Djaja study, Big deal! Bright finds the line faster than ...

[Uri Blass]

sure ted, you really have everyones sympathies, having to chug along w/ a quad laptop...-_-


i think some of the mavens here should try out for this ---

Send us an insoluble study!

That's that. Are there any studies that these monsters cannot solve? Anyone who sends us a nice puzzle – something as elegant as the position above – which chess engines cannot figure out, can win a Deep Fritz 11 signed by all the players of the Dortmund tournament. Maximum three. Please use the feedback button on the left side of this page and give "Computer puzzle" as the subject line (anything else may cause your letter to be ignored). And please give us the position and solution in PGN.

i'm sure at least 3 people here know of insoluble (by current engines) puzzles!

Here is a possible candidate that I sent them(it is a known study by Y.Hoch and H.Aloni)

[d]1R3b2/5ppQ/6Pp/6PP/R6P/P7/7K/2q1k3 w - - 0 0 bm Rb1

[Uri Blass]

I can add that yace can find it after some human analysis but I do not know if there is a program that can find it from the root position without help by humans.

1347: New game - Rybka 3 1-cpu 32-bit
[d]1R3b2/5ppQ/6Pp/6PP/R6P/P7/7K/2q1k3 w - - 0 1

Analysis by Yace 0.99.87:

1.Rb8xf8
+- (11.78) Depth: 1 00:00:00
1.Ra4-e4+ Ke1-d2 2.Rb8xf8 Qc1xa3 3.Rf8xf7 h6xg5
+- (11.81) Depth: 1 00:00:00
1.Ra4-e4+ Ke1-d1 2.Rb8xf8
+- (12.15) Depth: 1 00:00:00
1.Ra4-e4+ Ke1-d1 2.Rb8xf8
+- (12.15) Depth: 1 00:00:00
1.Ra4-e4+ Ke1-d1 2.Re4-d4+ Kd1-e1 3.Rb8xf8
+- (12.19) Depth: 2 00:00:00
1.Ra4-e4+ Ke1-d1 2.Re4-d4+ Kd1-e1 3.Rb8xf8
+- (12.19) Depth: 2 00:00:00
1.Ra4-e4+ Ke1-f1 2.Re4-a4
+- (11.79) Depth: 3 00:00:00
1.Ra4-e4+ Ke1-f1 2.g6xf7 Qc1xa3
+- (10.66) Depth: 3 00:00:00
1.Ra4-e4+ Ke1-f1 2.Rb8xf8 Qc1-c2+ 3.Kh2-h3 Qc2xe4 4.Rf8xf7+ Kf1-e1 5.Qh7xg7
+- (9.49) Depth: 3 00:00:00
1.Ra4-e4+ Ke1-f1 2.Rb8xf8 Qc1-c2+ 3.Kh2-h3 Qc2xe4 4.Rf8xf7+ Kf1-e1 5.Qh7xg7
+- (9.49) Depth: 3 00:00:00
1.Ra4-e4+ Ke1-f1 2.Rb8xf8 Qc1-c2+ 3.Re4-e2 Qc2xe2+ 4.Kh2-h3
+- (9.09) Depth: 4 00:00:00
1.Ra4-e4+ Ke1-f2 2.Rb8xf8 Qc1-c7+ 3.Re4-e5 Qc7xe5+ 4.Kh2-h1
+- (8.09) Depth: 4 00:00:00
1.Ra4-e4+ Ke1-f2 2.Re4-e2+ Kf2xe2 3.Rb8xf8
+- (6.75) Depth: 4 00:00:00
1.Rb8xf8 Qc1-c2+ 2.Kh2-h3 Qc2-b3+ 3.Kh3-g2 Ke1-e2
+- (6.76) Depth: 4 00:00:00
1.Rb8xf8 Qc1-c2+ 2.Kh2-h3 Qc2xa4 3.Qh7xg7 Qa4xa3+ 4.Kh3-g4
+- (7.16) Depth: 4 00:00:00
1.Rb8-e8+ Ke1-f1 2.Kh2-g3 Qc1-c2
+- (7.17) Depth: 4 00:00:00
1.Rb8-e8+ Ke1-f2 2.g6xf7 Qc1-c7+ 3.Re8-e5 Qc7xe5+ 4.Kh2-h3
+- (7.16) Depth: 4 00:00:00
1.Rb8xf8 Qc1-c2+ 2.Kh2-h3 Qc2xa4 3.Qh7xg7 Qa4xa3+ 4.Kh3-g4
+- (7.16) Depth: 4 00:00:00
1.Rb8xf8 Qc1-c2+ 2.Kh2-h3 Qc2xa4 3.Qh7xg7 Qa4xa3+ 4.Kh3-g4
+- (7.16) Depth: 4/19 00:00:00
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5
+- (6.77) Depth: 5/19 00:00:00
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5
+- (6.77) Depth: 5/19 00:00:00
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5 Qa4-a5+ 5.Ke5-e4 Qa5-a4+ 6.Ke4-d5 Qa4-d7+ 7.Kd5-c4 Qd7-a4+ 8.Kc4-c3 f7xg6 9.Qh7xg7 h6xg5 10.h4xg5 g6xh5
+- (6.37) Depth: 6/22 00:00:00 172kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-f3 Qa4xa3+ 5.Kf3-e4 Qa3xf8 6.Ke4-f3
+- (5.37) Depth: 6/24 00:00:01 177kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-g2 Qb3-b7+ 4.Kg2-h3 Qb7-b3+ 5.Kh3-h2 Qb3xa4 6.Rf8-a8 Qa4xa8 7.g6xf7
+- (5.36) Depth: 6/24 00:00:01 250kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-g2 Qb3-b7+ 4.Kg2-h3 Qb7-b3+ 5.Kh3-h2 Qb3xa4 6.Rf8-a8 Qa4xa8 7.g6xf7
+- (5.36) Depth: 6/25 00:00:01 660kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-g2 Qb3xa4 4.Qh7xh6 g7xh6 5.g5xh6
+- (4.96) Depth: 7/25 00:00:01 666kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-g2 Qb3xa4 4.Qh7xh6 g7xh6 5.g5xh6
+- (3.96) Depth: 7/25 00:00:01 688kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5 Qa4-b5+ 5.Ke5-d6 Qb5-b6+ 6.Kd6-d5 Qb6-e6+ 7.Kd5-c5 Qe6-e7+ 8.Kc5-d4 Qe7-d6+ 9.Kd4-c4 Qd6xf8 10.g5xh6
+- (3.28) Depth: 7/26 00:00:01 1009kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5 Qa4-b5+ 5.Ke5-d6 Qb5-b6+ 6.Kd6-d5 Qb6-e6+ 7.Kd5-c5 Qe6-e7+ 8.Kc5-d4 Qe7-d6+ 9.Kd4-c4 Qd6xf8 10.g5xh6
+- (3.28) Depth: 7/27 00:00:03 3188kN
1.Rb8xf8 Qc1-c2+ 2.Kh2-g3 Qc2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5 Qa4-b5+ 5.Ke5-d6 Qb5-b6+ 6.Kd6-d7 Qb6-e6+ 7.Kd7-c7 Qe6-e7+ 8.Kc7-c6 Qe7xf8 9.g5xh6
+- (3.24) Depth: 8/27 00:00:03 3844kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 8/29 00:00:04 4723kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 8/29 00:00:04 4723kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 8/29 00:00:06 6507kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 9/29 00:00:06 6507kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 9/33 00:00:11 12599kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 10/33 00:00:11 12599kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 10/36 00:00:34 32550kN
1.Rb8-b1 Qc1xb1 2.g6xf7 Bf8-d6+ 3.Kh2-h1 Qb1-d1 4.f7-f8Q Bd6xf8 5.Ra4-f4 h6xg5 6.h4xg5 Bf8-c5 7.Qh7-e4+ Ke1-d2+ 8.Kh1-g2 Qd1-g1+ 9.Kg2-f3 Qg1-h1+ 10.Kf3-g4 Qh1xe4 11.Rf4xe4 Bc5xa3 12.Kg4-f5 Kd2-c3
+- (3.28) Depth: 11/36 00:00:34 32550kN

