how many programs find 45. Bxf6!...

[Dan]

[Event ""]
[Site ""]
[Date "2009.3.20"]
[Round ""]
[White "CM10_Cheska"]
[Black "Rybka 2.2"]
[TimeControl "40/1800"]
[Result "1:0"]
[ECO "C65"]

no opening book

Time Control: 40/30 moves/minute

Pentium M 1.4 gHz

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Bc5 5.Nxe5 Nxe5 6.d4 Qe7 7.dxc5 c6 8.Be2 Nxe4 9.Re1 Qxc5 10.Be3 Qd5 11.Bd3 Nxd3 12.cxd3 Nf6
13.Nc3 Qf5 14.Bxa7+ Kf8 15.Qe2 h6 16.Qe7+ Kg8 17.Bd4 Nd5 18.Qc5 Kh7 19.Nxd5 cxd5 20.Re3 Ra6 21.Rf3 Qe6 22.Bc3 f6 23.Qd4 Qc6
24.Re3 Ra4 25.b4 Rg8 26.a3 Ra6 27.Re7 Qd6 28.Qe3 b5 29.Bb2 Qb8 30.Re1 Re6 31.Qf3 Rxe1+ 32.Rxe1 Qd6 33.Bd4 Kh8 34.h3 Bb7 35.Bc5
Qa6 36.d4 d6 37.Re6 Bc6 38.Rxd6 Qb7 39.Qc3 Re8 40.Bb6 Rc8 41.Qc5 Qa8 42.Qc1 Qb7 43.Rd8+ Rxd8 44.Bxd8 Qa6

[d]3B3k/6p1/q1b2p1p/1p1p4/1P1P4/P6P/5PP1/2Q3K1 w - - 0 45

45.Bxf6! (Rybka 2.2 was expecting Bc7)

...gxf6 46.Qxh6+Kg8 47.Qg6+ Kh8 48.Qxf6+ Kh7 49.Qf7+ Kh8 50.Qf8+ Kh7 51.Qe7+ Kg8 52.Qe6+ Kh7 53.h4 Qb7 54.h5 Qc7 55.Qg6+ Kh8 56.g3 Qc8 57.h6 Qc7 58.g4 Bb7 59.Qf6+ Kg8 60.Kg2 Kh7 61.f4 Bc6 62.Qf8 Be8 63.Qxe8 Qxf4 64.Qe5 Qxg4+ 65.Kf2 Qh4+ 66.Ke2 Qxh6 67.Qxd5 Qa6 68.Qf7+ Kh6 69.Qf3 Kg5 70.d5 Qc8 71.Kd2 Qf5 72.Qd3 Qf2+ 73.Kc3 Qf6+ 74.Kb3 Qb6 75.a4 bxa4+ 76.Kxa4 Qa7+ 77.Kb3 Kf6 78.b5 Ke5 79.Kb4 Qf2
80.d6 Qe1+ 81.Kc5 Qc1+ 82.Kb6 Qh6 83.Qc3+ Ke6 84.Qc6 Qe3+ 85.Kc7 Qe3+ black resigns mate in 21...

[Cubeman]

Pocket Fritz 3 with Hiarcs 12.1 takes 15 seconds depth 11 to award 1.Bxf6 top score (0.91)

[swami]

CCT version of Bright finds it immediately.

New game
3B3k/6p1/q1b2p1p/1p1p4/1P1P4/P6P/5PP1/2Q3K1 w - - 0 1

Analysis by bright-0.4-cct1:

1.Be7
+/- (0.90) Depth: 1/1 00:00:00
1.Bc7 Bd7 2.Qe3 Bf5 3.Qe8+ Kh7
+/- (1.10) Depth: 1/1 00:00:00
1.Bc7 Bd7 2.Qe3 Bf5 3.Qe8+ Kh7
+/- (1.10) Depth: 6/14 00:00:00
1.Bc7 Bd7 2.Qe3 Bf5 3.Qe8+ Kh7
+/- (1.10) Depth: 6/14 00:00:00
1.Bc7 Bd7 2.Qe3 Bf5 3.Qe8+ Kh7
+/- (1.10) Depth: 6/14 00:00:00
1.Bc7 Bd7 2.Qe3 Bf5 3.Qe8+ Kh7
+/- (1.10) Depth: 6/14 00:00:00
1.Bc7 Bd7 2.Bf4 Qa4 3.Qc5 Qd1+ 4.Kh2
+/- (1.06) Depth: 6/16 00:00:00 8kN
1.Bc7 Bd7 2.Kh2 Qc6 3.Qc5 Qxc5 4.dxc5 Kg8
+/- (0.98) Depth: 7/20 00:00:00 49kN
1.Qc5 Bd7 2.Kh2 Qc6 3.Qe7 Qe6 4.Qf8+ Kh7
+/- (1.05) Depth: 7/23 00:00:00 69kN
1.Qc5 Bd7 2.Kh2 Qc6 3.Kg3 Qe6 4.Qf8+ Kh7 5.Bc7
+/- (1.05) Depth: 8/23 00:00:00 110kN
1.Qc5 Qc8 2.Bb6 Kh7 3.Qc3 f5 4.h4 Qe6 5.Bc7
+/- (1.00) Depth: 9/26 00:00:00 319kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qxf6 Qc8 4.g4 Be8 5.Qg5+ Kf8 6.h4 Qc2 7.Qf4+ Bf7 8.Qb8+ Be8
+/- (1.05) Depth: 9/26 00:00:00 421kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qxf6 Bb7 4.Qxa6 Bxa6 5.h4 Kf7 6.g4 Ke6 7.f4 Bb7
+/- (1.05) Depth: 10/30 00:00:00 851kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qxf6 Qa8 4.Qe6+ Kf8 5.h4 Be8 6.Qf6+ Kg8 7.Qe5 Bf7 8.g4 Qxa3 9.Qb8+ Kg7 10.Qxb5
+/- (1.03) Depth: 11/31 00:00:01 1959kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qxf6 Qa8 4.Qe6+ Kf8 5.h4 Be8 6.Qf6+ Kg8 7.Qg5+ Kf8 8.Qh6+ Kf7 9.Qh5+ Ke7 10.Qe5+ Kf8 11.Qd6+ Kg7
+/- (1.04) Depth: 12/32 00:00:01 3567kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qxf6 Qa8 4.Qe6+ Kf8 5.h4 Be8 6.Qf6+ Kg8 7.Qg5+ Kf8 8.Qh6+ Kf7 9.Qf4+ Kg7 10.Qe5+ Kf8 11.Qd6+ Kg7 12.Qe7+ Bf7
+/- (1.04) Depth: 13/38 00:00:01 5753kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qxf6 Qa8 4.Qe6+ Kf8 5.h4 Be8 6.Qf6+ Kg8 7.Qg5+ Kf8 8.Qh6+ Kf7 9.Qf4+ Kg7 10.Qe5+ Kf8 11.Qd6+ Kg7 12.Qc7+ Kf8 13.Qc5+ Kg7 14.Qe7+ Bf7
+/- (1.04) Depth: 14/39 00:00:02 9510kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Ke8 5.h4 Bb7 6.Qxa6 Bxa6 7.g4 Bc8 8.f3 Ke7 9.Kf2 Be6 10.h5 Kf6 11.h6
+/- (1.31) Depth: 15/45 00:00:04 21223kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Ke8 5.h4 Bb7 6.Qxa6 Bxa6 7.g4 Bc8 8.f3 Ke7 9.Kf2 Bd7 10.h5 Kf6 11.h6 Ke6
+- (1.42) Depth: 16/47 00:00:06 32973kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Ke8 5.h4 Bb7 6.Qxa6 Bxa6 7.g4 Bc8 8.f3 Ke7 9.Kf2 Bd7 10.h5 Kf6 11.Kg3 Be6 12.f4
+- (1.45) Depth: 17/49 00:00:11 62040kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.Qe6+ Kf8 6.h4 Qa8 7.h5 Be8 8.Qf6+ Kg8 9.Qg5+ Kh7 10.Qe7+ Kh6 11.g4 Qc8 12.Kh2 Qd7 13.Qe3+ Kh7 14.f4 Kh6
+- (1.54) Depth: 18/50 00:00:25 139mN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.Qe6+ Kf8 6.h4 Qa8 7.h5 Be8 8.Qf6+ Kg8 9.Qg5+ Kf8 10.h6 Qb7 11.g4 Qh7 12.Qf6+ Kg8 13.f4 Qb1+ 14.Kg2 Qb2+ 15.Kf1 Qb1+ 16.Ke2 Qb2+
+- (1.51) Depth: 19/59 00:00:51 278mN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.h4 Qc8 6.Kh2 Qe8 7.g4 Qe4 8.f3 Qe2+ 9.Kg3 Qe1+ 10.Kf4 Be8 11.h5 Qc1+ 12.Ke5 Bf7 13.h6 Qc7+ 14.Kf5 Qd7+ 15.Kg5 Kf8
+- (1.56) Depth: 20/59 00:02:46 860mN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.h4 Qc8 6.Kh2 Qe8 7.g4 Qe4 8.f3 Qe2+ 9.Kg3 Qe1+ 10.Kf4 Be8 11.h5 Qc1+ 12.Ke5 Bf7 13.h6 Qc7+ 14.Kf5 Qd7+ 15.Kg5 Be6 16.Qg6+ Kh8
+- (1.66) Depth: 21/59 00:03:31 1091mN

