/6p1/5rNp/8/4K3/8/8 w - - 6 70

Zappa 1.0:
1 00:00 64 0 -1,74 70.Sg5e4
2 00:00 406 0 -2,25 70.Sg5e6+ Kg7h6 71.Se6f4
3 00:00 1.624 162.400 -2,19 70.Sg5e4 Kg7h6 71.Tc7c6
4 00:00 3.911 195.550 -2,48 70.Sg5e6+ Kg7f6 71.Se6d4 Tf5e5+ 72.Ke3f3 h5h4
5 00:00 9.672 161.200 -2,37 70.Sg5e4 Kg7h6 71.Tc7c8 Tf5f1 72.Tc8c6
6 00:00 14.467 160.744 -2,49 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1
6 00:00 23.299 155.326 -2,49 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1
7 00:00 33.934 161.590 -2,52 70.Sg5e4 Kg7h6 71.Tc7c8 Sf7g5 72.Se4d6 Tf5f3+ 73.Ke3e2 Tf3f4 74.Tc8h8+ Kh6g7
7 00:00 63.465 204.725 -2,52 70.Sg5e4 Kg7h6 71.Tc7c8 Sf7g5 72.Se4d6 Tf5f3+ 73.Ke3e2 Tf3f4 74.Tc8h8+ Kh6g7
8 00:00 94.824 225.771 -2,50 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1 73.Se4g3 Tf1g1
8 00:00 130.644 241.933 -2,50 70.Sg5e4 Kg7h6 71.Se4g3 Tf5f6 72.Sg3e4 Tf6f1 73.Se4g3 Tf1g1
9 00:00 158.487 251.167 -2,51 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3d4 Te5g5 73.Sg3e4 Tg5f5 74.Kd4e3 h5h4 75.Ke3d4
9 00:01 243.181 272.930 -2,51 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3d4 Te5g5 73.Sg3e4 Tg5f5 74.Kd4e3 h5h4 75.Ke3d4
10 00:02 563.138 275.642 -2,79 70.Sg5e4 g6g5 71.Se4g3 Tf5e5+ 72.Ke3f3 h5h4 73.Sg3e4 Te5f5+ 74.Kf3g2 Kg7g6 75.Tc7c6+ Kg6h5 76.Kg2h3
10 00:03 942.436 281.828 -2,79 70.Sg5e4 g6g5 71.Se4g3 Tf5e5+ 72.Ke3f3 h5h4 73.Sg3e4 Te5f5+ 74.Kf3g2 Kg7g6 75.Tc7c6+ Kg6h5 76.Kg2h3
11 00:04 1.375.405 292.888 -2,83 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3f4 g6g5+ 73.Kf4f3 Sf7d8 74.Tc7c8 Te5d5 75.Kf3e4 Td5d2 76.Ke4f5
11 00:07 2.234.230 295.493 -2,83 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3f4 g6g5+ 73.Kf4f3 Sf7d8 74.Tc7c8 Te5d5 75.Kf3e4 Td5d2 76.Ke4f5
12 00:10 2.974.078 297.586 -3,00 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3f4 g6g5+ 73.Kf4f3 Sf7d8 74.Tc7c8 Te5d5 75.Tc8c7 g5g4+ 76.Kf3e4 Td5d4+ 77.Ke4f5 h5h4
12 00:19 5.406.539 280.465 -3,00 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3f4 g6g5+ 73.Kf4f3 Sf7d8 74.Tc7c8 Te5d5 75.Tc8c7 g5g4+ 76.Kf3e4 Td5d4+ 77.Ke4f5 h5h4
13 00:27 7.346.071 266.171 -3,08 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3f4 g6g5+ 73.Kf4f3 Sf7d8 74.Tc7c8 g5g4+ 75.Kf3f4 Te5e8 76.Sg3f5+ Kh6g6 77.Sf5h4+ Kg6f6 78.Tc8c3 Te8e2
13 00:51 13.771.293 268.378 -3,08 70.Sg5e4 Kg7h6 71.Se4g3 Tf5e5+ 72.Ke3f4 g6g5+ 73.Kf4f3 Sf7d8 74.Tc7c8 g5g4+ 75.Kf3f4 Te5e8 76.Sg3f5+ Kh6g6 77.Sf5h4+ Kg6f6 78.Tc8c3 Te8e2
14 01:26 24.565.300 282.964 -3,27 70.Sg5e4 g6g5 71.Se4d6 Tf5f1 72.Ke3e2 Tf1f4 73.Ke2e3 Kg7g6 74.Sd6c8 h5h4 75.Sc8e7+ Kg6h5 76.Se7d5 Tf4f5 77.Tc7c5

As well as when you set the EGTB cache to 8M (in the GUI not the ini-file).

