Test Position

[Yar]

Hello,

This game was played yesterday by rybka (white, cluster 52 cores) vs centaur:

[Event "60m + 30s, rated"]
[Site "?"]
[Date "2009.07.01"]
[Round "?"]
[White "Rechenschieber, Rybka 3g55 cluster A"]
[Black "Kreuzfahrtschiff"]
[Result "1-0"]
[WhiteElo "2471"]
[PlyCount "71"]
[EventDate "2009.07.01"]
[EventType "rapid"]

1. e4 {0.05/1 0} c5 {2} 2. Nf3 {0.05/1 0} d6 {18} 3. d4 {0.05/1 0} cxd4 {1} 4.
Nxd4 {0.05/1 0} Nf6 {3} 5. Nc3 {0.05/1 0} a6 {1} 6. Be3 {0.05/1 0} e6 {7} 7. f3
{0.05/1 0} b5 {32} 8. Qd2 {0.05/1 0} Nbd7 {13} 9. g4 {0.05/1 0} b4 {9} 10. Nce2
{0.05/1 0} h6 {16} 11. O-O-O {0.37/18 130} Qc7 {25} 12. h4 {0.34/20 388} d5 {11
} 13. Bf4 {0.37/20 418} Qa5 {49} 14. Kb1 {0.25/18 66} dxe4 {33} 15. fxe4 {0.33/
19 131} Nxg4 {47} 16. Bg2 {0.38/19 149} Nde5 {52} 17. Bh3 {0.82/18 120} Nc4 {
2158} 18. Qe1 {0.79/18 51} Nge5 {4} 19. Qg3 {0.80/18 92} Bd7 {129} 20. Nb3 {0.
78/19 66} Qc7 {3} 21. Bf1 {0.97/19 215} O-O-O {23} 22. Nec1 {1.11/19 176} f6 {4
} 23. Bxc4 {1.18/17 63} Qxc4 {3} 24. Nd3 {1.28/18 78} Ba4 {6} 25. Nxe5 {1.79/
18 71} Rxd1+ {4} 26. Rxd1 {1.64/18 7} fxe5 {2} 27. Bxe5 {1.89/19 31} Qxe4 {3}
28. Rd4 {2.03/19 72} Qh1+ {24} 29. Nc1 {2.24/19 0} Qc6 {108} 30. b3 {2.19/20 0}
Bb5 {11} 31. c4 {2.36/20 126} bxc3 {8} 32. a4 {2.36/20 13} Ba3 {217} 33. axb5 {
2.63/20 0} axb5 {5} 34. Kc2 {3.01/20 68} Bc5 {294} 35. Qxc3 {3.21/19 96} Kb7 {4
} 36. Rg4 {3.32/19 23 Kreuzfahrtschiff resigns (Lag: Av=0.52s, max=2.1s)
Kreuzfahrtschiff resigns} 1-0

[D] r1b1kb1r/5pp1/p3p2p/q3n3/1p1NPBnP/8/PPPQN1B1/1K1R3R w kq - 0 17

Looks like bh3! is winning, at least i didnt find any decent defense for black. Rybka 3 needs about 1 1/2 hours to find this move (rybka was running on core 2 duo 6750 32 bit). Can your engine find it ?
Analysis by Rybka 3 32-bit:

17.Nd4-b3 Qa5-b6 18.Ne2-d4
= (-0.06) Depth: 6 00:00:00 7kN
17.Nd4-b3 Qa5-b6 18.Ne2-d4 Bf8-e7
= (-0.12) Depth: 7 00:00:00 12kN
17.Bf4xe5 Ng4xe5 18.Nd4-c6
= (0.08) Depth: 7 00:00:00 18kN
17.Bf4xe5 Ng4xe5 18.Nd4-c6 Ne5xc6 19.e4-e5 Nc6xe5 20.Bg2xa8 Bf8-e7 21.Rh1-g1 g7-g5 22.h4xg5 h6xg5 23.Rg1-h1
= (0.03) Depth: 8 00:00:01 60kN
17.Bf4xe5 Ng4xe5 18.Nd4-c6 Ne5xc6 19.e4-e5 Nc6xe5 20.Bg2xa8 Bf8-e7 21.Rh1-g1 g7-g5 22.h4xg5 h6xg5 23.Rg1-h1
= (0.03) Depth: 9 00:00:01 72kN
17.Bf4xe5 Ng4xe5 18.Nd4-c6 Ne5xc6 19.e4-e5 Nc6xe5 20.Bg2xa8 Bf8-e7 21.Rh1-g1 g7-g6 22.Ne2-d4 Qa5-c5 23.Nd4-b3 Qc5-b5
= (0.17) Depth: 10 00:00:02 146kN
17.Bf4xe5 Ng4xe5 18.Nd4-c6 Ne5xc6 19.e4-e5 Nc6xe5 20.Bg2xa8 Bf8-e7 21.Rh1-g1 g7-g6 22.Ne2-d4 Qa5-c5 23.Nd4-b3 Qc5-b5
= (0.17) Depth: 11 00:00:03 207kN
17.Bf4xe5 Ng4xe5 18.Nd4-c6 Ne5xc6 19.e4-e5 Nc6xe5 20.Bg2xa8 Bf8-e7 21.Rh1-g1 Qa5-c5 22.Rg1xg7 Be7-f6 23.b2-b3
= (0.21) Depth: 12 00:00:05 365kN
17.Nd4-c6
+/= (0.37 !) Depth: 12 00:00:07 506kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Ne2-d4 0-0 21.Rh1-g1 Qa5-c5 22.Nd4-b3 Qc5-a7 23.Ba8-e4
+/= (0.32) Depth: 12 00:00:09 630kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 Qa5-c5 22.Rg1xg7 Be7-f6 23.b2-b3
= (0.21) Depth: 13 00:00:13 971kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 0-0 22.Qd2xh6 Ne5-g6 23.Qh6-e3 Ng6xh4 24.Ba8-e4 g7-g6 25.Qe3-g3 Nh4-f5 26.Be4xf5 Qa5xf5 27.Ne2-d4
= (0.19) Depth: 14 00:00:34 2726kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 0-0 22.Qd2xh6 Ne5-g6 23.Qh6-e3 Ng6xh4 24.Ba8-e4 g7-g6 25.Qe3-g3 Nh4-f5 26.Be4xf5 Qa5xf5 27.Ne2-d4
= (0.19) Depth: 15 00:00:51 4085kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 0-0 22.Qd2xh6 Ne5-g6 23.Qh6-e3 Ng6xh4 24.Ba8-e4 g7-g6 25.Qe3-g3 Nh4-f5 26.Be4xf5 Qa5xf5 27.Qg3-h2 Be7-f6
= (0.19) Depth: 16 00:01:57 9713kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 0-0 22.Qd2xh6 Ne5-g6 23.Qh6-e3 Ng6xh4 24.Ne2-d4 Qa5-c5 25.Ba8-e4 Be7-f6 26.Qe3-f2 Bf6-e7 27.Qf2-f4 f7-f5 28.Be4-h1
+/= (0.27) Depth: 17 00:05:50 29730kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 g7-g6 22.Ne2-d4 Qa5-c5 23.Nd4-b3 Qc5-c7 24.Qd2-f4 Qc7-b8 25.Ba8-g2 g6-g5 26.Qf4-d4 Qb8-c7 27.Bg2-c6+ Ke8-f8
+/= (0.31) Depth: 18 00:14:12 72710kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 g7-g6 22.Ne2-d4 Qa5-c5 23.Nd4-b3 Qc5-c7 24.Qd2-f4 Qc7-b8 25.Ba8-g2 g6-g5 26.Qf4-d4 Qb8-c7 27.Bg2-c6+ Ke8-f8
+/= (0.31) Depth: 19 00:19:09 98385kN
17.Nd4-c6 Ne5xc6 18.e4-e5 Nc6xe5 19.Bg2xa8 Bf8-e7 20.Bf4xe5 Ng4xe5 21.Rh1-g1 g7-g6 22.Ne2-d4 Qa5-c5 23.Nd4-b3 Qc5-c7 24.Qd2-f4 Qc7-b8 25.Ba8-g2 g6-g5 26.Qf4-d4 Qb8-c7 27.Bg2-c6+ Ke8-f8
+/= (0.31) Depth: 20 00:26:29 139mN
17.Bg2-h3
+/= (0.51 !) Depth: 20 01:04:16 262mN
17.Bg2-h3
+/- (0.71 !) Depth: 20 01:27:47 337mN
17.Bg2-h3 Ne5-c4 18.Qd2-e1 Ng4-e5 19.Qe1-g3 Bc8-d7 20.Nd4-b3 Qa5-c7 21.Bh3-f1 0-0-0 22.Ne2-c1 f7-f6 23.Bf1xc4 Qc7xc4 24.Nc1-d3 Ne5-c6 25.Bf4-c7 Rd8-e8 26.Bc7-d6
+/- (0.86) Depth: 20 02:18:28 515mN
17.Bg2-h3 Ne5-c4 18.Qd2-e1 Ng4-e5 19.Qe1-g3 Bc8-d7 20.Nd4-b3 Qa5-c7[] 21.Bh3-f1 0-0-0 22.Ne2-c1 f7-f6[] 23.Bf1xc4 Qc7xc4 24.Nc1-d3 Ne5-f7 25.Nb3-a5 Qc4-b5 26.Bf4-c7 e6-e5 27.Bc7xd8 Nf7xd8 28.Na5-b3 Nd8-e6 29.Rh1-h2 Bf8-d6 30.Rh2-d2 Rh8-d8 31.Nd3-f2 Bd6-c7 32.Qg3-g6
+/- (0.89) Depth: 21 03:40:29 809mN
17.Bg2-h3 Ne5-c4 18.Qd2-e1 Ng4-e5 19.Qe1-g3 Bc8-d7 20.Nd4-b3 Qa5-c7 21.Bh3-f1 0-0-0 22.Ne2-c1 f7-f6 23.Bf1xc4 Qc7xc4 24.Nc1-d3 Ne5-f7 25.Nb3-a5 Qc4-b5 26.Bf4-c7 e6-e5 27.Bc7xd8 Nf7xd8 28.Na5-b3Nd8-e6 29.Rh1-h2 Bf8-d6 30.Rh2-d2 Rh8-d8 31.Nd3-f2 Bd6-c7 32.Qg3-g6
+/- (0.89) Depth: 22 04:43:44 1031mN
17.Bg2-h3 Ne5-c4 18.Qd2-e1 Ng4-e5 19.Qe1-g3 Bc8-d7 20.Nd4-b3 Qa5-c7 21.Bh3-f1 0-0-0 22.Ne2-c1 f7-f6 23.Bf1xc4 Qc7xc4 24.Nc1-d3 Ne5-f7 25.Nb3-a5 Qc4-b5 26.Bf4-c7 e6-e5 27.Bc7xd8 Nf7xd8 28.Na5-b3Nd8-e6 29.Rd1-c1 Kc8-b8 30.c2-c3 b4xc3 31.Rc1xc3
+/- (0.90) Depth: 23 08:33:41 1873mN

