Computer fail

[EroSennin]

Rybka thinks this is equal. Shame on her.


[D]r1b2rnk/pp3p1q/2pp1Pp1/4p1Pp/2B1P2Q/2NP2R1/PPP5/5R1K b - -

[Graham Banks]

Rybka thinks this is equal. Shame on her.

It would be interesting to compare Rybka's evaluation with that of other top engines also.

[Uri Blass]

Rybka thinks this is equal. Shame on her.


[D]r1b2rnk/pp3p1q/2pp1Pp1/4p1Pp/2B1P2Q/2NP2R1/PPP5/5R1K b - -

I do not have Rybka4 and my rybka gives white a small advantage.

New game, 120'/40+120'/40+120'/40
r1b2rnk/pp3p1q/2pp1Pp1/4p1Pp/2B1P2Q/2NP2R1/PPP5/5R1K b - - 0 1

Analysis by Rybka 3 1-cpu 32-bit :

1...b7-b5
= (-0.15) Depth: 2 00:00:00
1...b7-b5
= (-0.24) Depth: 3 00:00:00
1...b7-b5
= (-0.13) Depth: 4 00:00:00
1...b7-b5 2.Bc4-b3
= (-0.20) Depth: 5 00:00:00
1...b7-b5 2.Bc4-b3 Bc8-g4 3.Rg3-e3
= (-0.13) Depth: 6 00:00:00 1kN
1...b7-b5 2.Bc4-b3 Bc8-g4 3.Rg3-e3 b5-b4
= (-0.10) Depth: 7 00:00:00 2kN
1...b7-b5 2.Bc4-b3 b5-b4 3.Nc3-d1 a7-a5 4.Bb3-a4
= (-0.06) Depth: 8 00:00:00 7kN
1...b7-b5 2.Bc4-b3 a7-a6 3.Rg3-e3 b5-b4 4.Nc3-e2 Bc8-g4
= (0.01) Depth: 9 00:00:00 14kN
1...b7-b5 2.Bc4-b3 a7-a6 3.Rg3-e3 Bc8-g4 4.a2-a4 Ra8-b8 5.Kh1-g2
= (0.00) Depth: 10 00:00:01 29kN
1...b7-b5 2.Bc4-b3 a7-a6 3.Rg3-e3 Bc8-g4 4.a2-a4 Ra8-b8 5.Kh1-g2 Rb8-d8 6.Rf1-h1
= (0.01) Depth: 11 00:00:01 40kN
1...b7-b5 2.Bc4-b3 a7-a6 3.Rg3-e3 Bc8-g4 4.a2-a4 Ra8-b8 5.Kh1-g2 Rb8-d8 6.Rf1-h1
= (0.01) Depth: 12 00:00:02 60kN
1...b7-b5 2.Bc4-b3 b5-b4 3.Nc3-d1 a7-a5 4.Bb3-a4 Ra8-a6 5.Nd1-e3 Bc8-e6 6.Rg3-f3 Rf8-d8 7.Kh1-g2
= (0.03) Depth: 13 00:00:05 133kN
1...b7-b5 2.Bc4-b3 b5-b4 3.Nc3-d1 a7-a5 4.Bb3-a4 Ra8-a6 5.Nd1-e3 Bc8-e6 6.Rg3-f3 Rf8-d8 7.Kh1-g2
= (0.03) Depth: 14 00:00:09 221kN
1...b7-b5 2.Bc4-b3 Bc8-d7 3.a2-a4 a7-a6 4.Kh1-g2 Ra8-d8 5.Rg3-e3 Rd8-c8 6.Rf1-h1 Rf8-e8 7.Nc3-e2 Rc8-b8
= (0.12) Depth: 15 00:00:24 608kN
1...b7-b5 2.Bc4-b3 Bc8-d7 3.a2-a4 a7-a6 4.Kh1-g2 Ra8-d8 5.Rg3-e3 Rd8-c8 6.Rf1-h1 Rf8-e8 7.Nc3-e2 Rc8-b8 8.a4-a5
= (0.12) Depth: 16 00:00:56 1450kN
1...b7-b5 2.Bc4-b3 Bc8-d7 3.a2-a4 a7-a6 4.Kh1-g2 Ra8-d8 5.Rg3-e3 Rd8-c8 6.Rf1-h1 Rf8-e8 7.Nc3-e2 Rc8-d8 8.a4-a5 Re8-f8
= (0.14) Depth: 17 00:01:45 2631kN
1...b7-b5 2.Bc4-b3 Bc8-d7 3.a2-a4 a7-a6 4.Kh1-g2 Ra8-d8 5.Rg3-e3 Rd8-c8 6.Rf1-h1 Rf8-e8 7.Nc3-e2 Rc8-b8 8.a4-a5 Rb8-d8 9.Bb3-a2
= (0.14) Depth: 18 00:03:21 5020kN
1...b7-b5 2.Bc4-b3 Bc8-d7 3.a2-a4 a7-a6 4.Kh1-g2 Ra8-d8 5.Rg3-e3 Rd8-c8 6.Rf1-h1
= (0.24) Depth: 19 00:08:52 12949kN

(, 18.10.2010)

[Terry McCracken]

Rybka thinks this is equal. Shame on her.