Code: Select all

FEN: 8/2R2nk1/6p1/5rNp/8/4K3/8/8 w - - 0 1

Zappa 1.0:
   1   00:00             64   0   -1,74   1.Sg5e4
   2   00:00            406   0   -2,25   1.Sg5e6+ Kg7h6 2.Se6f4
   3   00:00          1.624   162.400   -2,19   1.Sg5e4 Kg7h6 2.Tc7c6
   4   00:00          3.911   195.550   -2,48   1.Sg5e6+ Kg7f6 2.Se6d4 Tf5e5+ 3.Ke3f3 h5h4
   5   00:00          9.672   161.200   -2,37   1.Sg5e4 Kg7h6 2.Tc7c8 Tf5f1 3.Tc8c6
   6   00:00         14.467   160.744   -2,49   1.Sg5e4 Kg7h6 2.Se4g3 Tf5f6 3.Sg3e4 Tf6f1
   6   00:00         23.299   155.326   -2,49   1.Sg5e4 Kg7h6 2.Se4g3 Tf5f6 3.Sg3e4 Tf6f1
   7   00:00         33.934   168.825   -2,52   1.Sg5e4 Kg7h6 2.Tc7c8 Sf7g5 3.Se4d6 Tf5f3+ 4.Ke3e2 Tf3f4 5.Tc8h8+ Kh6g7
   7   00:00         63.466   210.850   -2,52   1.Sg5e4 Kg7h6 2.Tc7c8 Sf7g5 3.Se4d6 Tf5f3+ 4.Ke3e2 Tf3f4 5.Tc8h8+ Kh6g7
   8   00:00         94.825   230.717   -2,50   1.Sg5e4 Kg7h6 2.Se4g3 Tf5f6 3.Sg3e4 Tf6f1 4.Se4g3 Tf1g1
   8   00:00        130.645   250.758   -2,50   1.Sg5e4 Kg7h6 2.Se4g3 Tf5f6 3.Sg3e4 Tf6f1 4.Se4g3 Tf1g1
   9   00:00        158.488   259.391   -2,51   1.Sg5e4 Kg7h6 2.Se4g3 Tf5e5+ 3.Ke3d4 Te5g5 4.Sg3e4 Tg5f5 5.Kd4e3 h5h4 6.Ke3d4
   9   00:01        243.183   278.879   -2,51   1.Sg5e4 Kg7h6 2.Se4g3 Tf5e5+ 3.Ke3d4 Te5g5 4.Sg3e4 Tg5f5 5.Kd4e3 h5h4 6.Ke3d4
  10   00:02        563.140   278.368   -2,79   1.Sg5e4 g6g5 2.Se4g3 Tf5e5+ 3.Ke3f3 h5h4 4.Sg3e4 Te5f5+ 5.Kf3g2 Kg7g6 6.Tc7c6+ Kg6h5 7.Kg2h3
  10   00:03        942.073   281.636   -2,79   1.Sg5e4 g6g5 2.Se4g3 Tf5e5+ 3.Ke3f3 h5h4 4.Sg3e4 Te5f5+ 5.Kf3g2 Kg7g6 6.Tc7c6+ Kg6h5 7.Kg2h3
  11   00:04      1.375.047   292.128   -2,83   1.Sg5e4 Kg7h6 2.Se4g3 Tf5e5+ 3.Ke3f4 g6g5+ 4.Kf4f3 Sf7d8 5.Tc7c8 Te5d5 6.Kf3e4 Td5d2 7.Ke4f5
  11   00:07      2.232.962   294.936   -2,83   1.Sg5e4 Kg7h6 2.Se4g3 Tf5e5+ 3.Ke3f4 g6g5+ 4.Kf4f3 Sf7d8 5.Tc7c8 Te5d5 6.Kf3e4 Td5d2 7.Ke4f5
  12   00:10      2.972.667   297.713   -3,00   1.Sg5e4 Kg7h6 2.Se4g3 Tf5e5+ 3.Ke3f4 g6g5+ 4.Kf4f3 Sf7d8 5.Tc7c8 Te5d5 6.Tc8c7 g5g4+ 7.Kf3e4 Td5d4+ 8.Ke4f5 h5h4



Cheers,

Martin

[Gábor Szots]

Hi,

I encountered a very similar problem and it seems that it is related to the size of the EGTB cache, since with any other cache sizes than 8M the problem will appear.

Martin

Hi all,

I set my EGTB cache to 4 MB's in Arena, and, as you can see from my log, Zappa rounds this down to 0. Still, in Jos?'s position it does not want to capture at a6.

G?bor

[MartinB]

I set my EGTB cache to 4 MB's in Arena, and, as you can see from my log, Zappa rounds this down to 0. Still, in Jos?'s position it does not want to capture at a6.

G?bor

Hi G?bor,

can you please try my position on your machine?

Best,

Martin

[Gábor Szots]

I set my EGTB cache to 4 MB's in Arena, and, as you can see from my log, Zappa rounds this down to 0. Still, in Jos?'s position it does not want to capture at a6.

G?bor

Hi G?bor,

can you please try my position on your machine?

Best,

Martin

Strange. I found the same thing with your position, while there is still no problem with Jos?'s position.
Here is the log file including both analyses:
(Note: I included KRPKR with the 4-man tablebases, in order to prove my point. It seems that the reason is not the incompleteness of EGTB's.)

set_option(): tbcache = 4194304 (4M)
tablebase_setcache(): allocated 4096kb of memory.
set_option(): tbpath = D:\Sakk\TB
tablebase_init(): searching for EGTBs at path "D:\Sakk\TB"
tablebase_init(): found EGTBs with up to 5 pieces.
tablebase_init(): EGTB indices & decompression using 1849kb of memory
set_option(): hash = 33554432 (32M)
hash_reallocate(): Allocated transposition table: 32M
set_option(): phash = 8388608 (8M)
set_option(): threads = 1
game_start_thread(0): spawning worker thread!
set_option(): scorepov = 1
set_option(): kibitz = 3
set_option(): book = public.zbook
hash_reallocate(): Allocated pawn hash table: 8M
hash_reallocate(): Allocated king hash table: 8M
worker_cpu(): CPU0 starting.
set_option(): tbcache = 4
tablebase_setcache(): allocated 0kb of memory.
set_option(): hash = 50331648 (48M)
hash_reallocate(): trimming bytes to power of two (48M -> 32M)
hash_reallocate(): Allocated transposition table: 32M
set_option: unknown option Resign_Score
- - - - - - - -
r - - - - - - p
P - - - R - - -
- - - P - - - -
- - - - - k - -
- - - - - - - K
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:BLACK EP:0
MB: 100 WPC: 1 BPC: 1 HM:0 HKL:4AB1FE6E HKH:41CB3C07

Book Lookup failed (0 entries / 472 bytes / 0 ms)

