A (new?) bug in Zappa

[Guenther Simon]

In the following game from a current test tourney neither
SpiderChess nor Zappa claimed a draw with Kings only
on the board?
Instead after SpiderChess' last King move, Zappa echoed
its last move, which is an illegal move?
(the result will be corrected to a draw later of course)
Zappa played with 16MB tablebase cache and it was initialized
correctly. (Zappas log file saved too)

[Event "RWBC_Test28"]
[Site "ESPRESSO"]
[Date "2005.03.06"]
[Round "4"]
[Number "60"]
[White "Zappa_10"]
[Black "SpiderChess_363"]
[Result "0-1"]
[TimeControl "40/240"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nc6 5. c3 Bd6 6. Bd3 Nf6 7. O-O O-O
8. Re1 Bg4 9. Bg5 h6 10. Bh4 g5 11. Bg3 Bxg3 12. fxg3 Re8 13. Nbd2 Rxe1+
14. Qxe1 Bxf3 15. gxf3 Qd6 16. Qf2 Re8 17. Re1 Rxe1+ 18. Qxe1 Ne7 19. Nb3
b6 20. Qe5 Ne8 21. f4 f6 22. Qe3 Kf7 23. Qf3 Ng7 24. fxg5 hxg5 25. Na1 f5
26. Nc2 c5 27. dxc5 bxc5 28. Qf2 Kf6 29. Ne3 d4 30. Ng4+ Kg6 31. Qe2 dxc3
32. bxc3 Nd5 33. Ne5+ Kf6 34. Nc4 Qe6 35. Qf2 Qe7 36. Qd2 f4 37. Kg2 Qe6
38. Qf2 Qd7 39. Qxc5 Ne6 40. Qd6 Qxd6 41. Nxd6 Nxc3 42. Ne4+ Nxe4 43. Bxe4
Ke5 44. Bf3 Nd4 45. Kf2 Nf5 46. Bg4 fxg3+ 47. hxg3 Nd6 48. Kf3 Ne4 49. Bd7
a5 50. a3 Kd4 51. Bc6 Nf6 52. Bb7 Kc4 53. Bc6 Kc3 54. Ke3 Kb3 55. a4 Kc4
56. Kf3 Kb4 57. Ke3 Kc5 58. Bb5 Nd5+ 59. Kf3 Nc3 60. Be8 Kb4 61. Kg4 Nxa4
62. Kxg5 Nb2 63. g4 a4 64. Bxa4 Nxa4 65. Kf5 Kc5 66. g5 Kd6 67. Kg6 Nb6 68.
Kh7 Nd5 69. Kh8 Kc5 70. Kh7 Kb4 71. Kh8 Ne3 72. Kh7 Nf5 73. Kh8 Ka4 74. Kh7
Kb5 75. Kh8 Kb4 76. Kh7 Nd4 77. Kh8 Kb3 78. Kh7 Nf5 79. Kh8 Ka3 80. Kh7 Kb2
81. Kh8 Ka2 82. Kh7 Kb1 83. Kh8 Ka1 84. Kh7 Nh4 85. g6 Nxg6 86. Kxg6 Kb2
{Black wins on time} 0-1