With best regards,
Yar

[yanquis1972]

i tested this position a bit last night. rybka 3 dynamic with contempt analyze set at 20 found it in under 10 minutes (i think at d19 if i remember right), if i gave her all 4 cores w/ HT off. i doubt any engine would be faster but i will try hiarcs later today.

[AdminX]

Analysis by Bright-0.4a:

1.Nb3 Qc7 2.Qd4 Bb7 3.Bh3 Rd8
+/- (0.91) Depth: 6/15 00:00:03 29kN
1.Nf3 Nxf3 2.Bxf3 e5 3.Rhg1 Nf2 4.Rdf1 exf4 5.Rxf2
+/- (0.98) Depth: 6/15 00:00:03 38kN
1.Nc6 Nxc6 2.e5 Ngxe5 3.Bxe5 Nxe5 4.Bxa8 Be7 5.Be4 0-0
+/- (1.10) Depth: 6/15 00:00:03 58kN
=/+ (-0.30) Depth: 8/16 00:00:11 153kN
1.Nb3 Qb6 2.Ned4 Be7 3.Nf3 Nxf3 4.Bxf3 e5 5.Bxg4 Bxg4 6.Bxe5 Bxd1 7.Rxd1
+/- (0.78) Depth: 8/17 00:00:13 244kN
+/= (0.31) Depth: 10/22 00:00:45 1784kN
1.Rhf1 Be7 2.Bh3 Nc4 3.Qd3 Nge5 4.Qg3 g5 5.Bxe5 Qxe5
+/= (0.47) Depth: 10/36 00:00:46 3152kN
1.Rhg1 Bd7 2.Nc1 Nc4 3.Qe2 Nge5 4.Ncb3 Qb6 5.Bf3 Rd8 6.h5 Ba4 7.Ka1 Rd7
+/= (0.56) Depth: 10/39 00:00:46 4791kN
+/= (0.30) Depth: 14/59 00:01:16 106mN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 g6 4.Nb3 Qc7 5.Bf1 Bg7 6.Ned4 Nxb2 7.Kxb2 Bb7 8.Bg2 0-0 9.Ka1 Rfd8 10.h5 g5
+/= (0.57) Depth: 14/59 00:01:31 155mN
+/- (0.82) Depth: 19/67 00:12:40 2959mN

[yanquis1972]

wow! prove me wrong. i would not want to meet bright in a dark alley.

in fact i just ran it in arena & it found Bh3 in only 3 seconds!

