hard tactical test for chess engines

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Orlov

hard tactical test for chess engines

Post by Orlov »

1rb2rk1/p2p1pb1/1pnP3p/2pNp1pP/P1B1P3/5N2/1PPK1PP1/R6R w - -

position from 1936 year. Very hard move is Nxg5! Combination seems as correct.

16. Nxg5 hxg5 17. h6 Bh8 18. h7+ Kg7 19. Ne3! Re8 20. Rh5! f6 21. Nf5+ Kf8 22. Rh6! Na5 23. Bg8! Ba6 24. b3! Re6 25. Rg6 Black resign.

nice game!
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smirobth
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Re: hard tactical test for chess engines

Post by smirobth »

[d]1rb2rk1/p2p1pb1/1pnP3p/2pNp1pP/P1B1P3/5N2/1PPK1PP1/R6R w - -
- Robin Smith
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smirobth
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Re: hard tactical test for chess engines

Post by smirobth »

Orlov wrote:1rb2rk1/p2p1pb1/1pnP3p/2pNp1pP/P1B1P3/5N2/1PPK1PP1/R6R w - -

position from 1936 year. Very hard move is Nxg5! Combination seems as correct.

16. Nxg5 hxg5 17. h6 Bh8 18. h7+ Kg7 19. Ne3! Re8 20. Rh5! f6 21. Nf5+ Kf8 22. Rh6! Na5 23. Bg8! Ba6 24. b3! Re6 25. Rg6 Black resign.

nice game!
Interesting and nice position. Playing 1...Na5 first, instead of capturing the knight on g5 right away, doesn't seem to save Black either. For example 1.Nxg5 Na5 2.Ba2 hxg5 3.h6 Bh8 4.h7+ Kg7 5.Ne7! Was this position from a game, and if so can you provide the details?
- Robin Smith
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Orlov

Re: hard tactical test for chess engines

Post by Orlov »

smirobth wrote:
Orlov wrote:1rb2rk1/p2p1pb1/1pnP3p/2pNp1pP/P1B1P3/5N2/1PPK1PP1/R6R w - -

position from 1936 year. Very hard move is Nxg5! Combination seems as correct.

16. Nxg5 hxg5 17. h6 Bh8 18. h7+ Kg7 19. Ne3! Re8 20. Rh5! f6 21. Nf5+ Kf8 22. Rh6! Na5 23. Bg8! Ba6 24. b3! Re6 25. Rg6 Black resign.

nice game!
Interesting and nice position. Playing 1...Na5 first, instead of capturing the knight on g5 right away, doesn't seem to save Black either. For example 1.Nxg5 Na5 2.Ba2 hxg5 3.h6 Bh8 4.h7+ Kg7 5.Ne7! Was this position from a game, and if so can you provide the details?
It's real game Simagin - Jakubovich, Moscaw, 1936:

[Event "Moscaw"]
[Site "?"]
[Date "1936.??.??"]
[Round "?"]
[White "Simagin"]
[Black "Jakubovich"]
[Result "1-0"]

1. d4 c5 2. d5 e5 3. e4 g6 4. Nc3 Bg7 5. d6 Nf6 6. Bg5 Qa5
7. Qd2 O-O 8. Nf3 Nc6 9. Bxf6 Bxf6 10. Nd5 Qxd2+ 11. Kxd2
Bg7 12. Bc4 Rb8 13. a4 h6 14. h4 b6 15. h5 g5 16. Nxg5 hxg5
17. h6 Bh8 18. h7+ Kg7 19. Ne3 Re8 20. Rh5 f6 21. Nf5+ Kf8
22. Rh6 Na5 23. Bg8 Ba6 24. b3 Re6 25. Rg6 Rxd6+ 26. Nxd6 1-0

next wonderfull position(also from it very old book):

2b2rk1/p5p1/1r6/3p3P/2pP1B2/1q2PK2/1P1Q1P2/RR6 b - - g5!!

Strange, but engines what I have dont see great move g5!!
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opraus
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Re: hard tactical test for chess engines

Post by opraus »

[d]2b2rk1/p5p1/1r6/3p3P/2pP1B2/1q2PK2/1P1Q1P2/RR6 b - -
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George Tsavdaris
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Re: hard tactical test for chess engines

Post by George Tsavdaris »

Orlov wrote: next wonderfull position(also from it very old book):

2b2rk1/p5p1/1r6/3p3P/2pP1B2/1q2PK2/1P1Q1P2/RR6 b - - g5!!