Code: Select all

863241 <second: move h4g6
863241 >first : time 35759
otim 22298
863241 >first : usermove 863241 >first : h4g6
863341 <first : 1 73 1 5 1. Kh7xg6
863341 <first :
863341 <first : 2 0 1 10 1. Kh7xg6
863341 <first :
863341 <first : 3 0 1 16 1. Kh7xg6
863341 <first :
863341 <first : 4 0 1 34 1. Kh7xg6
863341 <first :
863341 <first : 5 0 1 51 1. Kh7xg6
863341 <first :
863341 <first : 6 0 1 53 1. Kh7xg6
863341 <first :
863341 <first : 6 0 1 71 1. Kh7xg6
863341 <first :
863341 <first : 7 0 1 73 1. Kh7xg6
863341 <first :
863341 <first : 7 0 1 92 1. Kh7xg6
863341 <first :
863341 <first : 8 0 1 94 1. Kh7xg6
863341 <first :
863341 <first : 8 0 1 124 1. Kh7xg6
863341 <first :
863341 <first : 9 0 1 126 1. Kh7xg6
863341 <first :
863341 <first : 9 0 1 157 1. Kh7xg6
863341 <first :
863341 <first : 10 0 1 159 1. Kh7xg6
863341 <first :
863341 <first : 10 0 1 198 1. Kh7xg6
863341 <first :
863341 <first : 11 0 1 200 1. Kh7xg6
863341 <first :
863341 <first : 11 0 1 241 1. Kh7xg6
863341 <first :
863341 <first : 12 0 1 243 1. Kh7xg6
863341 <first :
863341 <first : 12 0 1 327 1. Kh7xg6
863341 <first :
863341 <first : 13 0 1 329 1. Kh7xg6
863341 <first :
863341 <first : 13 0 1 429 1. Kh7xg6
863341 <first :
863341 <first : 14 0 1 431 1. Kh7xg6
863341 <first :
863341 <first : 14 0 1 457 1. Kh7xg6
863341 <first :
863341 <first : 15 0 1 459 1. Kh7xg6
863341 <first :
863341 <first : 15 0 1 485 1. Kh7xg6
863341 <first :
863341 <first : 16 0 1 487 1. Kh7xg6
863341 <first :
863341 <first : 16 0 1 513 1. Kh7xg6
863341 <first :
863341 <first : 17 0 1 515 1. Kh7xg6
863341 <first :
863341 <first : 17 0 1 541 1. Kh7xg6
863341 <first :
863341 <first : 18 0 1 543 1. Kh7xg6
863341 <first :
863341 <first : 18 0 1 569 1. Kh7xg6
863341 <first :
863341 <first : 19 0 1 571 1. Kh7xg6
863341 <first :
863341 <first : 19 0 1 597 1. Kh7xg6
863341 <first :
863341 <first : 20 0 1 599 1. Kh7xg6
863341 <first :
863341 <first : 20 0 1 625 1. Kh7xg6
863341 <first :
863341 <first : 21 0 1 627 1. Kh7xg6
863341 <first :
863341 <first : 21 0 1 653 1. Kh7xg6
863341 <first :
863341 <first : 22 0 1 655 1. Kh7xg6
863341 <first :
863341 <first : 22 0 1 681 1. Kh7xg6
863341 <first :
863341 <first : 23 0 1 683 1. Kh7xg6
863341 <first :
863341 <first : 23 0 1 709 1. Kh7xg6
863341 <first :
863341 <first : 24 0 1 711 1. Kh7xg6
863341 <first :
863341 <first : 24 0 1 737 1. Kh7xg6
863341 <first :
863341 <first : 25 0 1 739 1. Kh7xg6
863341 <first :
863341 <first : 25 0 1 765 1. Kh7xg6
863341 <first :
863341 <first : 26 0 1 767 1. Kh7xg6
863341 <first :
863341 <first : 26 0 1 793 1. Kh7xg6
863341 <first :
863341 <first : 27 0 1 795 1. Kh7xg6
863341 <first :
863341 <first : 27 0 1 821 1. Kh7xg6
863341 <first :
863341 <first : 28 0 1 823 1. Kh7xg6
863341 <first :
863341 <first : 28 0 1 849 1. Kh7xg6
863341 <first :
863341 <first : 29 0 1 851 1. Kh7xg6
863341 <first :
863341 <first : 29 0 1 877 1. Kh7xg6
863341 <first :
863341 <first : 30 0 1 879 1. Kh7xg6
863341 <first :
863341 <first : 30 0 1 905 1. Kh7xg6
863341 <first :
863341 <first : 31 0 1 907 1. Kh7xg6
863341 <first :
863341 <first : 31 0 1 933 1. Kh7xg6
863341 <first :
863341 <first : 32 0 1 935 1. Kh7xg6
863341 <first :
863341 <first : 32 0 1 961 1. Kh7xg6
863341 <first :
863341 <first : 33 0 1 963 1. Kh7xg6
863341 <first :
