Why Dragon-455 had been lunatic for a while?

[George]

Geschrieben von:/Posted by: George at 06 August 2004 23:24:06:

In a normal game between Dragon 455 and Chess Genius 7.0, and while the game was drawn, Dragon at move 49 played the amazing blunder 49.Nc8?? And it played it after thinking for 22 seconds up to depth 12. The line Dragon had was "d6c8+ e7d8 c8b6 e6g7" The e7d8 is a King move to a Rook check!!!!
After the move it saw that it's play was awful immediately. After taking back the move it choosed another move:49.Kf2 and after taking it back again, it prefered 49.Nb5. And now it plays 49.Nb5 all the time. I'm confused! Does Dragon has any learning file that prevents it from playing the losing move again? And can anyone reproduce the move?

Here is the position and the game:
 abcdefgh  8         8  7        7  6      6  5        5  4      4  3         3  2        2  1          1  abcdefgh ChessDiag V1.01 (12-OCT-2002)r7/4kp2/3Nn1pp/2p1p3/2P1P1PP/4P3/3R1K2/8 w - - 0 49

[Event "Computer chess game"]
[Site "?"]
[Date "2004.08.06"]
[Round "?"]
[White "Dragon 455"]
[Black "Chess Genius 7.0"]
[Result "*"]
[ECO "C88"]
[Opening "Ruy Lopez"]
[Time "14:25:15"]
[Variation "Closed, Anti-Marshall (8.a4)"]
[TimeControl "40/900:40/900:900"]
[Termination "unterminated"]
[PlyCount "99"]
[WhiteType "program"]
[BlackType "human"]
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 {(a4b3 d7d6 d2d3
c6a5 c1g5 a5xb3 a2xb3 c8e6 b1c3 b5b4 c3a4) -0.17/10 24} O-O 8.a4 {(a2a4 c8b7 a4xb5
a6xb5 a1xa8 b7xa8 d2d3 e7c5 c1g5 b5b4) 0.04/9 24} Bb7 9.axb5 {(a4xb5 a6xb5 a1xa8
b7xa8 d2d3 e7c5 c1g5 h7h6 g5e3 c5xe3 e1xe3 d7d5) 0.02/9 24} axb5 10.Rxa8 {(a1xa8
d8xa8 d2d3 b5b4 c1g5 h7h6 g5e3 f6g4 b1d2 g4xe3) 0.01/10 24} Qxa8 11.d3 {(d2d3 b5b4
b1d2 e7c5 d2c4 a8a7 c4e3 f8a8 c1d2) -0.06/10 24} b4 12.Nbd2 {(b1d2 e7c5 d2c4 a8a7
e1e2 c6d4 f3xd4 c5xd4 c1g5 d7d6) 0.04/9 34} Bc5 13.Nc4 {(d2c4 d7d6 c1g5 a8c8 c4e3)
0.00/10 24} Qa7 14.Qe2 {(d1e2 d7d6 c1g5 f6h5 f3h4) 0.00/10 24} d6 15.Bg5 {(c1g5 f6h5
f3h4 h7h6 g5e3 h5f4 e3xf4 e5xf4 e2f3 g7g5) 0.09/9 24} Nd7 16.c3 {(c2c3 h7h6 g5e3
f8a8 g1f1 d7f6 f3h4 c5xe3 c4xe3 a7c5) 0.02/9 25} Ra8 17.Ncd2 {(c4d2 h7h6 g5h4 d7f8
b3d5 f8g6 c3xb4 c6xb4 d5xb7) 0.02/8 24} h6 18.Be3 {(g5e3 c5xe3 f2xe3 a7a5 d2c4)
0.00/9 24} Bxe3 19.fxe3 {(f2xe3 b4xc3 b2xc3 c6a5 b3a4 d7f6 d2b3 a5xb3 a4xb3 a7c5 e1a1)
0.01/10 24} Qa5 20.Rc1 {(e1c1 b4xc3 b2xc3 d7c5 b3d5 c5a4 c3c4 a4c3 e2f2) 0.06/9 24}
bxc3 21.bxc3 {(b2xc3 d7c5 b3d5 a5a3 c1c2 a3a1+ d2f1 c6a5 c2b2 b7xd5) 0.02/9 28} Qa3
22.Rb1 {(c1b1 c6a5 d2c4 a5xc4 b3xc4 d7b6 c4b3 a3c5 e2d2 b7c6) 0.04/9 25} Na5 23.Nc4