1... Kf4-f5
= (-1.95) Depth: 1/3 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4
= (-2.21) Depth: 2/5 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Kf3-f4
= (-2.14) Depth: 3/8 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.84) Depth: 4/9 00:00:00.00 1kN (1 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-f6 Kf4-e5
= (-1.70) Depth: 4/9 00:00:00.01 1kN (177 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-h6 Kf4-g5 3. Rh6-h4 Rd7xd5 4. Rh4xh7
= (-1.51) Depth: 5/10 00:00:00.03 3kN (129 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.07 10kN (146 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.08 10kN (135 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.38) Depth: 7/14 00:00:00.14 19kN (138 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.15 21kN (143 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.16 22kN (139 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.36 55kN (154 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.37 56kN (153 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:00.91 154kN (169 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:00.95 160kN (169 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7xa6 7. Re6xh6 Kf4-e5 8. d6-d7
= (-1.46) Depth: 10/20 00:00:02.18 396kN (182 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7-d7
= (-1.46) Depth: 10/20 00:00:02.43 442kN (182 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7 Ra5-a2 5. Re7-f7 Kf4-e5 6. Kh4-h5 Ke5-e6 7. Rf7-c7
= (-1.22) Depth: 11/21 00:00:04.12 801kN (194 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7 Ra5-a2 5. Re7-f7 Kf4-e5 6. Kh4-h5 Ke5-e6 7. Rf7-c7
= (-1.22) Depth: 11/21 00:00:04.24 823kN (194 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Kf4-f5 6. Re8-c8 Ra7xa6 7. d6-d7
= (-1.22) Depth: 12/21 00:00:06.66 1367kN (205 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Kf4-f5 6. Re8-c8 Ra7xa6 7. d6-d7
= (-1.22) Depth: 12/21 00:00:06.85 1408kN (206 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Ra7-d7 6. Re8-e7 Rd7xd6 7. a6-a7 Rd6-a6
= (-1.68) Depth: 13/24 00:00:11.06 2287kN (207 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Ra7-d7 6. Re8-e7 Rd7xd6 7. a6-a7 Rd6-a6
= (-1.68) Depth: 13/25 00:00:29.51 6323kN (214 KN/s, 0 splits, 0 aborts)

Count: Time: 35851ms, Nodes: 7759175 Qnodes: 5198484[67.0%][19.8%], NPS: 216K
Hash: TProbes: 7756853[100.0%] TPings: 5118390[66.0%] THits: 3016296[38.9%]
EHash: KHits 1675996[71.3%] PHits 671926[99.7%] POverall: 2347922[99.9%]
Exts: Check: 152109 Singular: 0 Mate: 0 One-rep: 0
TB: Probes:1819 Hits: 182[10.0%]
Idle: CPU0: 0

- - - - - - - -
- - R - - n k -
- - - - - - p -
- - - - - r N p
- - - - - - - -
- - - - K - - -
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:WHITE EP:0
MB: -200 WPC: 2 BPC: 2 HM:0 HKL:DB0A6B03 HKH:42A1D9A9

Book Lookup failed (0 entries / 388 bytes / 0 ms)

1. Ng5-e4
= (-1.74) Depth: 1/4 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1. Ng5-e6 Kg7-h6 2. Ne6-f4
= (-2.25) Depth: 2/8 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c6
= (-2.19) Depth: 3/8 00:00:00.01 1kN (162 KN/s, 0 splits, 0 aborts)
1. Ng5-e6 Kg7-f6 2. Ne6-d4 Rf5-e5 3. Ke3-f3 h5-h4
= (-2.48) Depth: 4/11 00:00:00.02 3kN (196 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Rf5-f1 3. Rc8-c6
= (-2.37) Depth: 5/14 00:00:00.06 9kN (161 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1
= (-2.49) Depth: 6/14 00:00:00.09 14kN (161 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1
= (-2.49) Depth: 6/16 00:00:00.15 23kN (155 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Nf7-g5 3. Ne4-d6 Rf5-f3 4. Ke3-e2 Rf3-f4 5. Rc8-h8 Kh6-g7
= (-2.52) Depth: 7/16 00:00:00.21 33kN (162 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Nf7-g5 3. Ne4-d6 Rf5-f3 4. Ke3-e2 Rf3-f4 5. Rc8-h8 Kh6-g7
= (-2.52) Depth: 7/16 00:00:00.38 63kN (167 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1 4. Ne4-g3 Rf1-g1
= (-2.50) Depth: 8/16 00:00:00.56 94kN (169 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1 4. Ne4-g3 Rf1-g1
= (-2.50) Depth: 8/18 00:00:00.75 130kN (174 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-d4 Re5-g5 4. Ng3-e4 Rg5-f5 5. Kd4-e3 h5-h4 6. Ke3-d4
= (-2.51) Depth: 9/20 00:00:00.90 158kN (176 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-d4 Re5-g5 4. Ng3-e4 Rg5-f5 5. Kd4-e3 h5-h4 6. Ke3-d4
= (-2.51) Depth: 9/21 00:00:01.33 243kN (183 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 g6-g5 2. Ne4-g3 Rf5-e5 3. Ke3-f3 h5-h4 4. Ng3-e4 Re5-f5 5. Kf3-g2 Kg7-g6 6. Rc7-c6 Kg6-h5 7. Kg2-h3
= (-2.79) Depth: 10/21 00:00:03.14 563kN (179 KN/s, 0 splits, 0 aborts)
1. Rc7xf7!
+ (-2.21) Depth: 10/21 00:00:03.17 568kN (179 KN/s, 0 splits, 0 aborts)
1. Rc7xf7!
+ (-0.71) Depth: 10/21 00:00:03.17 570kN (180 KN/s, 0 splits, 0 aborts)
1. Rc7xf7 Rf5xf7 2. Ng5xf7 Kg7-f6 3. Nf7-d6 g6-g5 4. Ke3-f3 Kf6-e6 5. Nd6-e4 Ke6-f5 6. Ne4-d6 Kf5-g6 7. Kf3-g3 g5-g4
= (0.08) Depth: 10/21 00:00:03.23 580kN (179 KN/s, 0 splits, 0 aborts)
1. Ng5xf7 Kg7-f6 2. Nf7-d6 Rf5-e5 3. Nd6-e4 Kf6-f5 4. Rc7-f7 Kf5-g4 5. Rf7-f4 Kg4-h3 6. Ke3-f3 g6-g5 7. Rf4-f8
= (0.12) Depth: 10/24 00:00:05.85 1100kN (188 KN/s, 0 splits, 0 aborts)
1. Ng5xf7 Kg7-f6 2. Nf7-d6 Rf5-e5 3. Nd6-e4 Kf6-f5 4. Rc7-f7 Kf5-g4 5. Rf7-f4 Kg4-h3 6. Ke3-f3 g6-g5 7. Rf4-f8
= (0.12) Depth: 10/24 00:00:05.97 1129kN (189 KN/s, 0 splits, 0 aborts)
1. Ng5xf7 Rf5-a5 2. Nf7-d6 Kg7-f6 3. Rc7-c6 Kf6-g5 4. Ke3-f3 Ra5-a3 5. Kf3-e4 Ra3-a7 6. Rc6-c5 Kg5-g4 7. Nd6-c4 g6-g5 8. Nc4-e5 Kg4-h4
= (0.11) Depth: 11/24 00:00:09.60 1812kN (189 KN/s, 0 splits, 0 aborts)
1. Ng5xf7 Rf5-a5 2. Nf7-d6 Kg7-f6 3. Rc7-c6 Kf6-g5 4. Ke3-f3 Ra5-a3 5. Kf3-e4 Ra3-a7 6. Rc6-c5 Kg5-g4 7. Nd6-c4 g6-g5 8. Nc4-e5 Kg4-h4
= (0.11) Depth: 11/24 00:00:09.87 1882kN (191 KN/s, 0 splits, 0 aborts)
1. Ng5xf7 Rf5-a5 2. Nf7-d6 Kg7-f6 3. Rc7-c6 Kf6-g5 4. Rc6-b6 Ra5-a3 5. Ke3-e4 Ra3-a4 6. Ke4-e5 Ra4-a5 7. Nd6-b5 h5-h4 8. Ke5-e4
= (0.11) Depth: 12/26 00:00:14.93 2872kN (192 KN/s, 0 splits, 0 aborts)
1. Ng5xf7 Rf5-a5 2. Nf7-d6 Kg7-f6 3. Rc7-c6 Kf6-g5 4. Rc6-b6 Ra5-a3 5. Ke3-e4 Ra3-a4 6. Ke4-e5 Ra4-a5 7. Nd6-b5 h5-h4 8. Ke5-e4
= (0.11) Depth: 12/26 00:00:15.39 2990kN (194 KN/s, 0 splits, 0 aborts)