863341 <first : 33 0 1 989 1. Kh7xg6
863341 <first :
863341 <first : 34 0 1 991 1. Kh7xg6
863341 <first :
863341 <first : 34 0 1 1017 1. Kh7xg6
863341 <first :
863341 <first : 35 0 1 1019 1. Kh7xg6
863341 <first :
863341 <first : 35 0 1 1045 1. Kh7xg6
863341 <first :
863341 <first : 36 0 1 1047 1. Kh7xg6
863341 <first :
863341 <first : 36 0 1 1079 1. Kh7xg6
863341 <first :
863341 <first : 37 0 1 1081 1. Kh7xg6
863341 <first :
863341 <first : 37 0 1 1113 1. Kh7xg6
863341 <first :
863341 <first : 38 0 1 1115 1. Kh7xg6
863341 <first :
863341 <first : 38 0 1 1147 1. Kh7xg6
863351 <first :
863351 <first : 39 0 1 1149 1. Kh7xg6
863351 <first :
863351 <first : 39 0 1 1181 1. Kh7xg6
863351 <first :
863351 <first : 40 0 1 1183 1. Kh7xg6
863351 <first :
863351 <first : 40 0 1 1215 1. Kh7xg6
863351 <first :
863351 <first : 41 0 1 1217 1. Kh7xg6
863351 <first :
863351 <first : 41 0 1 1249 1. Kh7xg6
863351 <first :
863351 <first : 42 0 1 1251 1. Kh7xg6
863351 <first :
863351 <first : 42 0 1 1283 1. Kh7xg6
863351 <first :
863351 <first : 43 0 1 1285 1. Kh7xg6
863351 <first :
863351 <first : 43 0 1 1317 1. Kh7xg6
863351 <first :
863351 <first : 44 0 1 1319 1. Kh7xg6
863351 <first :
863351 <first : 44 0 1 1351 1. Kh7xg6
863351 <first :
863351 <first : 45 0 1 1353 1. Kh7xg6
863351 <first :
863351 <first : 45 0 1 1385 1. Kh7xg6
863351 <first :
863351 <first : 46 0 1 1387 1. Kh7xg6
863351 <first :
863351 <first : 46 0 1 1419 1. Kh7xg6
863351 <first :
863351 <first : 47 0 1 1421 1. Kh7xg6
863351 <first :
863351 <first : 47 0 1 1453 1. Kh7xg6
863351 <first :
863351 <first : 48 0 1 1455 1. Kh7xg6
863351 <first :
863351 <first : 48 0 1 1487 1. Kh7xg6
863351 <first :
863351 <first : 49 0 1 1489 1. Kh7xg6
863351 <first :
863351 <first : 49 0 1 1521 1. Kh7xg6
863351 <first :
863351 <first : 50 0 1 1523 1. Kh7xg6
863351 <first :
863351 <first : 50 0 1 1555 1. Kh7xg6
863351 <first :
863351 <first : 51 0 1 1557 1. Kh7xg6
863351 <first :
863351 <first : 51 0 1 1589 1. Kh7xg6
863351 <first :
863351 <first : 52 0 1 1591 1. Kh7xg6
863351 <first :
863351 <first : 52 0 1 1623 1. Kh7xg6
863351 <first :
863351 <first : 53 0 1 1625 1. Kh7xg6
863351 <first :
863351 <first : 53 0 1 1657 1. Kh7xg6
863351 <first :
863351 <first : 54 0 1 1659 1. Kh7xg6
863351 <first :
863351 <first : 54 0 1 1691 1. Kh7xg6
863351 <first :
863351 <first : 55 0 1 1693 1. Kh7xg6
863351 <first :
863351 <first : 55 0 1 1725 1. Kh7xg6
863351 <first :
863351 <first : 56 0 1 1727 1. Kh7xg6
863351 <first :
863351 <first : 56 0 1 1759 1. Kh7xg6
863351 <first :
863351 <first : 57 0 1 1761 1. Kh7xg6
863351 <first :
863351 <first : 57 0 1 1793 1. Kh7xg6
863351 <first :
863351 <first : 58 0 1 1795 1. Kh7xg6
863351 <first :
863351 <first : 58 0 1 1827 1. Kh7xg6
863351 <first :
863351 <first : 59 0 1 1829 1. Kh7xg6
863351 <first :
863351 <first : 59 0 1 1861 1. Kh7xg6
863351 <first :
863351 <first : 60 0 1 1863 1. Kh7xg6
863351 <first :
863351 <first : 60 0 1 1895 1. Kh7xg6
863351 <first :
863351 <first : 61 0 1 1897 1. Kh7xg6
863351 <first :
863351 <first : 61 0 2 1929 1. Kh7xg6
863351 <first :
863351 <first : 62 0 2 1931 1. Kh7xg6
863351 <first :
863351 <first : 62 0 2 1963 1. Kh7xg6
863351 <first :
863351 <first : 63 0 2 1965 1. Kh7xg6
863351 <first :
863351 <first : 63 0 2 1997 1. Kh7xg6