{(d2c4 a5xc4 b3xc4 d7b6 c4b3 a3c5 e2d2 b7c6 d3d4 e5xd4) 0.07/9 24} Nxc4 24.Bxc4
{(b3xc4 d7b6 c4b3 a3c5 e2d2 a8a3 d3d4 c5c6 d4d5) 0.05/10 24} Bc6 25.Qe1 {(e2e1 d7b6
c4b3 c6a4 b3xa4 b6xa4 b1a1 a3b2 e1d1 a4b6) 0.00/9 30} Nb6 26.Bb3 {(c4b3 c6a4 b3xa4
a8xa4 b1b5 a3a2 e1d1 a4a3 c3c4) -0.05/10 24} Ba4 27.Bxa4 {(b3xa4 a8xa4 f3h4 g7g6 e1d2
a3a2 d2d1) -0.03/10 24} Qxa4 28.Qc1 {(e1c1 a4a2 b1b2 a2e6 c1e1 a8a2 b2f2 a2xf2 e1xf2
b6c4) -0.06/10 24} Nd7 29.Rb4 {(b1b4 a4c6 c1b2 d7c5 b4b8+ a8xb8 b2xb8+ g8h7 b8b1 c6a6
c3c4 a6c6) -0.04/10 27} Qa2 30.Rb2 {(b4b2 a2a1 b2b1 a1a4) 0.00/10 25} Qa1 31.Rb1
{(b2b1 a1a4) 0.00/11 24} Qa7 32.d4 {(d3d4 a7a4 b1b4 a4a1 b4b1 a1a4) 0.00/10 26} Qa2
33.Nd2 {(f3d2 d7b6 b1b2 a2e6 c3c4 a8a5) -0.09/9 25} Nf6 34.h3 {(h2h3 a2e6 d4d5 e6d7
b1b7 d7c8 c1b2 a8a1+ b2xa1 c8xb7) -0.10/9 26} Qa6 35.c4 {(c3c4 a6c6 d4d5 c6d7 c4c5
d7a4 c5xd6 c7xd6 c1c6 a4a2) 0.00/10 25} c5 36.Qb2 {(c1b2 e5xd4 e3xd4 c5xd4 b2xd4
a6a3 e4e5 d6xe5 d4xe5 a8e8 e5f5 a3g3) 0.00/10 25} Qa3 37.Qxa3 {(b2xa3 a8xa3 d4xc5
d6xc5 b1b5 a3d3 d2f3 d3d1+ g1h2 f6xe4 f3xe5 d1f1) -0.17/11 25} Rxa3 38.Rb8+ {(b1b8+
g8h7 d4xc5 d6xc5 g1f2 a3d3 f2e2 d3a3 e2f2) 0.00/12 25} Kh7 39.dxc5 {(d4xc5 a3a1+
b8b1 a1xb1+ d2xb1 d6xc5 b1d2 h7h8 d2f3 f6d7 g1f2 g7g5 g2g4 h8g8) -0.06/12 25} dxc5
40.Kf2 {(g1f2 a3a2 f2e1 a2a1+ e1f2 a1c1 b8b7 h7g6 b7e7 c1c2 f2e1 c2c3) -0.13/12 26}
Ra7 41.Rb2 {(b8b2 h7g8 b2b8+ g8h7) 0.00/12 21} Nd7 42.Nf3 {(d2f3 f7f6 g2g4 h7g8
h3h4 g8f7 h4h5 f7e7) -0.01/11 22} Kg6 43.Nh4+ {(f3h4+ g6g5 g2g3 h6h5 h4f5 d7f6 f2f3
a7a4 f5d6 a4a7 d6f5) 0.00/11 22} Kf6 44.Nf5 {(h4f5 f6g6 f5h4+) 0.00/12 22} Nf8 45.g4
{(g2g4 f8e6 b2d2 e6g5 d2d6+ g5e6 d6d2) 0.00/11 23} Ne6 46.Rd2 {(b2d2 e6g5 d2d6+ g5e6
d6d5 e6g5 d5d6+) 0.00/11 21} g6 47.Nd6 {(f5d6 a7a1 d2d5 a1a2+ f2g3 a2e2 g3f3 e2h2
f3g3 h2e2) 0.00/12 21} Ra8 48.h4 {(h3h4 d7a7 f2e2 a7a2+ d5d2 a2xd2+ e2xd2 f6e7 d6c8+
e7f6 c8d6) 0.00/11 22} Ke7 49.Nc8+ {(d6c8+ e7d8 c8b6 e6g7) 0.61/12 22} Rxc8 50.Ke2
{(f2e2 d7b7 d5xe5 b7b2+ e2f3 b2h2 h4h5 g6g5) -4.12/12 23} *
-------------------------------------------------------------------
After taking back the move, Dragon played 49.Nb5 and finally lost.
At the bottom there is the whole game with the 49.Nb5 continuation.
Another strange thing is that Dragon after 70.Ne7 didn't see the Mate in 6 that Chess Genius saw immediately: Kh4 and mate in 6!
 abcdefgh  8          8  7         7  6        6  5       5  4       4  3        3  2         2  1         1  abcdefgh ChessDiag V1.01 (12-OCT-2002)8/4N3/6pp/2R1p1k1/2P1P1P1/4Pn2/r7/5K2 b - - 0 70