Strange, but engines what I have dont see great move g5!!
It seems i'm Chess engine's addicted. :D I predicted that 3 specific engines will find this move. And they found it! Others failed....
My favorite personality XQ9 in Chessmaster 10000 finds it very quickly, 67 seconds, in a comparably old machine(AMD3500+ 2.2GHz).
Also Deep Junior 8.ZX, an old Junior version, finds it in 1.85 minutes.
Also Rybka 1.1 32bit finds this in 5:32 minutes.

Analysis by XQ9 Chessmaster 10000:

1...Bc8-f5 2.Rb1-g1 Rf8-f7 3.Kf3-g3 Qb3xb2 4.Qd2xb2 Rb6xb2 5.Rg1-c1 Bf5-e4
-/+ (-1.02) Depth: 7 00:00:01 235kN
1...Bc8-f5 2.Rb1-g1 Rf8-f7 3.Ra1-a5 Bf5-e4+ 4.Kf3-g3 Rb6-f6 5.Kg3-h4 Qb3-b6
=/+ (-0.58) Depth: 8 00:00:01 405kN
1...Rb6-f6 2.Qd2-c3 Qb3-b7 3.Ra1-a5 Bc8-f5 4.Rb1-a1 Bf5-e4+ 5.Kf3-e2 a7-a6
-/+ (-0.71) Depth: 8 00:00:02 726kN
1...Rb6-f6 2.Qd2-c3 Qb3-b7 3.Kf3-e2 Rf6-b6 4.h5-h6 Bc8-g4+ 5.f2-f3 Rb6-b3 6.Qc3-d2
-/+ (-0.77) Depth: 9 00:00:03 1277kN
1...Rb6-f6 2.Qd2-c3 Qb3-b7 3.Rb1-h1 Rf6-b6 4.Kf3-g3 Bc8-f5 5.Rh1-g1 Rb6xb2 6.Ra1xa7
=/+ (-0.70) Depth: 10 00:00:09 3372kN
1...Qb3-b5 2.Rb1-h1 Qb5-d7 3.Ra1-g1 Qd7-e7 4.Kf3-g3 Qe7-b7 5.h5-h6 Rb6xb2 6.h6-h7+ Kg8-h8 7.Qd2-a5
-/+ (-0.80) Depth: 10 00:00:13 5124kN
1...Qb3-b5 2.Rb1-h1 Qb5-d7 3.Ra1-g1 Qd7-e6 4.Qd2-c2 Qe6-f5 5.Qc2-d2 Qf5-e4+ 6.Kf3-g3 Bc8-d7 7.f2-f3 Qe4-f5
-/+ (-0.86) Depth: 11 00:00:26 10370kN
1...g7-g5 2.Qd2-c3 g5xf4 3.e3xf4 Kg8-h8 4.Rb1-e1 Rb6-f6 5.Qc3xb3 Rf6xf4+ 6.Kf3-g2 Rf4xf2+ 7.Kg2-g3 c4xb3 8.Ra1xa7 Rf2xb2
-+ (-2.69) Depth: 11 00:01:07 27897kN
1...g7-g5 2.Qd2-c3 g5xf4 3.e3xf4 Rb6-f6 4.Rb1-g1+ Kg8-h8 5.Qc3xb3 Rf6xf4+ 6.Kf3-e2 Rf4xf2+ 7.Ke2-e1 c4xb3 8.Ra1xa7 Rf2xb2 9.Rg1-g7
-+ (-2.72) Depth: 12 00:01:39 41919kN



Analysis by Deep Junior 8.ZX:

1...Bc8-f5 2.Rb1-g1 Rf8-f7 3.Kf3-g2 Bf5-e4+ 4.Kg2-h2 Qb3xb2 5.Qd2xb2 Rb6xb2 6.Bf4-g3
=/+ (-0.39) Depth: 12 00:00:04 6726kN
1...Rf8-f5 2.Ra1-a3 Qb3-b5 3.Kf3-g2 Qb5-e8 4.Qd2-c2 Qe8xh5 5.Rb1-g1 Rb6-g6+ 6.Bf4-g3 a7-a6
=/+ (-0.47) Depth: 12 00:00:05 6726kN
1...Rf8-f5 2.Qd2-d1 Qb3xd1+ 3.Rb1xd1 a7-a6 4.Rd1-h1 Kg8-f7 5.Ra1-a2 Rb6-h6 6.e3-e4 d5xe4+ 7.Kf3xe4 Rh6xh5 8.Rh1xh5
= (-0.24) Depth: 15 00:01:16 128mN
1...g7-g5!
-/+ (-0.77) Depth: 15 00:01:51 141mN
1...g7-g5 2.Qd2-c3 g5xf4 3.Rb1-g1+ Kg8-h8 4.e3xf4 Rb6-f6 5.Rg1-g6 Rf6xf4+ 6.Kf3-g2 Rf4xf2+ 7.Kg2-g1 Qb3-b8 8.Rg6-h6+ Kh8-g8 9.Rh6-g6+ Kg8-h7 10.Qc3-g3 Qb8xg3+
-+ (-3.34) Depth: 15 00:06:58 141mN



Analysis by Rybka 1.1 32-bit:

1...Bc8-f5 2.Rb1-g1 Qb3xb2 3.Qd2xb2 Rb6xb2 4.Ra1xa7 Rf8-f7 5.Ra7-a5
= (0.16) Depth: 9 00:00:03 129kN
1...Rf8-f7 2.Kf3-g3 Bc8-f5 3.Ra1-a3 Qb3-b4 4.Qd2xb4 Rb6xb4 5.Rb1-a1
= (0.12) Depth: 9 00:00:03 150kN
1...Qb3-b5 2.Rb1-h1 Rf8-f7 3.Rh1-g1 Qb5xb2 4.Qd2xb2 Rb6xb2 5.Ra1-a5 Bc8-e6
= (0.00) Depth: 9 00:00:05 227kN
1...Qb3-b5 2.Rb1-h1 Rf8-f7 3.Kf3-g3 Qb5xb2 4.Qd2xb2 Rb6xb2 5.Ra1-a5 Bc8-e6 6.Ra5-a6
= (-0.08) Depth: 10 00:00:09 390kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Rb1-g1 Qb6-e6 4.Qc3-c2 Qe6-h3+ 5.Kf3-e2 Rf8-e8
= (-0.11) Depth: 10 00:00:12 518kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Kf3-e2 Rf6xf4 4.e3xf4 Rf8xf4 5.Rb1-g1 Bc8-f5 6.f2-f3 Rf4-h4
= (-0.14) Depth: 11 00:00:15 637kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Kf3-e2 Qb6-e6 4.Ke2-d2 Rf6xf4 5.e3xf4 Rf8xf4 6.Rb1-f1 Qe6-b6 7.Kd2-c1
= (-0.25) Depth: 12 00:00:23 981kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Kf3-e2 Qb6-e6 4.Ke2-d2 Rf6xf4 5.e3xf4 Rf8xf4 6.Rb1-f1 Qe6-b6 7.Kd2-c1 Bc8-g4
= (-0.09) Depth: 13 00:00:32 1429kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Rb1-g1 Qb6-e6 4.Qc3-c2 Qe6-f7 5.Rg1-g3 Bc8-f5 6.Qc2-d1 Rf8-b8 7.Qd1-c1
=/+ (-0.43) Depth: 14 00:01:12 3247kN
1...g7-g5 2.Qd2-c3 g5xf4 3.Rb1-g1+ Kg8-h8 4.e3xf4 Rb6-f6 5.Qc3xb3 c4xb3 6.Ra1xa7 Rf6xf4+ 7.Kf3-e3 Rf4xf2 8.Rg1-g3
-+ (-2.62) Depth: 14 00:05:32 14331kN
1...g7-g5 2.Qd2-c3 g5xf4 3.e3xf4 Rb6-f6 4.Rb1-g1+ Kg8-h8 5.Qc3xb3 c4xb3 6.Kf3-e3 Rf6xf4 7.Ra1xa7 Rf4xf2 8.Rg1-g3
-+ (-2.63) Depth: 15 00:06:21 16583kN
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Orlov

Re: hard tactical test for chess engines

Post by Orlov »

George Tsavdaris wrote:
Orlov wrote: next wonderfull position(also from it very old book):

2b2rk1/p5p1/1r6/3p3P/2pP1B2/1q2PK2/1P1Q1P2/RR6 b - - g5!!