Count: Time: 20830ms, Nodes: 4068663 Qnodes: 2866776[70.5%][24.0%], NPS: 195K
Hash: TProbes: 4064616[99.9%] TPings: 1984690[48.8%] THits: 1120118[27.6%]
EHash: KHits 1312002[78.8%] PHits 352296[99.9%] POverall: 1664298[100.0%]
Exts: Check: 129541 Singular: 0 Mate: 0 One-rep: 0
TB: Probes:278 Hits: 34[12.2%]
Idle: CPU0: 0

game_stop_thread(): stopping CPU0
worker_cpu(): CPU0 exiting.

[Gábor Szots]

I set my EGTB cache to 4 MB's in Arena, and, as you can see from my log, Zappa rounds this down to 0. Still, in Jos?'s position it does not want to capture at a6.

G?bor

Hi G?bor,

can you please try my position on your machine?

Best,

Martin

How about this, played on my Athlon XP, with full set of up to 5-man EGTB's. Now in Jos?'s position Zappa makes Rxa6 while in Martin's position it sees mate in 9 via Rxf7!

Here is the log:

set_option(): tbcache = 16777216 (16M)
tablebase_setcache(): allocated 16384kb of memory.
set_option(): tbpath = C:\Sakk\TB.emd
tablebase_init(): searching for EGTBs at path "C:\Sakk\TB.emd"
tablebase_init(): found EGTBs with up to 5 pieces.
tablebase_init(): EGTB indices & decompression using 20483kb of memory
set_option(): hash = 134217728 (128M)
hash_reallocate(): Allocated transposition table: 128M
set_option(): phash = 8388608 (8M)
set_option(): threads = 1
game_start_thread(0): spawning worker thread!
set_option(): scorepov = 1
set_option(): kibitz = 3
set_option(): book = public.zbook
hash_reallocate(): Allocated pawn hash table: 8M
hash_reallocate(): Allocated king hash table: 8M
worker_cpu(): CPU0 starting.
set_option(): tbcache = 16
tablebase_setcache(): allocated 0kb of memory.
set_option: unknown option Resign_Score
- - - - - - - -
r - - - - - - p
P - - - R - - -
- - - P - - - -
- - - - - k - -
- - - - - - - K
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:BLACK EP:0
MB: 100 WPC: 1 BPC: 1 HM:0 HKL:4AB1FE6E HKH:41CB3C07

Book Lookup failed (0 entries / 472 bytes / 0 ms)