[Event "Computer chess game"]
[Site "?"]
[Date "2004.04.06"]
[Round "?"]
[White "Dragon 455"]
[Black "Chess Genius 7.0"]
[Result "0-1"]
[ECO "C88"]
[WhiteType "program"]
[BlackType "human"]
[Opening "Ruy Lopez"]
[Variation "Closed, Anti-Marshall (8.a4)"]
[Time "unterminated"]
[TimeControl "40/900:40/900:900"]
[Termination "normal"]
[PlyCount "150"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3
{(a4b3 d7d6 d2d3 c6a5 c1g5 a5xb3 a2xb3 c8e6 b1c3 b5b4 c3a4) -0.17/10 24 (a4b3 d7d6 d2d3 c6a5 c1g5 a5xb3 a2xb3 c8e6 b1c3 b5b4 c3a4) -0.17/10 24}
7... O-O 8. a4
{(a2a4 c8b7 a4xb5 a6xb5 a1xa8 b7xa8 d2d3 e7c5 c1g5 b5b4) 0.04/9 24 (a2a4 c8b7 a4xb5 a6xb5 a1xa8 b7xa8 d2d3 e7c5 c1g5 b5b4) 0.04/9 24}
8... Bb7 9. axb5
{(a4xb5 a6xb5 a1xa8 b7xa8 d2d3 e7c5 c1g5 h7h6 g5e3 c5xe3 e1xe3 d7d5) 0.02/9 24 (a4xb5 a6xb5 a1xa8 b7xa8 d2d3 e7c5 c1g5 h7h6 g5e3 c5xe3 e1xe3 d7d5) 0.02/9 24}
9... axb5 10. Rxa8
{(a1xa8 d8xa8 d2d3 b5b4 c1g5 h7h6 g5e3 f6g4 b1d2 g4xe3) 0.01/10 24 (a1xa8 d8xa8 d2d3 b5b4 c1g5 h7h6 g5e3 f6g4 b1d2 g4xe3) 0.01/10 24}
10... Qxa8 11. d3
{(d2d3 b5b4 b1d2 e7c5 d2c4 a8a7 c4e3 f8a8 c1d2) -0.06/10 24 (d2d3 b5b4 b1d2 e7c5 d2c4 a8a7 c4e3 f8a8 c1d2) -0.06/10 24}
11... b4 12. Nbd2
{(b1d2 e7c5 d2c4 a8a7 e1e2 c6d4 f3xd4 c5xd4 c1g5 d7d6) 0.04/9 34 (b1d2 e7c5 d2c4 a8a7 e1e2 c6d4 f3xd4 c5xd4 c1g5 d7d6) 0.04/9 34}
12... Bc5 13. Nc4
{(d2c4 d7d6 c1g5 a8c8 c4e3) 0.00/10 24 (d2c4 d7d6 c1g5 a8c8 c4e3) 0.00/10 24}
13... Qa7 14. Qe2
{(d1e2 d7d6 c1g5 f6h5 f3h4) 0.00/10 24 (d1e2 d7d6 c1g5 f6h5 f3h4) 0.00/10 24}
14... d6 15. Bg5
{(c1g5 f6h5 f3h4 h7h6 g5e3 h5f4 e3xf4 e5xf4 e2f3 g7g5) 0.09/9 24 (c1g5 f6h5 f3h4 h7h6 g5e3 h5f4 e3xf4 e5xf4 e2f3 g7g5) 0.09/9 24}
15... Nd7 16. c3
{(c2c3 h7h6 g5e3 f8a8 g1f1 d7f6 f3h4 c5xe3 c4xe3 a7c5) 0.02/9 25 (c2c3 h7h6 g5e3 f8a8 g1f1 d7f6 f3h4 c5xe3 c4xe3 a7c5) 0.02/9 25}
16... Ra8 17. Ncd2
{(c4d2 h7h6 g5h4 d7f8 b3d5 f8g6 c3xb4 c6xb4 d5xb7) 0.02/8 24 (c4d2 h7h6 g5h4 d7f8 b3d5 f8g6 c3xb4 c6xb4 d5xb7) 0.02/8 24}