Strange, but engines what I have dont see great move g5!!
It seems i'm Chess engine's addicted. :D I predicted that 3 specific engines will find this move. And they found it! Others failed....
My favorite personality XQ9 in Chessmaster 10000 finds it very quickly, 67 seconds, in a comparably old machine(AMD3500+ 2.2GHz).
Also Deep Junior 8.ZX, an old Junior version, finds it in 1.85 minutes.
Also Rybka 1.1 32bit finds this in 5:32 minutes.

Analysis by XQ9 Chessmaster 10000:

1...Bc8-f5 2.Rb1-g1 Rf8-f7 3.Kf3-g3 Qb3xb2 4.Qd2xb2 Rb6xb2 5.Rg1-c1 Bf5-e4
-/+ (-1.02) Depth: 7 00:00:01 235kN
1...Bc8-f5 2.Rb1-g1 Rf8-f7 3.Ra1-a5 Bf5-e4+ 4.Kf3-g3 Rb6-f6 5.Kg3-h4 Qb3-b6
=/+ (-0.58) Depth: 8 00:00:01 405kN
1...Rb6-f6 2.Qd2-c3 Qb3-b7 3.Ra1-a5 Bc8-f5 4.Rb1-a1 Bf5-e4+ 5.Kf3-e2 a7-a6
-/+ (-0.71) Depth: 8 00:00:02 726kN
1...Rb6-f6 2.Qd2-c3 Qb3-b7 3.Kf3-e2 Rf6-b6 4.h5-h6 Bc8-g4+ 5.f2-f3 Rb6-b3 6.Qc3-d2
-/+ (-0.77) Depth: 9 00:00:03 1277kN
1...Rb6-f6 2.Qd2-c3 Qb3-b7 3.Rb1-h1 Rf6-b6 4.Kf3-g3 Bc8-f5 5.Rh1-g1 Rb6xb2 6.Ra1xa7
=/+ (-0.70) Depth: 10 00:00:09 3372kN
1...Qb3-b5 2.Rb1-h1 Qb5-d7 3.Ra1-g1 Qd7-e7 4.Kf3-g3 Qe7-b7 5.h5-h6 Rb6xb2 6.h6-h7+ Kg8-h8 7.Qd2-a5
-/+ (-0.80) Depth: 10 00:00:13 5124kN
1...Qb3-b5 2.Rb1-h1 Qb5-d7 3.Ra1-g1 Qd7-e6 4.Qd2-c2 Qe6-f5 5.Qc2-d2 Qf5-e4+ 6.Kf3-g3 Bc8-d7 7.f2-f3 Qe4-f5
-/+ (-0.86) Depth: 11 00:00:26 10370kN
1...g7-g5 2.Qd2-c3 g5xf4 3.e3xf4 Kg8-h8 4.Rb1-e1 Rb6-f6 5.Qc3xb3 Rf6xf4+ 6.Kf3-g2 Rf4xf2+ 7.Kg2-g3 c4xb3 8.Ra1xa7 Rf2xb2
-+ (-2.69) Depth: 11 00:01:07 27897kN
1...g7-g5 2.Qd2-c3 g5xf4 3.e3xf4 Rb6-f6 4.Rb1-g1+ Kg8-h8 5.Qc3xb3 Rf6xf4+ 6.Kf3-e2 Rf4xf2+ 7.Ke2-e1 c4xb3 8.Ra1xa7 Rf2xb2 9.Rg1-g7
-+ (-2.72) Depth: 12 00:01:39 41919kN



Analysis by Deep Junior 8.ZX:

1...Bc8-f5 2.Rb1-g1 Rf8-f7 3.Kf3-g2 Bf5-e4+ 4.Kg2-h2 Qb3xb2 5.Qd2xb2 Rb6xb2 6.Bf4-g3
=/+ (-0.39) Depth: 12 00:00:04 6726kN
1...Rf8-f5 2.Ra1-a3 Qb3-b5 3.Kf3-g2 Qb5-e8 4.Qd2-c2 Qe8xh5 5.Rb1-g1 Rb6-g6+ 6.Bf4-g3 a7-a6
=/+ (-0.47) Depth: 12 00:00:05 6726kN
1...Rf8-f5 2.Qd2-d1 Qb3xd1+ 3.Rb1xd1 a7-a6 4.Rd1-h1 Kg8-f7 5.Ra1-a2 Rb6-h6 6.e3-e4 d5xe4+ 7.Kf3xe4 Rh6xh5 8.Rh1xh5
= (-0.24) Depth: 15 00:01:16 128mN
1...g7-g5!
-/+ (-0.77) Depth: 15 00:01:51 141mN
1...g7-g5 2.Qd2-c3 g5xf4 3.Rb1-g1+ Kg8-h8 4.e3xf4 Rb6-f6 5.Rg1-g6 Rf6xf4+ 6.Kf3-g2 Rf4xf2+ 7.Kg2-g1 Qb3-b8 8.Rg6-h6+ Kh8-g8 9.Rh6-g6+ Kg8-h7 10.Qc3-g3 Qb8xg3+
-+ (-3.34) Depth: 15 00:06:58 141mN