1... Kf4-f5
= (-1.95) Depth: 1/3 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4
= (-2.21) Depth: 2/5 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Kf3-f4
= (-2.14) Depth: 3/8 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.84) Depth: 4/9 00:00:00.00 1kN (1 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-f6 Kf4-e5
= (-1.70) Depth: 4/9 00:00:00.00 1kN (1 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-h6 Kf4-g5 3. Rh6-h4 Rd7xd5 4. Rh4xh7
= (-1.51) Depth: 5/10 00:00:00.00 3kN (1 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.03 10kN (330 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.03 10kN (349 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.38) Depth: 7/14 00:00:00.06 19kN (307 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.07 21kN (275 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.07 22kN (286 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.20 55kN (273 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.20 56kN (279 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:00.48 154kN (318 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:00.50 160kN (322 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-e8 Rd7-a7 3. d5-d6 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7xa6 7. Re6xh6 Ra6-a2 8. Kf2-g1
= (-1.46) Depth: 10/20 00:00:01.28 470kN (367 KN/s, 0 splits, 0 aborts)
1 ...h7-h5!
+ (-0.95) Depth: 10/20 00:00:01.54 592kN (383 KN/s, 0 splits, 0 aborts)
1... h7-h5 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Kh3-h4 Kd5-c5 5. Rb6-e6 Kc5-b5 6. Re6-e5 Kb5-b6 7. Kh4-g5 Ra7xa6
= (-0.26) Depth: 10/20 00:00:01.95 757kN (388 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-a2 4. Kg2-h3 Ra2-d2 5. Re7xh7 Rd2xd5 6. Rh7-f7 Kf4-e4 7. Rf7-e7 Rd5-e5 8. Re7-d7 Re5-d5
= (0.12) Depth: 10/20 00:00:02.62 1029kN (392 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-a2 4. Kg2-h3 Ra2-d2 5. Re7xh7 Rd2xd5 6. Rh7-f7 Kf4-e4 7. Rf7-e7 Rd5-e5 8. Re7-d7 Re5-d5
= (0.12) Depth: 10/20 00:00:02.62 1030kN (392 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-d6 3. Re7-e4 Kf4-f5 4. Re4-h4 h7-h6 5. Kh3-g3 Kf5-e5 6. Rh4-h5 Ke5-e4 7. Rh5-h4 Ke4xd5 8. Rh4-f4
= (0.22) Depth: 11/21 00:00:03.93 1540kN (391 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-d6 3. Re7-e4 Kf4-f5 4. Re4-h4 h7-h6 5. Kh3-g3 Kf5-e5 6. Rh4-h5 Ke5-e4 7. Rh5-h4 Ke4xd5 8. Rh4-f4
= (0.22) Depth: 11/21 00:00:03.95 1549kN (392 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-d3 4. d5-d6 Rd3-d2 5. Kg2-h3 Rd2-d3 6. Kh3-g2
= (0.17) Depth: 12/25 00:00:07.01 2896kN (413 KN/s, 0 splits, 0 aborts)
1... Ra7xa6 2. Re6-e7 Ra6-a3 3. Kh3-g2 Ra3-d3 4. d5-d6 Rd3-d2 5. Kg2-h3 Rd2-d3 6. Kh3-g2
= (0.17) Depth: 12/25 00:00:07.04 2908kN (413 KN/s, 0 splits, 0 aborts)

Count: Time: 15125ms, Nodes: 6634233 Qnodes: 4434249[66.8%][19.2%], NPS: 439K
Hash: TProbes: 6640402[100.1%] TPings: 4441656[66.9%] THits: 2557178[38.5%]
EHash: KHits 1436245[70.9%] PHits 588958[99.9%] POverall: 2025203[100.0%]
Exts: Check: 185166 Singular: 0 Mate: 0 One-rep: 0
TB: Probes:824 Hits: 824[100.0%]
Idle: CPU0: 0

- - - - - - - -
- - R - - n k -
- - - - - - p -
- - - - - r N p
- - - - - - - -
- - - - K - - -
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:WHITE EP:0
MB: -200 WPC: 2 BPC: 2 HM:0 HKL:DB0A6B03 HKH:42A1D9A9

Book Lookup failed (0 entries / 388 bytes / 0 ms)

1. Ng5-e4
= (-1.74) Depth: 1/4 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1. Ng5-e6 Kg7-h6 2. Ne6-f4
= (-2.25) Depth: 2/8 00:00:00.00 0kN (1 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c6
= (-2.19) Depth: 3/8 00:00:00.00 1kN (1 KN/s, 0 splits, 0 aborts)
1. Ng5-e6 Kg7-f6 2. Ne6-d4 Rf5-e5 3. Ke3-f3 h5-h4
= (-2.48) Depth: 4/11 00:00:00.00 3kN (1 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Rf5-f1 3. Rc8-c6
= (-2.37) Depth: 5/14 00:00:00.01 9kN (645 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1
= (-2.49) Depth: 6/14 00:00:00.03 14kN (467 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1
= (-2.49) Depth: 6/16 00:00:00.06 23kN (376 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Nf7-g5 3. Ne4-d6 Rf5-f3 4. Ke3-e2 Rf3-f4 5. Rc8-h8 Kh6-g7
= (-2.52) Depth: 7/16 00:00:00.09 33kN (365 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Nf7-g5 3. Ne4-d6 Rf5-f3 4. Ke3-e2 Rf3-f4 5. Rc8-h8 Kh6-g7
= (-2.52) Depth: 7/16 00:00:00.17 63kN (369 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1 4. Ne4-g3 Rf1-g1
= (-2.50) Depth: 8/16 00:00:00.25 94kN (379 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1 4. Ne4-g3 Rf1-g1
= (-2.50) Depth: 8/18 00:00:00.34 130kN (381 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-d4 Re5-g5 4. Ng3-e4 Rg5-f5 5. Kd4-e3 h5-h4 6. Ke3-d4
= (-2.51) Depth: 9/20 00:00:00.42 158kN (376 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-d4 Re5-g5 4. Ng3-e4 Rg5-f5 5. Kd4-e3 h5-h4 6. Ke3-d4
= (-2.51) Depth: 9/21 00:00:00.62 243kN (389 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 g6-g5 2. Ne4-g3 Rf5-e5 3. Ke3-f3 h5-h4 4. Ng3-e4 Re5-f5 5. Kf3-g2 Kg7-g6 6. Rc7-c6 Kg6-h5 7. Kg2-h3
= (-2.79) Depth: 10/21 00:00:01.46 563kN (384 KN/s, 0 splits, 0 aborts)
1. Rc7xf7!
+ (-2.21) Depth: 10/21 00:00:01.48 568kN (383 KN/s, 0 splits, 0 aborts)
1. Rc7xf7!
+ (-0.71) Depth: 10/21 00:00:01.48 569kN (384 KN/s, 0 splits, 0 aborts)
1. Rc7xf7 Kg7-h6 2. Rf7xf5 Kh6-g7 3. Rf5-f7 Kg7-g8 4. Rf7-g7 Kg8-f8 5. Ng5-e6 Kf8-e8 6. Ke3-f4 h5-h4 7. Kf4-g4 h4-h3 8. Kg4xh3
= (12.52) Depth: 10/22 00:00:02.48 1012kN (408 KN/s, 0 splits, 0 aborts)
1. Rc7xf7 Kg7-h6 2. Rf7xf5 Kh6-g7 3. Rf5-f7 Kg7-g8 4. Rf7-g7 Kg8-f8 5. Ng5-e6 Kf8-e8 6. Ke3-f4 h5-h4 7. Kf4-g4 h4-h3 8. Kg4xh3
= (12.52) Depth: 10/22 00:00:02.54 1044kN (410 KN/s, 0 splits, 0 aborts)
1. Rc7xf7!
+ (12.82) Depth: 11/23 00:00:04.23 1808kN (427 KN/s, 0 splits, 0 aborts)
1. Rc7xf7!
+ (14.32) Depth: 11/23 00:00:04.96 2136kN (430 KN/s, 0 splits, 0 aborts)
1. Rc7xf7 Kg7-h8 2. Rf7xf5 Kh8-g8 3. Rf5-f8 Kg8-g7 4. Ng5-e6 Kg7-h7 5. Ke3-f4 h5-h4 6. Kf4-e5 h4-h3 7. Ke5-f6 h3-h2 8. Ne6-g5 Kh7-h6 9. Rf8-h8
= (MAT9) Depth: 11/23 00:00:05.78 2543kN (440 KN/s, 0 splits, 0 aborts)
1. Rc7xf7 Kg7-h8 2. Rf7xf5 Kh8-g8 3. Rf5-f8 Kg8-g7 4. Ng5-e6 Kg7-h7 5. Ke3-f4 h5-h4 6. Kf4-e5 h4-h3 7. Ke5-f6 h3-h2 8. Ne6-g5 Kh7-h6 9. Rf8-h8
= (MAT9) Depth: 11/23 00:00:05.89 2607kN (443 KN/s, 0 splits, 0 aborts)
1. Rc7xf7 Kg7-h8 2. Rf7xf5 Kh8-g8 3. Rf5-f8 Kg8-g7 4. Ng5-e6 Kg7-h7 5. Ke3-f4 h5-h4 6. Kf4-e5 h4-h3 7. Ke5-f6 h3-h2 8. Ne6-g5 Kh7-h6 9. Rf8-h8
= (MAT9) Depth: 12/23 00:00:09.81 4598kN (469 KN/s, 0 splits, 0 aborts)
1. Rc7xf7 Kg7-h8 2. Rf7xf5 Kh8-g8 3. Rf5-f8 Kg8-g7 4. Ng5-e6 Kg7-h7 5. Ke3-f4 h5-h4 6. Kf4-e5 h4-h3 7. Ke5-f6 h3-h2 8. Ne6-g5 Kh7-h6 9. Rf8-h8
= (MAT9) Depth: 12/23 00:00:09.96 4694kN (471 KN/s, 0 splits, 0 aborts)

