Author: Dan Homan
Date: 12:57:36 06/13/99
Go up one level in this thread
On June 13, 1999 at 12:56:47, James Robertson wrote:
>On June 13, 1999 at 10:41:05, Dan Homan wrote:
>
>Could you post the critical moves in EPD? That way I can test my program much
>more easily.
>
>James
I think my program was in trouble before these moves; I was just
trying to show how the eval gave no hints of an impending mating
attack until it was too late. Here are the positions
with black to move just before EXchess sees the Mate:
after 31. Kd2
6rk/1b3p1p/p2r4/1p3PPR/4p1P1/2Pp4/PP1K1P2/3R1B2 b - - 0 31
whisper -0.14, 7 ply, nps: 85569, 31. ... Re8
after 32. Re1
4r2k/1b3p1p/p2r4/1p3PPR/4p1P1/2Pp4/PP1K1P2/4RB2 b - - 0 32
whisper -0.72, 7 ply, nps: 87430, 32. ... Bd5
after 33. Re3
4r2k/5p1p/p2r4/1p1b1PPR/4p1P1/2PpR3/PP1K1P2/5B2 b - - 0 33
whisper -1.30, 8 ply, nps: 81096, 33. ... Ba2
after 34. Reh3
4r2k/5p1p/p2r4/1p3PPR/4p1P1/2Pp3R/bP1K1P2/5B2 b - - 0 34
whisper MATE-(10) 9 ply, nps: 124059, 34. ... Kg8
- Dan
>
>>
>>Here is an interesting game played on ICC between my program, EXchess, on
>>a Cel/400 and "Talmoves" which is CS-Tal II on a PII/300. EXchess got
>>clobbered in this one, but I think it is an interesting King-Safety
>>example. I thought my King safety code was pretty good until this game.
>>When does your program realize it is in serious trouble (as black)?
>>
>>[Event "ICC 5 0"]
>>[Site "Internet Chess Club"]
>>[Date "1999.06.11"]
>>[Round "-"]
>>[White "Talmoves"]
>>[Black "EXchess"]
>>[Result "1-0"]
>>[WhiteElo "2367"]
>>[BlackElo "2506"]
>>[Opening "Sicilian: Pelikan, Chelyabinsk variation"]
>>[ECO "B45"]
>>[NIC "SI.37"]
>>[Time "22:41:15"]
>>
>>1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 d6 7. Bf4 e5 8.
>>Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 Bg7 12. c3 Ne7 13. Nxe7 Qxe7 14. Nc2
>>f5 15. exf5 O-O 16. Ne3 Bb7 17. Be2 Rad8 18. Nd5 Qg5 19. h4 Qh6 20. g4 Bf6
>>21. Nxf6+ Qxf6 22. Bf3 e4 23. Bg2 d5 24. Qd2 d4 25. Qg5+ Qxg5 26. hxg5 d3
>>27. Rh6 Rd7 28. Rd1 Kh8 29. Bf1 Rg8 30. Rh5 Rd6 31. Kd2 Re8 32. Re1 Bd5 33.
>>Re3 Bxa2 34. Reh3 Kg8 35. Rxh7 Kf8 36. f6 Rxf6 37. gxf6 e3+ 38. fxe3 Re6 39.
>>Rh8# {Black checkmated} 1-0
>>
>>Here are EXchess' evaluations during the critical part of the game:
>>
>>whisper -0.14, 7 ply, nps: 85569, 31. ... Re8
>>
>>whisper -0.72, 7 ply, nps: 87430, 32. ... Bd5
>>
>>whisper -1.30, 8 ply, nps: 81096, 33. ... Ba2
>>
>>whisper MATE-(10) 9 ply, nps: 124059, 34. ... Kg8
>>
>>MATE-(10) means mate in 10 ply (5 moves). EXchess thinks things are
>>getting about a pawn worse, but doesn't see major trouble until
>>suddenly seeing the mate. How do other programs do with these
>>positions? EXchess typically spent around 7 seconds per move in this
>>part of the game.
>>
>> - Dan
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