863351 <first :
863351 <first : tellicsnoalias kibitz Score: 0.00 Depth: 63 (33 knps) 1. Kh7xg6
863351 <first : move h7g6
863351 >second: time 22298
otim 35748
863351 >second: usermove 863351 >second: h7g6
863371 <second: 6 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7             
863371 <second: 7 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4       
863371 <second: 8 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 9 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 10 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 11 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 12 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 13 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 14 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 15 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 16 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 17 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 18 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863371 <second: 19 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863381 <second: 20 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863381 <second: 21 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863381 <second: 22 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863381 <second: 23 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863481 <second: 24 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863581 <second: 25 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863681 <second: 26 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863792 <second: 27 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863872 <second: 28 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
863982 <second: 29 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864082 <second: 30 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864182 <second: 31 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864272 <second: 32 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864382 <second: 33 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864473 <second: 34 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864563 <second: 35 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864663 <second: 36 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864773 <second: 37 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864883 <second: 38 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
864973 <second: 39 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865073 <second: 40 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865174 <second: 41 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865274 <second: 42 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865364 <second: 43 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865464 <second: 44 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865554 <second: 45 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865664 <second: 46 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865754 <second: 47 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865845 <second: 48 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
865955 <second: 49 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
866045 <second: 50 +1 0 0 a1-b2 g6-f7 b2-c2 f7-e7 c2-d3 e7-d7 d3-d4 d7-c7
866045 <second: move a1b2
866045 >first : time 35748
otim 22028
866045 >first : usermove 866045 >first : a1b2
866145 <first : 1 0 1 1
866145 <first :
866145 <first : 2 0 1 2
866145 <first :
866145 <first : 3 0 1 3
866145 <first :
866145 <first : 4 0 1 4
866145 <first :
866145 <first : 5 0 1 5
866145 <first :
866145 <first : 6 0 1 6
866145 <first :
866145 <first : 7 0 1 7
866145 <first :
866145 <first : 8 0 1 8
866145 <first :
866145 <first : 9 0 1 9
866145 <first :
866145 <first : 10 0 1 10
866145 <first :
866145 <first : 11 0 1 11
866145 <first :
866145 <first : 12 0 1 12
866145 <first :
866145 <first : 13 0 1 13
866145 <first :
866145 <first : 14 0 1 14
866145 <first :
866145 <first : 15 0 1 15
866145 <first :
866145 <first : 16 0 1 16
866145 <first :
866145 <first : 17 0 1 17
866145 <first :
866145 <first : 18 0 1 18
866145 <first :
866145 <first : 19 0 1 19
866145 <first :
866145 <first : 20 0 1 20
866145 <first :
866145 <first : 21 0 1 21
866145 <first :
866145 <first : 22 0 1 22
866145 <first :
866145 <first : 23 0 1 23
866145 <first :
866145 <first : 24 0 1 24
866145 <first :
866145 <first : 25 0 1 25
866145 <first :
866145 <first : 26 0 1 26
866145 <first :
866145 <first : 27 0 1 27
866145 <first :
866145 <first : 28 0 1 28
866145 <first :
866145 <first : 29 0 1 29
866145 <first :
866145 <first : 30 0 1 30
866145 <first :
866145 <first : 31 0 1 31
866145 <first :
866145 <first : 32 0 1 32
866145 <first :
866145 <first : 33 0 1 33
866145 <first :
866145 <first : 34 0 1 34
866145 <first :
866145 <first : 35 0 1 35
866145 <first :
866145 <first : 36 0 1 36
866145 <first :
866145 <first : 37 0 1 37
866145 <first :
866145 <first : 38 0 1 38
866145 <first :
866145 <first : 39 0 1 39
866145 <first :
866145 <first : 40 0 1 40
866145 <first :
866145 <first : 41 0 1 41
866145 <first :
866145 <first : 42 0 1 42
866145 <first :
866145 <first : 43 0 1 43
866145 <first :
866145 <first : 44 0 1 44
866145 <first :
866145 <first : 45 0 1 45
866145 <first :
866145 <first : 46 0 1 46
866145 <first :
866145 <first : 47 0 1 47
866145 <first :
866145 <first : 48 0 1 48
866145 <first :
866145 <first : 49 0 1 49
866145 <first :
866145 <first : 50 0 1 50
866145 <first :
866145 <first : 51 0 1 51
866145 <first :
866145 <first : 52 0 1 52
866145 <first :
866145 <first : 53 0 1 53
866145 <first :
866145 <first : 54 0 1 54
866145 <first :
866145 <first : 55 0 1 55
866145 <first :
866145 <first : 56 0 1 56
866145 <first :
866145 <first : 57 0 1 57
866145 <first :
866145 <first : 58 0 1 58
866145 <first :
866145 <first : 59 0 1 59
866145 <first :
866145 <first : 60 0 1 60
866145 <first :
866145 <first : 61 0 1 61
866145 <first :
866145 <first : 62 0 1 62
866145 <first :
866145 <first : 63 0 1 63
866145 <first :
866145 <first : tellicsnoalias kibitz Score: 0.00 Depth: 35 (0 knps) 1. Kh7xg6
866145 <first : move h7g6
866145 >second: time 22028
otim 35738
866145 >second: usermove 866145 >second: h7g6
866155 <second: Illegal move: H7G6
GameEnds(32, Black wins on time, 4)
1223539 >first : result 0-1 {Black wins on time}
1223539 >second: result 0-1 {Black wins on time}
1223539 >first : force
1223539 >first : ping 2
1223539 >second: quit
Exiting: Match Zappa vs. SpiderChess 3.63: final score 0-1-0