17... h6 18. Be3
{(g5e3 c5xe3 f2xe3 a7a5 d2c4) 0.00/9 24 (g5e3 c5xe3 f2xe3 a7a5 d2c4) 0.00/9 24}
18... Bxe3 19. fxe3
{(f2xe3 b4xc3 b2xc3 c6a5 b3a4 d7f6 d2b3 a5xb3 a4xb3 a7c5 e1a1) 0.01/10 24 (f2xe3 b4xc3 b2xc3 c6a5 b3a4 d7f6 d2b3 a5xb3 a4xb3 a7c5 e1a1) 0.01/10 24}
19... Qa5 20. Rc1
{(e1c1 b4xc3 b2xc3 d7c5 b3d5 c5a4 c3c4 a4c3 e2f2) 0.06/9 24 (e1c1 b4xc3 b2xc3 d7c5 b3d5 c5a4 c3c4 a4c3 e2f2) 0.06/9 24}
20... bxc3 21. bxc3
{(b2xc3 d7c5 b3d5 a5a3 c1c2 a3a1+ d2f1 c6a5 c2b2 b7xd5) 0.02/9 28 (b2xc3 d7c5 b3d5 a5a3 c1c2 a3a1+ d2f1 c6a5 c2b2 b7xd5) 0.02/9 28}
21... Qa3 22. Rb1
{(c1b1 c6a5 d2c4 a5xc4 b3xc4 d7b6 c4b3 a3c5 e2d2 b7c6) 0.04/9 25 (c1b1 c6a5 d2c4 a5xc4 b3xc4 d7b6 c4b3 a3c5 e2d2 b7c6) 0.04/9 25}
22... Na5 23. Nc4
{(d2c4 a5xc4 b3xc4 d7b6 c4b3 a3c5 e2d2 b7c6 d3d4 e5xd4) 0.07/9 24 (d2c4 a5xc4 b3xc4 d7b6 c4b3 a3c5 e2d2 b7c6 d3d4 e5xd4) 0.07/9 24}
23... Nxc4 24. Bxc4
{(b3xc4 d7b6 c4b3 a3c5 e2d2 a8a3 d3d4 c5c6 d4d5) 0.05/10 24 (b3xc4 d7b6 c4b3 a3c5 e2d2 a8a3 d3d4 c5c6 d4d5) 0.05/10 24}
24... Bc6 25. Qe1
{(e2e1 d7b6 c4b3 c6a4 b3xa4 b6xa4 b1a1 a3b2 e1d1 a4b6) 0.00/9 30 (e2e1 d7b6 c4b3 c6a4 b3xa4 b6xa4 b1a1 a3b2 e1d1 a4b6) 0.00/9 30}
25... Nb6 26. Bb3
{(c4b3 c6a4 b3xa4 a8xa4 b1b5 a3a2 e1d1 a4a3 c3c4) -0.05/10 24 (c4b3 c6a4 b3xa4 a8xa4 b1b5 a3a2 e1d1 a4a3 c3c4) -0.05/10 24}
26... Ba4 27. Bxa4
{(b3xa4 a8xa4 f3h4 g7g6 e1d2 a3a2 d2d1) -0.03/10 24 (b3xa4 a8xa4 f3h4 g7g6 e1d2 a3a2 d2d1) -0.03/10 24}
27... Qxa4 28. Qc1
{(e1c1 a4a2 b1b2 a2e6 c1e1 a8a2 b2f2 a2xf2 e1xf2 b6c4) -0.06/10 24 (e1c1 a4a2 b1b2 a2e6 c1e1 a8a2 b2f2 a2xf2 e1xf2 b6c4) -0.06/10 24}
28... Nd7 29. Rb4
{(b1b4 a4c6 c1b2 d7c5 b4b8+ a8xb8 b2xb8+ g8h7 b8b1 c6a6 c3c4 a6c6) -0.04/10 27 (b1b4 a4c6 c1b2 d7c5 b4b8+ a8xb8 b2xb8+ g8h7 b8b1 c6a6 c3c4 a6c6) -0.04/10 27}
29... Qa2 30. Rb2
{(b4b2 a2a1 b2b1 a1a4) 0.00/10 25 (b4b2 a2a1 b2b1 a1a4) 0.00/10 25} 30... Qa1
31. Rb1 {(b2b1 a1a4) 0.00/11 24 (b2b1 a1a4) 0.00/11 24} 31... Qa7 32. d4