Count: Time: 15859ms, Nodes: 7584251 Qnodes: 5170357[68.2%][14.8%], NPS: 478K
Hash: TProbes: 7551286[99.6%] TPings: 5233437[69.3%] THits: 3896826[51.6%]
EHash: KHits 1605907[78.4%] PHits 442229[99.9%] POverall: 2048136[100.0%]
Exts: Check: 102945 Singular: 0 Mate: 0 One-rep: 0
TB: Probes:129 Hits: 129[100.0%]
Idle: CPU0: 0

game_stop_thread(): stopping CPU0
worker_cpu(): CPU0 exiting.

[José Carlos]

The bug is definetly related to EGTB's. When I disable them, Zappa doesn't make the same mistakes again (I've seen several loses by Zappa in similar positions).

[Gábor Szots]

The bug is definetly related to EGTB's. When I disable them, Zappa doesn't make the same mistakes again (I've seen several loses by Zappa in similar positions).

Yes, and it is related to EGTB cache. When using Zappa as a WB engine, none of the above described errors occur. The difference is that Zappa allocates 0 memory when UCI, but normal amount when WB.

Here is a log file of the two problems, Zappa running under Arena as a WB engine:

set_option(): tbcache = 16777216 (16M)
tablebase_setcache(): allocated 16384kb of memory.
set_option(): tbpath = C:\Sakk\TB.emd
tablebase_init(): searching for EGTBs at path "C:\Sakk\TB.emd"
tablebase_init(): found EGTBs with up to 5 pieces.
tablebase_init(): EGTB indices & decompression using 20483kb of memory
set_option(): hash = 134217728 (128M)
hash_reallocate(): Allocated transposition table: 128M
set_option(): phash = 8388608 (8M)
set_option(): threads = 1
game_start_thread(0): spawning worker thread!
set_option(): scorepov = 1
set_option(): kibitz = 3
set_option(): book = public.zbook
hash_reallocate(): Allocated pawn hash table: 8M
hash_reallocate(): Allocated king hash table: 8M
worker_cpu(): CPU0 starting.
- - - - - - - -
r - - - - - - p
P - - - R - - -
- - - P - - - -
- - - - - k - -
- - - - - - - K
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:BLACK EP:0
MB: 100 WPC: 1 BPC: 1 HM:0 HKL:4AB1FE6E HKH:41CB3C07

Book Lookup failed (0 entries / 472 bytes / 19 ms)