[Greg Simpson]

I have also seen Zappa fail when a game got to king vs king. In my case it crashed and the log files were incomplete, but it also showed searches up to depth 63. I had table bases disabled, and Zappa was playing another copy of itself.

[Martin Giepmans]

Hi Guenther,

Spiderchess never claims a draw when there is insufficient material.
It's not implemented ...
Till now it was always the other program (or the GUI or ICC) that took care of it but Zappa is apparently an exception.

Should it be implemented when the engine plays in your tournament?

[Anthony Cozzie]

I'll go ahead and add draw claim by insufficient material. The problem is that in the search Zappa knows this (it immediately stops the search) but it never actually claims the draw

63 btw is Zappa's max depth, which is why it appears when Zappa is in tablebases or opening book.

anthony

[Guenther Simon]

I'll go ahead and add draw claim by insufficient material. The problem is that in the search Zappa knows this (it immediately stops the search) but it never actually claims the draw Wink

Thanks Anthony that would be fine.

BTW it seems I have found another small bug meanwhile:
If I set up Zappa for analysis at least in WB, its time management
does not work correctly for very slow time controls?
E.g. sometimes I set 40/3000 or may be 5 hours for the whole game,
just to simulate long analysis and here I noticed that Zappa will
move almost immediately if a tc is set up higher than around 2.5 hours?

Another much worser one was, that I have experienced the tablebase
bug meanwhile, also with a 16MB tablebase cache in one or may be
even two games. (First one was a rook blunder in a drawn position,
second one missed a win - interesting position BTW)

[diag]3N4/2p3K1/8/2p5/2P1k3/8/8/8 w - - 0 50[/diag]
3N4/2p3K1/8/2p5/2P1k3/8/8/8 w - - 0 50
Zappa played Ne6? here with tablebases, which draws immediately,
as the last pawn falls - IIRC it will play the right Nc6, which
wins in a nice way, without tablebases.

Despite the loss of 2 half points Zappa shared place 1 in my last
test tourney before Class B starts.

(Results + table later)

I guess I should disable tablebases at all now, as long the bug
is not fixed?

Best regards,
Guenther

[Guenther Simon]

Hi Guenther,

Spiderchess never claims a draw when there is insufficient material.
It's not implemented ...
Till now it was always the other program (or the GUI or ICC) that took care of it but Zappa is apparently an exception. Very Happy

Should it be implemented when the engine plays in your tournament?

Hi Martin,

I would appreciate it, if it is not too much work for you?
BTW Spider was a real draw master in the test tourney:
9 draws out of 17

Best,
Guenther

[Martin Giepmans]

Hi Guenther,

It turns out that it is not so easy to add this draw claim.
Reason: extremely messy code!
So perhaps I will not be able to fix it soon, I hope that is not a problem.

Draw master - yeah, it's apparently a side effect of the pruning that I use.
As yet no idea what to do about it ...

[Anthony Cozzie]

I sent an update to volker; whenver he gets around to updating we'll see how the new version works. It should work in Fritz too now.

[Volker Pittlik]

I sent an update to volker; whenver he gets around to updating we'll see how the new version works. It should work in Fritz too now.

I'm going to update it tomorrow morning. I'm recovering. BTW: your e-mail is still bouncing.

Volker

[Anthony Cozzie]

I'm not putting any pressure on you. To be honest, the only reason I posted it was that I was curious if the board was down or something, because there weren't any posts at all for a solid 12 hours

Verizon does superfiltering I guess. I never get any spam, but they seem to filter out a ton of stuff. I need to get a gmail account.

anthony

[Mike Scheidl]

May I suggest to assign version no. 1.1 (or 1.01) to the most recent version, as soon as it has been successfully tested on all CPUs and with different tbs. cache sizes and in several GUIs?

[Volker Pittlik]

I'm not putting any pressure on you. To be honest, the only reason I posted it was that I was curious if the board was down or something, because there weren't any posts at all for a solid 12 hours

There seems to be an error. It seems my provider changed something at the server setup and the cookie doesn't work properly any more.
I changed the configuration of the forum software. It should work now again. If unread message still indicated as read, please display the cookies saved on your computer (how to do that depends on your browser) and delete all beginning with "wbforum040924*".

Verizon does superfiltering I guess. I never get any spam, but they seem to filter out a ton of stuff. I need to get a gmail account.

anthony

Not the worst idea. Unfortunately I can't invite anyone.

Volker
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