{(d3d4 a7a4 b1b4 a4a1 b4b1 a1a4) 0.00/10 26 (d3d4 a7a4 b1b4 a4a1 b4b1 a1a4) 0.00/10 26}
32... Qa2 33. Nd2
{(f3d2 d7b6 b1b2 a2e6 c3c4 a8a5) -0.09/9 25 (f3d2 d7b6 b1b2 a2e6 c3c4 a8a5) -0.09/9 25}
33... Nf6 34. h3
{(h2h3 a2e6 d4d5 e6d7 b1b7 d7c8 c1b2 a8a1+ b2xa1 c8xb7) -0.10/9 26 (h2h3 a2e6 d4d5 e6d7 b1b7 d7c8 c1b2 a8a1+ b2xa1 c8xb7) -0.10/9 26}
34... Qa6 35. c4
{(c3c4 a6c6 d4d5 c6d7 c4c5 d7a4 c5xd6 c7xd6 c1c6 a4a2) 0.00/10 25 (c3c4 a6c6 d4d5 c6d7 c4c5 d7a4 c5xd6 c7xd6 c1c6 a4a2) 0.00/10 25}
35... c5 36. Qb2
{(c1b2 e5xd4 e3xd4 c5xd4 b2xd4 a6a3 e4e5 d6xe5 d4xe5 a8e8 e5f5 a3g3) 0.00/10 25 (c1b2 e5xd4 e3xd4 c5xd4 b2xd4 a6a3 e4e5 d6xe5 d4xe5 a8e8 e5f5 a3g3) 0.00/10 25}
36... Qa3 37. Qxa3
{(b2xa3 a8xa3 d4xc5 d6xc5 b1b5 a3d3 d2f3 d3d1+ g1h2 f6xe4 f3xe5 d1f1) -0.17/11 25 (b2xa3 a8xa3 d4xc5 d6xc5 b1b5 a3d3 d2f3 d3d1+ g1h2 f6xe4 f3xe5 d1f1) -0.17/11 25}
37... Rxa3 38. Rb8+
{(b1b8+ g8h7 d4xc5 d6xc5 g1f2 a3d3 f2e2 d3a3 e2f2) 0.00/12 25 (b1b8+ g8h7 d4xc5 d6xc5 g1f2 a3d3 f2e2 d3a3 e2f2) 0.00/12 25}
38... Kh7 39. dxc5
{(d4xc5 a3a1+ b8b1 a1xb1+ d2xb1 d6xc5 b1d2 h7h8 d2f3 f6d7 g1f2 g7g5 g2g4 h8g8) -0.06/12 25 (d4xc5 a3a1+ b8b1 a1xb1+ d2xb1 d6xc5 b1d2 h7h8 d2f3 f6d7 g1f2 g7g5 g2g4 h8g8) -0.06/12 25}
39... dxc5 40. Kf2
{(g1f2 a3a2 f2e1 a2a1+ e1f2 a1c1 b8b7 h7g6 b7e7 c1c2 f2e1 c2c3) -0.13/12 26 (g1f2 a3a2 f2e1 a2a1+ e1f2 a1c1 b8b7 h7g6 b7e7 c1c2 f2e1 c2c3) -0.13/12 26}
40... Ra7 41. Rb2
{(b8b2 h7g8 b2b8+ g8h7) 0.00/12 21 (b8b2 h7g8 b2b8+ g8h7) 0.00/12 21} 41... Nd7
42. Nf3
{(d2f3 f7f6 g2g4 h7g8 h3h4 g8f7 h4h5 f7e7) -0.01/11 22 (d2f3 f7f6 g2g4 h7g8 h3h4 g8f7 h4h5 f7e7) -0.01/11 22}
42... Kg6 43. Nh4+
{(f3h4+ g6g5 g2g3 h6h5 h4f5 d7f6 f2f3 a7a4 f5d6 a4a7 d6f5) 0.00/11 22 (f3h4+ g6g5 g2g3 h6h5 h4f5 d7f6 f2f3 a7a4 f5d6 a4a7 d6f5) 0.00/11 22}
43... Kf6 44. Nf5 {(h4f5 f6g6 f5h4+) 0.00/12 22 (h4f5 f6g6 f5h4+) 0.00/12 22}
44... Nf8 45. g4
{(g2g4 f8e6 b2d2 e6g5 d2d6+ g5e6 d6d2) 0.00/11 23 (g2g4 f8e6 b2d2 e6g5 d2d6+ g5e6 d6d2) 0.00/11 23}