[D]r1b2rnk/pp3p1q/2pp1Pp1/4p1Pp/2B1P2Q/2NP2R1/PPP5/5R1K b - -

How do you know it's a girl?

[Martin Thoresen]

How do you know it's a girl?

Vas said "she" about his program in an interview once and when he was asked about it he said "that's my secret" or something along those lines.

[Terry McCracken]

How do you know it's a girl?

Vas said "she" about his program in an interview once and when he was asked about it he said "that's my secret" or something along those lines.

Some fish have been known to change from female to male.

[Robert Flesher]

Rybka thinks this is equal. Shame on her.


[D]r1b2rnk/pp3p1q/2pp1Pp1/4p1Pp/2B1P2Q/2NP2R1/PPP5/5R1K b - -

Beautiful !

Black must give up material to stop the sac on h5 that wins once prepared. White needs only to put a rook on h2 , a knight on g3 and the bishop on d1. Then it's all over! The sac on h5 wins! Very nice. Another problem that engines seem clueless to understand. Maybe after a long thought some engine will see the light ?

[De Vos W]

r1b2rnk/pp3p1q/2pp1Pp1/4p1Pp/2B1P2Q/2NP2R1/PPP5/5R1K b - - 0 1

Analysis by Deep Shredder 12 UCI:

1...b5 2.Bb3 b4 3.Nd1 a5 4.c3 Be6 5.Ne3 Bxb3 6.axb3
+/= (0.63) Depth: 6/14 00:00:00 9kN
1...b5 2.Bb3 a5 3.a3 Be6 4.Bxe6 fxe6 5.Kg2 Qa7 6.Qh3 Rae8
+/= (0.47) Depth: 7/19 00:00:00 25kN
1...b5 2.Bb3 a5 3.a3 Be6 4.Bxe6 fxe6 5.Qh3 b4 6.Na4 h4 7.Rg2
+/= (0.44) Depth: 8/17 00:00:00 35kN
1...b5 2.Bb3 a5 3.a4 b4 4.Nd1 Be6 5.Ne3 Bxb3 6.cxb3 Rfd8 7.Kg2 d5
+/= (0.59) Depth: 9/19 00:00:00 66kN
1...b5 2.Bb3 b4 3.Nd1 Be6 4.Ne3 a5 5.Bxe6 fxe6 6.Kg2 d5 7.Rh1 Qd7 8.Rgh3 c5
+/= (0.65) Depth: 10/26 00:00:00 308kN
1...b5 2.Bb3 b4 3.Nd1 Be6 4.Ne3 a5 5.Bxe6 fxe6 6.Kg2 a4 7.Rh1 Qa7 8.Rgh3 Qd4 9.b3 axb3 10.axb3
+/= (0.68) Depth: 11/26 00:00:00 407kN
1...b5 2.Bb3 Be6 3.Ne2 Bg4 4.Re3 a5 5.a4 bxa4 6.Bxa4 Rab8 7.Rb1 Bxe2 8.Rxe2 Rb6 9.Kg1 Rfb8 10.c4
+/= (0.69) Depth: 12/27 00:00:00 902kN
1...b5 2.Bb3 Be6 3.Ne2 c5 4.Kg2 b4 5.Rh1 a5 6.Bxe6 fxe6 7.Rgh3 a4 8.c3 Qb7 9.c4 a3 10.b3 d5 11.cxd5 exd5
+/= (0.70) Depth: 13/33 00:00:02 2134kN
1...b5 2.Bb3 Be6 3.Ne2 c5 4.Kg2 b4 5.Rh1 a5 6.Bxe6 fxe6 7.Rgh3 Ra7 8.Ng3 Raf7 9.Nxh5 gxh5 10.Qxh5 Nxf6
+/- (0.78) Depth: 14/37 00:00:04 4023kN
1...b5 2.Bb3 Rb8 3.Kg2 a5 4.a4 bxa4 5.Nxa4 Rb4 6.Re3 Be6 7.Bxe6 fxe6 8.b3 Qa7 9.Qh3 Qf7 10.Nc3 Kh7 11.Rg3 Ra8
+/- (0.74) Depth: 15/32 00:00:05 5918kN
1...b5 2.Bb3 Rb8 3.Kg2 a5 4.a4 bxa4 5.Nxa4 Rb4 6.Re3 Bd7 7.Ra1 Be6 8.Bxe6 fxe6 9.b3 Qa7 10.Qg3 Kh7 11.Qf2 d5 12.exd5 Rg4+ 13.Kf1 exd5 14.Rxe5
+/- (0.73) Depth: 16/38 00:00:07 7415kN
1...b5 2.Bb3 Rb8 3.Kg2 a5 4.a4 bxa4 5.Nxa4 Rb4 6.Re3 Bd7 7.Ra1 Rfb8 8.Nc3 d5 9.Nd1 d4 10.Re1 R4b5
+/- (0.83) Depth: 17/44 00:00:26 26752kN
1...b5 2.Bb3 Rb8 3.Kg2 Bd7 4.Rh1 a5 5.a4 bxa4 6.Nxa4 Rb4 7.Ra1 Rd8 8.Nc3 Be6 9.Bxe6 fxe6 10.Nd1 Ra8 11.Rf3 Qf7 12.Qe1 c5
+/- (0.84) Depth: 18/47 00:01:10 71368kN
1...b5 2.Bb3 Rb8 3.Kg2 Bd7 4.Rh1 Rfd8 5.a3 a5 6.Re3 a4 7.Ba2 b4 8.Nxa4 c5 9.Bb3 bxa3 10.bxa3 Bxa4 11.Bxa4 Ra8 12.Bb3
+/- (0.82) Depth: 19/46 00:02:00 124mN
1...b5 2.Bb3 Rb8 3.Kg2 Bd7 4.Rh1 a5 5.a4 bxa4 6.Nxa4 Rb4 7.Ra1 Ra8 8.Rf3 c5 9.Nc3 a4
+/- (0.84) Depth: 20/47 00:02:41 166mN