[ernst]

DF10

New game - Deep Fritz 10
3B3k/6p1/q1b2p1p/1p1p4/1P1P4/P6P/5PP1/2Q3K1 w - - 0 1

Analysis by Deep Fritz 10:

1.Bxf6 Kg8 2.Be5 Qc8 3.Qc5 Qe6 4.Kf1 Qg6 5.Qe7
+- (2.31) Depth: 9/15 00:00:00 248kN
1.Bxf6 Kg8 2.Be5 Qc8 3.Qc5 Qe6 4.h4 Kh7 5.h5 g6
+- (2.35) Depth: 10/17 00:00:00 307kN
1.Bxf6 Kg8 2.Be5 Qc8 3.Qc5 Qe6 4.h4 Kf7 5.h5 g6 6.hxg6+ Kxg6
+- (2.30) Depth: 11/23 00:00:00 411kN
1.Bxf6 Kg8 2.Be5 Qc8 3.Qc5 Qe6 4.f4 Bd7 5.g4 Qc6 6.Qe7 Qc1+ 7.Kh2 Qd2+
+- (2.34) Depth: 12/25 00:00:00 629kN
1.Bxf6 Kg8 2.Be5 Qc8 3.Qc5 Qe6 4.f4 Bd7 5.Kh2 Qf7 6.f5 Qxf5 7.Qxd5+ Qe6
+- (2.32) Depth: 13/34 00:00:00 1058kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc3 Qg6 4.Kh2 Qe6 5.Qc7 Kf7 6.Qd8 Qe8 7.Qc7 Qe7
+- (2.16) Depth: 14/40 00:00:01 4825kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc3 Qg6 4.Kh2 Qe6 5.Qc7 Kf7 6.Qd8 Qe8 7.Qb6 Qe7 8.Kg1 Ke8
+- (2.16) Depth: 15/36 00:00:01 8555kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc3 Qg6 4.Kh2 Qe6 5.Qc7 Kf7 6.Qc1 g5 7.Qc2 Ke8 8.Qc5 Qc6
+- (2.16) Depth: 16/37 00:00:02 15251kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc3 Qg6 4.Kh2 Qe6 5.Qc7 Kf7 6.Qc1
+- (2.16) Depth: 17/36 00:00:03 27013kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc3 Qg6 4.Kh2 Qe6 5.Qc7 Kf7 6.Qc1 Qc6
+- (2.16) Depth: 18/47 00:00:06 63126kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc3 Qg6 4.Kh2 Qe6 5.Qc7 Kf7 6.Qd8 Qe8 7.Qb6 Qe6 8.Qa7 Qc6
+- (2.15) Depth: 19/45 00:00:13 134mN

(, 21.03.2009)

[Guenther]

Is there really a proof for a win after 45...Kg8 instead of accepting
the sack? There is a lot of potential at least in program vs. program play,
that they underestimate drawing chances with wrong coloured Bishops
on the board. Generally it is said though that the attacking side in similar
positions with Q plus wrong Bishops on board should be winning,
but this is said for Humans.