45... Ne6 46. Rd2
{(b2d2 e6g5 d2d6+ g5e6 d6d5 e6g5 d5d6+) 0.00/11 21 (b2d2 e6g5 d2d6+ g5e6 d6d5 e6g5 d5d6+) 0.00/11 21}
46... g6 47. Nd6
{(f5d6 a7a1 d2d5 a1a2+ f2g3 a2e2 g3f3 e2h2 f3g3 h2e2) 0.00/12 21 (f5d6 a7a1 d2d5 a1a2+ f2g3 a2e2 g3f3 e2h2 f3g3 h2e2) 0.00/12 21}
47... Ra8 48. h4
{(h3h4 d7a7 f2e2 a7a2+ d5d2 a2xd2+ e2xd2 f6e7 d6c8+ e7f6 c8d6) 0.00/11 22 (h3h4 d7a7 f2e2 a7a2+ d5d2 a2xd2+ e2xd2 f6e7 d6c8+ e7f6 c8d6) 0.00/11 22}
48... Ke7 49. Nb5 {(d6b5 a8a4 b5d6 a4a8) 0.00/12 30} 49... Ra1 50. Nd6
{(b5d6 a1a8) 0.00/11 17} 50... Rh1 51. Kg3
{(f2g3 h1g1+ g3h3 g1h1+ h3g3) 0.00/11 17} 51... Rg1+ 52. Kf3
{(g3f3 g1h1 f3g3) 0.00/12 17} 52... Rb1 53. Nc8+
{(d6c8+ e7f6 c8d6 f6e7) 0.00/10 17} 53... Ke8 54. Rd5
{(d2d5 b1h1 c8d6+ e8e7 f3g3 h1g1+ g3h3 g1h1+ h3g3) 0.00/10 17} 54... Rb8 55.
Nd6+ {(c8d6+ e8e7 d6b5 e7f6 f3g3 g6g5 h4xg5+ e6xg5 b5d6 b8b6) 0.00/12 17} 55...
Ke7 56. Nb5
{(d6b5 e7f6 f3f2 b8b7 b5d6 b7b2+ f2g3 b2b3 g3f3 g6g5 h4h5 e6d4+ f3g2) 0.03/11 19}
56... Ra8 57. Kg3 {(f3g3 a8a1 b5d6 a1g1+ g3h3 g1h1+ h3g3 h1g1+) 0.00/10 18}
57... Ra6 58. h5
{(h4h5 g6xh5 g4xh5 a6a1 d5xe5 a1g1+ g3h4 g1h1+ h4g3 h1e1 g3h4 e1h1+) 0.00/10 18}
58... Ra4 59. Nd6
{(b5d6 e6g5 g3h4 a4a1 h5xg6 f7xg6 d6b7 a1h1+ h4g3 h1g1+ g3h4 g5f3+ h4h3 f3g5+ h3h4) 0.00/11 17}
59... Ra3 60. Kf2 {(g3f2) 0.00/10 17} 60... Ra2+ 61. Kf1
{(f2f1 a2a1+ f1g2 a1a2+ g2g3 e6c7 h5xg6 c7xd5 d6f5+ e7e8 e4xd5 a2d2) 0.00/10 18}
61... Ng5 62. Nc8+
{(d6c8+ e7f6 h5xg6 f7xg6 d5d6+ g5e6 c8b6 h6h5 b6d5+ f6f7 d6d7+ f7f8 d7d6 f8f7) 0.00/10 19}
62... Kf6 63. hxg6
{(h5xg6 a2a1+ f1g2 f6xg6 d5xc5 a1a2+ g2h1 a2a1+ h1h2 a1a2+ h2h1) 0.00/10 17}
63... fxg6 64. Rd6+
{(d5d6+ g5e6 c8b6 h6h5 b6d5+ f6f7 d6d7+ f7f8 d5f6 h5xg4 f6xg4 a2a1+ f1g2 a1a2+ g2h1 a2a1+ h1g2) 0.00/11 17}
64... Kf7 65. Rd7+ {(d6d7+ f7e6 d7d6+ e6f7) 0.00/12 17} 65... Ke8 66. Rd5
{(d7d5 a2a1+ f1g2 e8f7 d5xe5 a1g1+ g2f2) 0.00/11 17} 66... Nf3 67. Nd6+
