Author: Andrew Williams
Date: 12:58:27 05/01/01
Go up one level in this thread
On May 01, 2001 at 00:34:51, Jon Dart wrote:
>
>Here is a recent game played by Arasan against BK-Chess. The finger
>notes say this is Shredder on a fast Pentium.
>
>[Event "?"]
>[Site "chessclub.com"]
>[Date "2001.04.29"]
>[Round "?"]
>[White "BK-Chess"]
>[Black "Arasan 6.0"]
>[Result "1-0"]
>[ECO "A00"]
>[WhiteElo "2640"]
>[BlackElo "2455"]
>[TimeControl "300+3"]
>
>1. b4 e5 2. Bb2 Bxb4 3. f4 Qh4+ 4. g3 Qh6 5. fxe5 Qb6 6. Bc3 Bxc3
>7. Nxc3 Qc5 8. Nf3 Nc6 9. e3 Nxe5 10. Bg2 Nf6 11. O-O O-O 12. Nd4 d6
>13. Rxf6 gxf6 14. Ne4 Qb6 15. Nxf6+ Kg7 16. Qf1 c5 17. Nh5+ Kh6
>18. Qf6+ Kxh5 19. Nf3 Qd8 20. Qg7 Ng4 21. h3 Nh6
> 1-0 {ArasanX resigns}
>
>The winning attack here is quite human-like: White ignores
>material and goes for the kill. I was impressed, especially
>given that this was a fast blitz game.
>
>The first interesting point is the sac on move 15:
Actually, it's move 13.
>
>[D] r1b2rk1/ppp2ppp/3p1n2/2q1n3/3N4/2N1P1P1/P1PP2BP/R2Q1RK1 w - -
>
>Crafty prefers Nb3, even after 10 minutes and over
>250 million positions.
>
PostModernist gets this in 586 seconds on an Athlon 1200:
10= -104 19 3365269 1. Rb1 c6 2. Nb3 Qc4 3. Qe1 Re8 4. Na5 Qa6 5. Nb3
11> -109 48 8479180 1. Qe1 Nc4 2. Rf4 Nb6 3. Ne4 Nxe4 4. Bxe4 d5 5. Bg2
11b -108 63 11120332 1. Qe2 Bg4 2. Qf2 c6 3. Rab1 Rfb8 4. Ne4 Nxe4 5.
Bxe4 f6 6. d3
11= -108 69 12167575 1. Qe2 Bg4 2. Qf2 c6 3. Rab1 Rfb8 4. Ne4 Nxe4 5.
Bxe4 f6 6. d3
12> -113 261 44258536 1. Qe2 c6 2. Rxf6 gxf6 3. Ne4 Qb6 4. Nxf6
12= -109 268 45692332 1. Qe2 c6 2. Rxf6 gxf6 3. Ne4 Qb6 4. Nxf6
13> -109 364 62287641 1. Qe2 c6 2. Rxf6 gxf6 3. Ne4 Qb6 4. Nxf6
13b -108 586 99582132 1. Rxf6 gxf6 2. Nd5 Kg7 3. Qf1 f5 4. Nxf5 Kh8 5.
Nfe7
13= -97 696 119085262 1. Rxf6 gxf6 2. Nd5 Kg7 3. Qf1 f5 4. Nxf5 Bxf5 5.
Qxf5 Ng6 6. d4 Qc4 7. Nf6 Qe6
14> -102 1291 219294585 1. Rxf6 gxf6 2. Ne4 Qa5 3. Nxf6 Kg7 4. Nh5 Kh8 5.
Nf6 Ng6 6. Bd5 c5 7. Qh5
14= -98 1300 221072787 1. Rxf6 gxf6 2. Ne4 Qa5 3. Nxf6 Kg7 4. Nh5 Kh8 5.
Nf6 Ng6 6. Bd5 c5 7. Qh5
15> -98 1357 231873540 1. Rxf6 gxf6 2. Ne4 Qa5 3. Nxf6 Kg7 4. Nh5 Kh8 5.
Nf6 Ng6 6. Bd5 c5 7. Qh5
NODES per second 168000
>17. Nh5+ is also hard for many programs to find:
>
>[D] r1b2r2/pp3pkp/1q1p1N2/2p1n3/3N4/4P1P1/P1PP2BP/R4QK1 w - c6
>
>Crafty selects Nh5+ after 3 1/2 minutes on a Pentium III/733,
>although the score is still only 0.