Guenther

[kgburcham]

Avoid 45...gxf6?

[d] 3B3k/6p1/q1b2p1p/1p1p4/1P1P4/P6P/5PP1/2Q3K1 w - - 0 1

Zappa Mexico II

14/47 0:01 +1.11 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 h5 49.Qc7 Kh7 50.Bf4 (4.085.461) 2465
15/47 0:02 +1.09 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 h5 49.Qc7 Qc6 50.Qd8+ Kf7 51.f3 (7.470.835) 2584
16/47 0:05 +1.10 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Kf7 49.Bd6 Kg6 50.f3 h5 51.Bg3 (14.919.329) 2689
17/51 0:10 +1.09 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Kf7 49.Bd6 Kg6 50.f3 h5 51.Bg3 Qc6 (29.052.371) 2775
18/55 0:21 +1.11 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Kf7 49.Bd6 Kg6 50.Qc7 Kh7 51.f3 Kh8 52.Bf4 (61.414.964) 2852
19/57 0:58 +1.10 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Kf7 49.Bd6 Kg6 50.Qc2+ Kf7 51.Qc7 Kg8 52.Qc5 Qf7 53.f3 Qe6 (175.809.823) 2995
20/59 2:00 +1.10 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Kf7 49.Bd6 Kg6 50.Qc2+ Qe4 51.Qc7 Qe8 52.Be5 Qe6 53.Bf4 (363.145.219) 3010
21/61 4:26 +1.09 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Be8 49.Bd6 Qf7 50.Kg1 Qb7 51.Be5 Qc6 52.Kh2 Kf7 53.Qa7+ Bd7 54.Kg1 Qc1+ 55.Kh2 Qc6 (787.797.604) 2959
22/63 9:20 +1.09 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Be8 49.Bd6 Qf7 50.Bg3 Qd7 51.Qb6 Kh7 52.Be5 Bg6 53.Kg1 Bd3 54.Qc5 Kg8 55.Kh1 Qe6 (1.610.816.244) 2874
23/65 18:44 +1.09 45.Bxf6 Kg8 46.Be5 Bd7 47.Qc5 Qe6 48.Kh2 Be8 49.Bd6 Qf7 50.Bg3 Qd7 51.Qb6 Kh7 52.Be5 Bg6 53.Kg1 Bd3 54.Qc5 Kg8 55.Kh1 Qe6 56.f3 (3.163.683.432) 2813

Deep Fritz 1:

1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Ke8 5.g4 Kd7 6.Qg7+ Kd8
+- (1.91) Depth: 14/33 00:00:00 3977kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.f4 Qa8 6.Qe6+ Kg7
+- (1.94) Depth: 15/35 00:00:02 12598kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.f4 Qb7 6.g4 Qc7
+- (2.03) Depth: 16/37 00:00:06 30256kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.f4 Qa8 6.Qe6+ Kf8
+- (2.00) Depth: 17/38 00:00:13 72905kN
1.Bxf6 gxf6 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.Qxf6+ Kg8 5.Qe6+ Kf8 6.g4 Qb7
+- (2.06) Depth: 18/41 00:00:42 213668kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc5 Qe6 4.Kh2 Qf7 5.f3 Be8 6.f4 Kh7
+- (2.09) Depth: 19/42 00:01:40 521751kN
1.Bxf6 Kg8 2.Be5 Bd7 3.Qc5 Qe6 4.Kh2 Qf7 5.f3 Be8 6.f4 Kh7
+- (2.09) Depth: 20/44 00:02:49 880994kN