{(c8d6+ e8d7 d6b7+ d7c6 b7xc5 f3h2+ f1e1 h2xg4 c5d3 a2a4 d5c5+ c6b7 c5b5+ b7c8) -0.15/10 17}
67... Ke7 68. Nc8+ {(d6c8+ e7e6 d5d6+ e6f7 d6d7+ f7e6 d7d6+) 0.00/12 18} 68...
Kf6 69. Rxc5
{(d5xc5 f3h2+ f1e1 a2a1+ e1e2 h2xg4 c5c6+ f6g5 c8e7 a1a2+ e2e1 g4f6 c6e6 a2a5) -0.16/11 18}
69... Kg5 70. Ne7
{(c8e7 f3h2+ f1e1 a2a1+ e1e2 h2xg4 c5c6 a1a2+ e2e1 g4f6 c6e6 a2a1+ e1e2 a1a5) -0.12/11 18}
70... Kh4 71. Ra5
{(c5a5 a2xa5 g4g5 f3h2+ f1f2 a5a2+ f2e1 h2f3+ e1d1 a2a1+ d1e2 f3xg5) -5.39/11 44}
71... Rc2 72. Nf5+
{(e7f5+ g6xf5 a5a2 c2xa2 e4xf5 h4g3 g4g5 h6xg5 c4c5 a2f2+) -M5/10 28} 72... gxf5
73. gxf5 {(g4xf5 f3d2+ f1e2 d2xc4+ e2d3 c4xa5 d3xc2 h4g5) -3.03/10 6} 73... Kg3
74. Ra2 {(a5a2 c2xa2 c4c5 a2f2+) -M2/11 2} 74... Rxa2 75. f6
{(f5f6 a2f2+) -M1/11 1} 75... Rf2# {Mate} 0-1

[Andrew Fan]

Geschrieben von:/Posted by: Andrew Fan at 07 August 2004 00:00:01:
Als Antwort auf:/In reply to: Why Dragon-455 had been lunatic for a while? geschrieben von:/posted by: George at 06 August 2004 23:24:06:

How did you perform the "take back"?
I guess (may be wrong) that the hash table still holds information about previous searches.
Try setting up the same position right after loading the engine and see if different moves come up in the same amount of think time.
Andrew.

[George]

Geschrieben von:/Posted by: George at 07 August 2004 11:36:26:
Als Antwort auf:/In reply to: Re: Why Dragon-455 had been lunatic for a while? geschrieben von:/posted by: Andrew Fan at 07 August 2004 00:00:01:

How did you perform the "take back"?
Try setting up the same position right after loading the engine and see if different moves come up in the same amount of think time.
Andrew.

The game was played under Arena 0.95. So the first thought of pressing the
I guess (may be wrong) that the hash table still holds information about previous searches.
Now it plays 49.Nb5. In order not to become crazy i can only say that s... happens