>
PostModernist gets this one in 27 seconds on the Athlon 1200. After three
minutes it had generated a new guess of 0 and was trying to establish if
the score was above or below that:
8= -108 2 528056 1. Nb5 Be6 2. Ne4 d5 3. Qf6 Kg8 4. Ned6 Nc4
9> -108 4 723869 1. Nb5 Be6 2. Be4 Bc4 3. Nh5 Kg8 4. Qf6 Bxb5 5. Qg7
9= -85 13 2329406 1. Nb5 Ng6 2. c4 Be6 3. Nh5 Kh6 4. Nf6 a6 5. Nc3
10> -100 27 5183777 1. Nh5 Kh6 2. Nf6 Qd8 3. Qf4 Kg7 4. Qg5 Ng6 5. Nh5
Kh8 6. Qh6 Rg8 7. Nf3
10= -91 28 5265216 1. Nh5 Kh6 2. Nf6 Qd8 3. Qf4 Kg7 4. Qg5 Ng6 5. Nh5
Kh8 6. Qh6 Rg8 7. Nb3
11> -91 41 7504475 1. Nh5 Kh6 2. Qf6 Kxh5 3. Ne2 Ng6 4. Qg7 Bg4 5. Nf4
Nxf4 6. Qxh7 Kg5 7. exf4 Kf6 8. Qh6
SCRUBBING TT (on new guess): -171 [0] -11
NODES per second 178100
>18. Qf6+ is also somewhat difficult, although this probably
>wouldn't be hard for a human to play:
>
>[D] r1b2r2/pp3p1p/1q1p3k/2p1n2N/3N4/4P1P1/P1PP2BP/R4QK1 w - -
>
>Qf6+ takes Crafty 1:40 to find. Arasan doesn't find it at all
>in over 5 minutes. Shredder played it in this game in
>maybe 10 seconds (I don't have the exact time).
>
>--Jon
PostModernist can't make up its mind for a long while here. It settles on
Qf6 after 35 seconds and sticks with it up to 3 minutes:
7= -251 1 236403 1. Rb1 Qa5 2. Nb3 Qxa2 3. Qd1 Bg4
8> -251 3 551747 1. Qf6 Kxh5 2. Ne2 Ng6 3. Bf3 Kh6 4. g4 Qd8 5. g5
SCRUBBING TT (on new guess): -331 [-157] -171
8= -154 5 994868 1. Qf6 Kxh5 2. Ne2 Ng6 3. Qg7 Rh8 4. Bf3 Bg4 5. Bxg4
Kxg4 6. Qxf7
9> -154 6 1122027 1. Qf6 Kxh5 2. Nf3 Qd8 3. Qg7 Bf5 4. Nxe5 dxe5 5.
Bf3
9b -99 12 2152387 1. Nf6 cxd4 2. Qf4 Kg7 3. Qg5 Ng6 4. Nh5 Kg8 5. Qf6
dxe3 6. Qg7
SCRUBBING TT (on new guess): -234 [-63] -74
9= -99 27 5378274 1. Nf6 Kg7 2. Nd5 Qd8 3. Nf5 Bxf5 4. Qxf5 Ng6 5. Rb1
b6
10> -99 30 5924068 1. Nf6 Kg7 2. Nh5 Kg6 3. Nf4 Kh6 4. Nde2 Bg4 5. Rb1
Bxe2 6. Nxe2
10b -98 35 6695185 1. Qf6 Kxh5 2. Ne2 Ng6 3. Qg7 Kg5 4. h4 Kg4 5. Qxh7
Kf5 6. Qh6
SCRUBBING TT (on new guess): -179 [-8] -19
10= -1 55 10959260 1. Qf6 Kxh5 2. Ne2 Ng6 3. Qg7 Kg5 4. h4 Kf5 5. Bh3
Ke4 6. Bg2 Kf5 7. Bh3 Ke4 8. Bg2 Kf5 9. Bh3 Ke4 10. Bg2 Kf5 11. Bh3 Ke4 12. Bg2
Kf5 13. Bh3 Ke4 14. Bg2 Kf5 15. Bh3 Ke4 16. Bg2 Kf5 17. Bh3 Ke4 18. Bg2 Kf5 19.
Bh3 Ke4 20. Bg2 Kf5 21. Bh3 Ke4 22. Bg2 Kf5 23. Bh3 Ke4 24. Bg2 Kf5 25. Bh3 Ke4
26. Bg2 Kf5 27. Bh3 Ke4 28. Bg2 Kf5 29. Bh3 Ke4 30. Bg2 Kf5
11> -1 69 13009827 1. Qf6 Kxh5 2. Rf1 Qd8 3. Qg7 h6 4. Ne2
NODES per second 168400
As always, these are nice positions, Jon. Cheers.
Andrew
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