1... Kf4-f5
= (-1.95) Depth: 1/3 00:00:00.04 0kN (0 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4
= (-2.21) Depth: 2/5 00:00:00.04 0kN (4 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Kf3-f4
= (-2.14) Depth: 3/8 00:00:00.04 0kN (7 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.84) Depth: 4/9 00:00:00.04 1kN (24 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-f6 Kf4-e5
= (-1.70) Depth: 4/9 00:00:00.05 1kN (32 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-h6 Kf4-g5 3. Rh6-h4 Rd7xd5 4. Rh4xh7
= (-1.51) Depth: 5/10 00:00:00.06 3kN (63 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.08 10kN (125 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7
= (-1.68) Depth: 6/12 00:00:00.08 10kN (132 KN/s, 0 splits, 0 aborts)
1 ...Ra7-d7!
+ (-1.38) Depth: 7/14 00:00:00.11 19kN (171 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.11 21kN (183 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-f6 Kf4-e4 5. Rf6-f7
= (-1.38) Depth: 7/14 00:00:00.13 22kN (167 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.22 55kN (248 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h5 4. Kh3-g2 Ra7xa6 5. d6-d7
= (-1.45) Depth: 8/16 00:00:00.22 56kN (250 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:00.48 154kN (321 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Re6-f6 Kf4-e5 3. Rf6-b6 Ke5xd5 4. Rb6-b7 Rd7-d8 5. a6-a7 Rd8-a8 6. Kh3-g3
= (-1.25) Depth: 9/18 00:00:00.49 160kN (324 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7xa6 7. Re6xh6 Kf4-e5 8. d6-d7
= (-1.46) Depth: 10/20 00:00:01.09 396kN (364 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 h7-h6 4. Kh3-g2 Ra7-g7 5. Kg2-f2 Rg7-a7 6. Re8-e6 Ra7-d7
= (-1.46) Depth: 10/20 00:00:01.22 442kN (362 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7 Ra5-a2 5. Re7-f7 Kf4-e5 6. Kh4-h5 Ke5-e6 7. Rf7-c7
= (-1.22) Depth: 11/21 00:00:02.20 795kN (360 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. Kh3-h4 Rd7xd5 3. a6-a7 Rd5-a5 4. Re6-e7 Ra5-a2 5. Re7-f7 Kf4-e5 6. Kh4-h5 Ke5-e6 7. Rf7-c7
= (-1.22) Depth: 11/21 00:00:02.26 817kN (361 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Kf4-f5 6. Re8-c8 Ra7xa6 7. d6-d7
= (-1.22) Depth: 12/21 00:00:03.67 1322kN (360 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Kf4-f5 6. Re8-c8 Ra7xa6 7. d6-d7
= (-1.22) Depth: 12/21 00:00:03.84 1362kN (355 KN/s, 0 splits, 0 aborts)
1... Ra7-d7 2. d5-d6 Rd7-a7 3. Re6-e8 Kf4-f3 4. Kh3-h4 Kf3-f4 5. Kh4-h5 Ra7-d7 6. Re8-e7 Rd7xd6 7. a6-a7 Rd6-a6
= (-1.68) Depth: 13/24 00:00:06.11 2152kN (352 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Ra7-d7 3. Re6-e8 Kf3-f4 4. Re8-b8 Kf4-e5 5. Rb8-b7 Rd7-d8 6. a6-a7 Rd8-a8 7. Rb7-d7 h7-h6
= (-1.67) Depth: 13/24 00:00:07.33 2621kN (358 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h4 Ra7-d7 3. Re6-e8 Kf3-f4 4. Re8-b8 Kf4-e5 5. Rb8-b7 Rd7-d8 6. a6-a7 Rd8-a8 7. Rb7-d7 h7-h6
= (-1.67) Depth: 13/25 00:00:10.81 4016kN (372 KN/s, 0 splits, 0 aborts)
1 ...Kf4-f3!
+ (-1.37) Depth: 14/25 00:00:13.86 5315kN (383 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h2 Kf3-f4 3. Kh2-g2 Ra7-d7 4. d5-d6 Rd7-a7 5. Kg2-f2 h7-h5 6. Re6-e8 Kf4-f5 7. Kf2-e3 Ra7xa6 8. d6-d7
= (-1.30) Depth: 14/25 00:00:15.92 6260kN (393 KN/s, 0 splits, 0 aborts)
1... Kf4-f3 2. Kh3-h2 Kf3-f4 3. Kh2-g2 Ra7-d7 4. d5-d6 Rd7-a7 5. Kg2-f2 h7-h5 6. Re6-e8 Kf4-f5 7. Kf2-e3 Kf5-f6 8. Ke3-f3 Ra7xa6 9. d6-d7
= (-1.30) Depth: 14/25 00:00:16.59 6573kN (396 KN/s, 0 splits, 0 aborts)

Count: Time: 18144ms, Nodes: 7285233 Qnodes: 4807124[66.0%][19.4%], NPS: 402K
Hash: TProbes: 7279511[99.9%] TPings: 5091085[69.9%] THits: 2944255[40.4%]
EHash: KHits 1455157[70.6%] PHits 604638[99.6%] POverall: 2059795[99.9%]
Exts: Check: 137306 Singular: 0 Mate: 0 One-rep: 0
TB: Probes:393 Hits: 393[100.0%]
Idle: CPU0: 0

- - - - - - - -
- - R - - n k -
- - - - - - p -
- - - - - r N p
- - - - - - - -
- - - - K - - -
- - - - - - - -
- - - - - - - -

WQC:0 WKC:0 BQC:0 BKC:0 Turn:WHITE EP:0
MB: -200 WPC: 2 BPC: 2 HM:0 HKL:DB0A6B03 HKH:42A1D9A9

Book Lookup failed (0 entries / 388 bytes / 15 ms)

