Author: Dieter Buerssner
Date: 13:35:30 07/31/02
Go up one level in this thread
On July 31, 2002 at 08:11:26, Uri Blass wrote:
>Here is one game of the match and
>a nice test position.
Thanks for pointing this out.
>Movei used a very small book
>(I wrote all the moves manually)
>and it found itself out of book at move 4.
>
>[Event "Computer chess game 0 1800 +5 0 0"]
>[Site "?"]
>[Date "2002.07.29"]
>[Round "19"]
>[White "movei00_74"]
>[Black "Yace 0.99.72"]
>[Result "1-0"]
>[WhiteElo "0"]
>[BlackElo "0"]
>[ECO "D20"]
>[Opening "QGA"]
>[Variation "3.e4"]
>[Timecontrol "0 1800 +5 0 0"]
>[Time "Mon Jul 29 06:59:29 2002"]
>[last_book_move "6...Nc6"]
>[LogFile "logs\yace0107.log"]
>
>1. d4 {0.00s} d5 {0.00s} 2. c4 {0.01s} dxc4 {0.00s} 3. e4 {0.01s} Nf6 {0.06s}
>4. e5 {95.99s} Nd5 {0.31s} 5. Bxc4 {63.27s} Nb6 {0.06s} 6. Bd3 {40.24s} Nc6
>{0.11s} 7. Nf3 {67.47s} Be6 {-0.28/11 81.70s} 8. Nc3 {56.84s} (8. O-O) 8...Qd7
>{-0.35/10 51.51s} 9. O-O {62.05s} (9. Be3) 9...O-O-O {-0.27/10 85.65s} 10. Be3
>{69.20s} Nc4 {-0.37/9 71.72s} 11. Na4 {87.13s} (11. Be4) 11...Bd5
>{-0.24/10 45.98s} 12. Nc5 {42.12s} (12. Rc1) 12...Qg4 {0.07/10 39.52s} 13.
>Bxc4 {34.52s} Bxc4 {-0.16/10 37.51s} 14. h3 {37.70s} (14. Rc1) 14...Qh5
>{-0.19/10 46.23s} 15. Qa4 {29.00s} Bxf1 {-0.33/10 44.43s} 16. Rxf1 {45.85s} a6
^^
>{-0.73/11 39.76s} 17. Rc1 {37.27s} Nb8 {-2.49/11 214.71s} 18. Qa5 {36.48s} c6
>{-7.02/11 184.75s} 19. e6 {19.79s} Qxc5 {-7.16/11 18.12s} 20. dxc5 {44.87s}
>fxe6 {-10.90/14 83.89s} 21. Bf4 {24.58s} Rd7 {-10.90/13 29.18s} 22. Ne5
>{59.92s} g5 {-11.55/13 36.44s} 23. Nxd7 {25.49s} (23. Bg3) 23...gxf4
>{-12.37/15 32.63s} 24. Nb6+ {29.37s} Kd8 {-M08/15 27.73s} 25. Qe1 {28.10s} Rg8
>{-M07/14 7.61s} 1-0 {Black resigns}
>
>The test position is to find 15...Bd5 that is the
>only chance for black(Yace failed to find the move
>in the game and movei also failed to expect
>that move when it sacrificed the rook by 15.Qa4).
I tried various versions of Yace, including the one Peter used. They found Bd1
mostly at depth 10, sometimes at depth 9. In one test it was found at depth 9,
switched again to Bxf1 at depth 10, and after fail low, found again at depth 11.
The time was from about 1 minute to about 13 minutes on K6-2 475 (in the later
case the fail low was much earlier). Interestingly, the version Peter used,
found it at depth 10. The above PGN is written by Yace. The depth reported,
means, that this depth was calculated to end - so obviously in the real game
depth 10 was not enough.
Regards,
Dieter
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