Analysis by Rybka 1.1 32-bit:

1...Bc8-f5 2.Rb1-g1 Qb3xb2 3.Qd2xb2 Rb6xb2 4.Ra1xa7 Rf8-f7 5.Ra7-a5
= (0.16) Depth: 9 00:00:03 129kN
1...Rf8-f7 2.Kf3-g3 Bc8-f5 3.Ra1-a3 Qb3-b4 4.Qd2xb4 Rb6xb4 5.Rb1-a1
= (0.12) Depth: 9 00:00:03 150kN
1...Qb3-b5 2.Rb1-h1 Rf8-f7 3.Rh1-g1 Qb5xb2 4.Qd2xb2 Rb6xb2 5.Ra1-a5 Bc8-e6
= (0.00) Depth: 9 00:00:05 227kN
1...Qb3-b5 2.Rb1-h1 Rf8-f7 3.Kf3-g3 Qb5xb2 4.Qd2xb2 Rb6xb2 5.Ra1-a5 Bc8-e6 6.Ra5-a6
= (-0.08) Depth: 10 00:00:09 390kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Rb1-g1 Qb6-e6 4.Qc3-c2 Qe6-h3+ 5.Kf3-e2 Rf8-e8
= (-0.11) Depth: 10 00:00:12 518kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Kf3-e2 Rf6xf4 4.e3xf4 Rf8xf4 5.Rb1-g1 Bc8-f5 6.f2-f3 Rf4-h4
= (-0.14) Depth: 11 00:00:15 637kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Kf3-e2 Qb6-e6 4.Ke2-d2 Rf6xf4 5.e3xf4 Rf8xf4 6.Rb1-f1 Qe6-b6 7.Kd2-c1
= (-0.25) Depth: 12 00:00:23 981kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Kf3-e2 Qb6-e6 4.Ke2-d2 Rf6xf4 5.e3xf4 Rf8xf4 6.Rb1-f1 Qe6-b6 7.Kd2-c1 Bc8-g4
= (-0.09) Depth: 13 00:00:32 1429kN
1...Rb6-f6 2.Qd2-c3 Qb3-b6 3.Rb1-g1 Qb6-e6 4.Qc3-c2 Qe6-f7 5.Rg1-g3 Bc8-f5 6.Qc2-d1 Rf8-b8 7.Qd1-c1
=/+ (-0.43) Depth: 14 00:01:12 3247kN
1...g7-g5 2.Qd2-c3 g5xf4 3.Rb1-g1+ Kg8-h8 4.e3xf4 Rb6-f6 5.Qc3xb3 c4xb3 6.Ra1xa7 Rf6xf4+ 7.Kf3-e3 Rf4xf2 8.Rg1-g3
-+ (-2.62) Depth: 14 00:05:32 14331kN
1...g7-g5 2.Qd2-c3 g5xf4 3.e3xf4 Rb6-f6 4.Rb1-g1+ Kg8-h8 5.Qc3xb3 c4xb3 6.Kf3-e3 Rf6xf4 7.Ra1xa7 Rf4xf2 8.Rg1-g3
-+ (-2.63) Depth: 15 00:06:21 16583kN

What about first diagram? Nxg5!

:D
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smirobth
Posts: 2307
Joined: Wed Mar 08, 2006 8:41 pm
Location: Brownsville Texas USA

Re: hard tactical test for chess engines

Post by smirobth »

George Tsavdaris wrote:
Orlov wrote: next wonderfull position(also from it very old book):

2b2rk1/p5p1/1r6/3p3P/2pP1B2/1q2PK2/1P1Q1P2/RR6 b - - g5!!

Strange, but engines what I have dont see great move g5!!
It seems i'm Chess engine's addicted. :D I predicted that 3 specific engines will find this move. And they found it! Others failed....
Hiarcs 11.1 found it in 4 seconds on my computer.
- Robin Smith
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