(18.10.2010)

[M ANSARI]

Engines don't see that as equal, for example Rybka gives a +.45 at depth 21 and this kind of evaluation in a position where black is totally passive can only mean an easy win. There are way too many iterations and possible black replies for the engine to look through every single line and give an extremely high evaluation. I am pretty sure most of the top engines would win this as white pretty easily.

[De Vos W]

Fritz 10 gives white a advantage!
r1b2rnk/pp3p1q/2pp1Pp1/4p1Pp/2B1P2Q/2NP2R1/PPP5/5R1K b - - 0 1

Analysis by Fritz 10:

1...b5 2.Bb3 b4 3.Nb1 a5 4.Bc4 Bg4 5.Nd2 a4 6.c3 bxc3
+/- (1.02) Depth: 9/21 00:00:00 146kN
1...b5 2.Bb3 b4 3.Nb1 a5 4.Bc4 Bg4 5.Nd2 a4 6.c3 bxc3
+/- (1.02) Depth: 10/15 00:00:00 159kN
1...b5 2.Bb3 Rd8 3.Rg2 b4 4.Ne2 a5 5.Bc4 Bg4
+/- (0.99) Depth: 11/22 00:00:00 371kN
1...b5 2.Bb3 Rd8 3.Rf2 b4 4.Ne2 a5 5.Bc4 a4 6.d4 exd4 7.Nxd4 Bd7
+/- (1.00) Depth: 12/25 00:00:00 709kN
1...b5 2.Bb3 b4 3.Nb1 a5 4.a4 bxa3 5.Nxa3 a4 6.Bc4 Rb8 7.Rb1 Be6 8.Bxe6
+/- (0.95) Depth: 13/26 00:00:00 1415kN
1...b5 2.Bb3 b4 3.Nb1 Bd7 4.Rg2 Rfe8 5.Rff2 a5 6.a4 Be6 7.Bxe6 Rxe6 8.Nd2 Rb8
+/- (0.95) Depth: 14/31 00:00:01 2525kN
1...b5 2.Bb3 b4 3.Nb1 Bd7 4.Rg2 a5 5.a4 bxa3 6.Nxa3 a4 7.Bc4 Rab8 8.Rb1 Be6
+/- (0.97) Depth: 15/27 00:00:03 5884kN
1...b5 2.Bb3 b4 3.Nb1 a5 4.a4 bxa3 5.Nxa3 a4 6.Ba2 Rb8 7.Rb1 Bg4 8.Bc4 Be6 9.Bxe6
+/- (0.95) Depth: 16/30 00:00:06 10931kN
1...b5 2.Bb3 b4 3.Nb1 a5 4.a4 bxa3 5.Nxa3 a4 6.Ba2 Rb8 7.Rb1 Bg4 8.Bc4 Rfd8 9.Re3 d5
+/- (0.86) Depth: 17/33 00:00:10 18318kN
1...b5 2.Bb3 b4 3.Nb1 a5 4.a4 bxa3 5.Nxa3 a4 6.Ba2 Rb8 7.Rb1 Rd8 8.Kg2
+/- (1.00) Depth: 18/37 00:00:27 48004kN
1...b5 2.Bb3 b4 3.Nb1 a5 4.a4 bxa3 5.Nxa3 a4 6.Ba2 Rb8 7.Rb1 Re8 8.Kg2 Be6 9.Bxe6
+/- (1.00) Depth: 19/39 00:01:03 110mN
1...b5 2.Bb3 b4 3.Nb1 a5 4.a4 bxa3 5.Nxa3 a4 6.Ba2 Rb8 7.Rb1 Re8 8.Kg2 Be6 9.Bxe6
+/- (1.01) Depth: 20/41 00:02:18 239mN
(18.10.2010)