Author: Dann Corbit
Date: 16:07:12 01/19/01
Go up one level in this thread
On January 19, 2001 at 18:30:14, Dann Corbit wrote:
>On January 19, 2001 at 15:31:11, Thomas Lagershausen wrote:
>
>>In the following game white has a winning knightsacrifice after the important
>>pawnmoves 15.b4! and 16.b5!.Is a program able to find the plan?
>>
>>[Event "40/120"]
>>[Site "?"]
>>[Date "1992.11.25"]
>>[Round "4"]
>>[White "Lagershausen"]
>>[Black "Fidelity Avantgard#6"]
>>[ECO "A21"]
>>[Result "1-0"]
>>
>>1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 Bg4 5. d5 Nce7 6. e4
>>Ng6 7. Be2 Nf4 8. Bxf4 exf4 9. Nd4 Bd7 10. Bg4 Ne7 11. O-O
>>Qc8 12. Bxd7+ Qxd7 13. Qb3 O-O-O 14. Qa3 Kb8 15. b4 g6
>>16. b5 Bg7 17. Nc6+ bxc6 18. bxc6 Nxc6 19. Rab1+ Ka8
>>20. Nb5 Bd4 21. dxc6 Qxc6 22. Nxd4 Qd7 23. Qa6 c5 24. Nb5
>>Rb8 25. Nc3 f5 26. Nd5 fxe4 27. Nb6+ Rxb6 28. Rxb6 Qc8
>>29. Qa4 Qe8 30. Qxe8+ Rxe8 31. Rxd6 1-0
>
>Here is the position in question:
>[D]1k1r1b1r/pppqnppp/3p4/3P4/2PNPp2/Q1N5/PP3PPP/R4RK1 w - - bm b4;
Crafty would pick b4 on a fast machine at tournament time controls:
White(1): epdpfga langer.epd langer.out
PFGA: EPD record: 1 ID: Lagershausen/Fidelity Avantgard#6
middle-game phase
clearing hash tables
time surplus 0.00 time limit 10:00 (10:00)
nss depth time score variation (1)
6-> 0.28 0.33 1. Qb4 a6 2. c5 dxc5 3. Qxc5 Nf5 4.
Qc4 Nxd4 5. Qxd4
7 0.65 0.35 1. Qb4 a6 2. Nce2 g5 3. c5 Bg7 4. cxd6
Qxd6
7-> 0.80 0.35 1. Qb4 a6 2. Nce2 g5 3. c5 Bg7 4. cxd6
Qxd6
8 1.96 0.34 1. Qb4 Ka8 2. Nb3 b6 3. Nd4 a6 4. h3
Re8
8-> 2.31 0.34 1. Qb4 Ka8 2. Nb3 b6 3. Nd4 a6 4. h3
Re8
9 9.13 0.35 1. Qb4 g5 2. Rad1 Bg7 3. c5 dxc5 4.
Qxc5 Qd6 5. Qc4 c6
9 11.19 0.40 1. c5 dxc5 2. Qxc5 Ng6 3. Qa5 Ne5 4.
Nce2 b6 5. Qd2 g5
9-> 13.05 0.40 1. c5 dxc5 2. Qxc5 Ng6 3. Qa5 Ne5 4.
Nce2 b6 5. Qd2 g5
10 16.77 0.41 1. c5 dxc5 2. Qxc5 Nf5 3. Qc4 Nxd4
4. Qxd4 f6 5. Rac1 Bd6 6. Qc4 Rhe8
10-> 22.24 0.41 1. c5 dxc5 2. Qxc5 Nf5 3. Qc4 Nxd4
4. Qxd4 f6 5. Rac1 Bd6 6. Qc4 Rhe8
11 34.10 0.46 1. c5 dxc5 2. Qxc5 Ng6 3. Qa5 Ne5 4.
Nce2 Re8 5. f3 Nc4 6. Qb5 Qxb5 7. Nxb5
11-> 54.39 0.46 1. c5 dxc5 2. Qxc5 Ng6 3. Qa5 Ne5 4.
Nce2 Re8 5. f3 Nc4 6. Qb5 Qxb5 7. Nxb5
12 1:21 0.42 1. c5 dxc5 2. Qxc5 Nf5 3. Qc4 Nxd4
4. Qxd4 f6 5. Rac1 Bd6 6. Qc4 Qe7 7.
Nb5 Rhe8
12 4:01 0.48 1. b4 g5 2. c5 Bg7 3. Rad1 dxc5 4.
bxc5 h5 5. Ndb5 a6 6. c6 Qe8 7. Nd4
bxc6
12-> 4:01 0.48 1. b4 g5 2. c5 Bg7 3. Rad1 dxc5 4.
bxc5 h5 5. Ndb5 a6 6. c6 Qe8 7. Nd4
bxc6
13 6:07 0.50 1. b4 g5 2. c5 Bg7 3. Rad1 dxc5 4.
bxc5 Rhe8 5. Ndb5 Nc8 6. Rb1 Bxc3 7.
Nxc3 Qe7 8. f3
time=10:00 cpu=99% mat=0 n=302680686 fh=90% nps=503921
ext-> checks=8052498 recaps=1263023 pawns=577039 1rep=988288
thrt:83432
predicted=0 nodes=302680686 evals=74756074
endgame tablebase-> probes done=0 successful=0
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