1. Ng5-e4
= (-1.74) Depth: 1/4 00:00:00.01 0kN (4 KN/s, 0 splits, 0 aborts)
1. Ng5-e6 Kg7-h6 2. Ne6-f4
= (-2.25) Depth: 2/8 00:00:00.02 0kN (18 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c6
= (-2.19) Depth: 3/8 00:00:00.02 1kN (71 KN/s, 0 splits, 0 aborts)
1. Ng5-e6 Kg7-f6 2. Ne6-d4 Rf5-e5 3. Ke3-f3 h5-h4
= (-2.48) Depth: 4/11 00:00:00.03 3kN (126 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Rf5-f1 3. Rc8-c6
= (-2.37) Depth: 5/14 00:00:00.05 9kN (190 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1
= (-2.49) Depth: 6/14 00:00:00.06 14kN (219 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1
= (-2.49) Depth: 6/16 00:00:00.09 23kN (240 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Nf7-g5 3. Ne4-d6 Rf5-f3 4. Ke3-e2 Rf3-f4 5. Rc8-h8 Kh6-g7
= (-2.52) Depth: 7/16 00:00:00.12 33kN (263 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Rc7-c8 Nf7-g5 3. Ne4-d6 Rf5-f3 4. Ke3-e2 Rf3-f4 5. Rc8-h8 Kh6-g7
= (-2.52) Depth: 7/16 00:00:00.20 63kN (313 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1 4. Ne4-g3 Rf1-g1
= (-2.50) Depth: 8/16 00:00:00.28 94kN (328 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-f6 3. Ng3-e4 Rf6-f1 4. Ne4-g3 Rf1-g1
= (-2.50) Depth: 8/18 00:00:00.37 130kN (352 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-d4 Re5-g5 4. Ng3-e4 Rg5-f5 5. Kd4-e3 h5-h4 6. Ke3-d4
= (-2.51) Depth: 9/20 00:00:00.44 158kN (356 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-d4 Re5-g5 4. Ng3-e4 Rg5-f5 5. Kd4-e3 h5-h4 6. Ke3-d4
= (-2.51) Depth: 9/21 00:00:00.63 243kN (382 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 g6-g5 2. Ne4-g3 Rf5-e5 3. Ke3-f3 h5-h4 4. Ng3-e4 Re5-f5 5. Kf3-g2 Kg7-g6 6. Rc7-c6 Kg6-h5 7. Kg2-h3
= (-2.79) Depth: 10/21 00:00:01.47 563kN (382 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 g6-g5 2. Ne4-g3 Rf5-e5 3. Ke3-f3 h5-h4 4. Ng3-e4 Re5-f5 5. Kf3-g2 Kg7-g6 6. Rc7-c6 Kg6-h5 7. Kg2-h3
= (-2.79) Depth: 10/25 00:00:02.50 941kN (376 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-f4 g6-g5 4. Kf4-f3 Nf7-d8 5. Rc7-c8 Re5-d5 6. Kf3-e4 Rd5-d2 7. Ke4-f5
= (-2.83) Depth: 11/25 00:00:03.56 1374kN (386 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-f4 g6-g5 4. Kf4-f3 Nf7-d8 5. Rc7-c8 Re5-d5 6. Kf3-e4 Rd5-d2 7. Ke4-f5
= (-2.83) Depth: 11/25 00:00:05.90 2232kN (378 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-f4 g6-g5 4. Kf4-f3 Nf7-d8 5. Rc7-c8 Re5-d5 6. Rc8-c7 g5-g4 7. Kf3-e4 Rd5-d4 8. Ke4-f5 h5-h4
= (-3.00) Depth: 12/25 00:00:07.71 2971kN (385 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-f4 g6-g5 4. Kf4-f3 Nf7-d8 5. Rc7-c8 Re5-d5 6. Rc8-c7 g5-g4 7. Kf3-e4 Rd5-d4 8. Ke4-f5 h5-h4
= (-3.00) Depth: 12/27 00:00:13.80 5403kN (392 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-f4 g6-g5 4. Kf4-f3 Nf7-d8 5. Rc7-c8 g5-g4 6. Kf3-f4 Re5-e8 7. Ng3-f5 Kh6-g6 8. Nf5-h4 Kg6-f6 9. Rc8-c3 Re8-e2
= (-3.08) Depth: 13/27 00:00:18.34 7336kN (400 KN/s, 0 splits, 0 aborts)
1. Ng5-e4 Kg7-h6 2. Ne4-g3 Rf5-e5 3. Ke3-f4 g6-g5 4. Kf4-f3 Nf7-d8 5. Rc7-c8 g5-g4 6. Kf3-f4 Re5-e8 7. Ng3-f5 Kh6-g6 8. Nf5-h4 Kg6-f6 9. Rc8-c3 Re8-e2
= (-3.08) Depth: 13/29 00:00:34.53 13685kN (396 KN/s, 0 splits, 0 aborts)

Count: Time: 35972ms, Nodes: 14270577 Qnodes: 10295526[72.1%][27.3%], NPS: 397K
Hash: TProbes: 14278545[100.1%] TPings: 6871367[48.1%] THits: 3731618[26.1%]
EHash: KHits 5172678[83.2%] PHits 1046343[99.9%] POverall: 6219021[100.0%]
Exts: Check: 393768 Singular: 0 Mate: 0 One-rep: 0
TB: Probes:78 Hits: 78[100.0%]
Idle: CPU0: 0

game_stop_thread(): stopping CPU0
worker_cpu(): CPU0 exiting.


So te bug seems to be that missing 'M' when giving the size of the EGTB cache.

G?bor

[Guenther Simon]

I have no problem with Zappa and TBS under WB, _if_ I set
another size than default 8M.
With default 8M or even explicetely giving 8M (despite it
is already the default value), Zappa e.g. cannot mate with
KQ vs. K!


Guenther

[Gábor Szots]

I have no problem with Zappa and TBS under WB, _if_ I set
another size than default 8M.
With default 8M or even explicetely giving 8M (despite it
is already the default value), Zappa e.g. cannot mate with
KQ vs. K!


Guenther

Hi G?nther,

There is no problem under WB because EGTB cache size is determined in zappa.ini by a line such as tbcache=16M, where the 'M' tells Zappa to use 16 megabytes. The problem is UCI specific because then Zappa thinks it is given only 16 bytes which it rounds down to 0.

[Guenther Simon]

Hi G?nther,

There is no problem under WB because EGTB cache size is determined in zappa.ini by a line such as tbcache=16M, where the 'M' tells Zappa to use 16 megabytes. The problem is UCI specific because then Zappa thinks it is given only 16 bytes which it rounds down to 0.

Hi Gabor,

Please read my post again, there is _also_ a problem
for Zappa with TBS under WB, when using 8MB cache.

[Gábor Szots]

Hi G?nther,

There is no problem under WB because EGTB cache size is determined in zappa.ini by a line such as tbcache=16M, where the 'M' tells Zappa to use 16 megabytes. The problem is UCI specific because then Zappa thinks it is given only 16 bytes which it rounds down to 0.

Hi Gabor,

Please read my post again, there is _also_ a problem
for Zappa with TBS under WB, when using 8MB cache.

Yes, G?nther, you are right. Also the Jos? and Martin positions result in strange evaluations when using 8 MB tablebase cache. All other values seem to work, though.

Best wishes,
G?bor