[royb]

wow! prove me wrong. i would not want to meet bright in a dark alley.

in fact i just ran it in arena & it found Bh3 in only 3 seconds!

Bright is consistently one of the fastest engines to spot tactical strokes and I use it heavily for just that purpose.

It is certainly no match for Rybka 3 in a long series of games however. The ratings lists show this of course. For fun I ran Rybka 3 dynamic with no book vs Bright-0.4a with the mainbook for Arena and Rybka 3 trounced it game after game. I forget the final match score but lopsided doesn't begin to describe it.

Roy

[yanquis1972]

zappa likes Bh3 immediately but takes a little while to see it's winning --

Analysis by Zappa Mexico II:

1.Bh3 Nc4 2.Qe1 Nge5 3.Nb3 Qb5 4.Ned4 Qb6
+/= (0.40) Depth: 9/30 00:00:01 817kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Nb3 Qb5 4.Ned4
+/= (0.40) Depth: 9/30 00:00:01 1060kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Nb3 Qb6 4.Qg3 f6
+/= (0.34) Depth: 10/33 00:00:01 1312kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Nb3 Qb6 4.Qg3 f6
+/= (0.34) Depth: 10/33 00:00:02 2409kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 g6 4.Rhf1 Be7 5.b3
+/= (0.55) Depth: 11/41 00:00:02 3445kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 g6 4.Rhf1 Be7 5.b3
+/= (0.55) Depth: 11/41 00:00:02 4055kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 g6 4.Rhf1 Be7 5.b3
+/= (0.55) Depth: 12/41 00:00:03 6855kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 g6 4.Rhf1 Be7 5.b3
+/= (0.55) Depth: 12/41 00:00:04 8239kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.b3 Bxe4 5.bxc4 Nxc4 6.Ka1 Bxh1 7.Nxe6
+/= (0.47) Depth: 13/45 00:00:05 11123kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.b3 Bxe4 5.bxc4 Nxc4 6.Ka1 Bxh1 7.Nxe6
+/= (0.47) Depth: 13/45 00:00:07 15764kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 g6 4.Rhf1 Bg7 5.h5 g5 6.Nb3 Qb5
= (0.24) Depth: 14/45 00:00:09 20949kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 g6 4.Rhf1 Bg7 5.h5 g5 6.Nb3 Qb5
= (0.24) Depth: 14/47 00:00:28 69116kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.b3 Bxe4 5.bxc4 Nxc4 6.Rhf1 Na3+ 7.Ka1 Rc8 8.Bc1 Nxc2+ 9.Nxc2 Bxc2
+/= (0.34) Depth: 15/49 00:00:37 90248kN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.b3 Bxe4 5.bxc4 Nxc4 6.Rhf1 Na3+ 7.Ka1 Rc8 8.Bc1 Nxc2+ 9.Nxc2 Bxc2
+/= (0.34) Depth: 15/49 00:00:47 117mN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.Nxe6 fxe6 5.Bxe6 Bxe4 6.Rhe1 g5 7.Bxe5 b3 8.Qxb3 Nxe5
+/- (0.75) Depth: 16/51 00:01:08 172mN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.Nxe6 fxe6 5.Bxe6 Bxe4 6.Rhe1 g5 7.Bxe5 b3 8.Qxb3 Nxe5
+/- (0.75) Depth: 16/51 00:01:17 195mN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.Nxe6 fxe6 5.Bxe6 Bxe4 6.Rhe1 g5 7.Bxe5 b3 8.Qxb3 Nxe5
+/- (0.75) Depth: 17/51 00:01:38 250mN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bb7 4.Nxe6 fxe6 5.Bxe6 Bxe4 6.Rhe1 g5 7.Bxe5 b3 8.Qxb3 Nxe5
+/- (0.75) Depth: 17/53 00:01:56 295mN
1.Bh3 Nc4 2.Qe1 Nge5 3.Qg3 Bd7 4.Nc1 g5 5.hxg5 hxg5 6.Qxg5 Qd8 7.Qg3 Qf6 8.Ncb3 Ba4
+/- (0.79) Depth: 18/55 00:03:26 523mN