(so k, 21.08.2009)

[Uri Blass]

analysis by rybka in 6 option mode

depth 13:

1347: New game - Rybka 3 1-cpu 32-bit
1R3b2/5ppQ/6Pp/6PP/R6P/P7/7K/2q1k3 w - - 0 1

Analysis by Rybka 3 1-cpu 32-bit :

1. = (0.00): 1.Rb8xf8 Qc1-b2+ 2.Kh2-g3 Qb2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5 Qa4-b5+ 5.Ke5-d6 Qb5-b6+ 6.Kd6-d5 Qb6-b5+
2. = (0.00): 1.g6xf7 Bf8-d6+ 2.Kh2-h3 Qc1-e3+ 3.Kh3-g4 Qe3-e6+ 4.Qh7-f5 Qe6-e2+ 5.Qf5-f3 Qe2-e6+ 6.Qf3-f5 Qe6-e2+ 7.Qf5-f3 Qe2-e6+ 8.Qf3-f5 Qe6-e2+ 9.Qf5-f3 Qe2-e6+ 10.Qf3-f5 Qe6-e2+ 11.Qf5-f3 Qe2-e6+ 12.Qf3-f5 Qe6-e2+ 13.Qf5-f3 Qe2-e6+ 14.Qf3-f5 Qe6-e2+ 15.Qf5-f3 Qe2-e6+ 16.Qf3-f5
3. = (0.00): 1.Rb8-b6 Ke1-f2 2.Ra4-g4 Qc1-c7+ 3.Kh2-h1 Qc7-c1+ 4.Kh1-h2 Qc1-c7+ 5.Kh2-h1 Qc7-c1+ 6.Kh1-h2 Qc1-c7+ 7.Kh2-h1 Qc7-c1+ 8.Kh1-h2 Qc1-c7+ 9.Kh2-h1 Qc7-c1+ 10.Kh1-h2 Qc1-c7+ 11.Kh2-h1 Qc7-c1+ 12.Kh1-h2 Qc1-c7+ 13.Kh2-h1 Qc7-c1+ 14.Kh1-h2 Qc1-c7+ 15.Kh2-h1 Qc7-c1+ 16.Kh1-h2
4. = (0.00): 1.Ra4-e4+ Ke1-f2 2.Re4-e2+ Kf2xe2 3.Rb8xf8 Qc1-f4+ 4.Kh2-h3 Qf4-f3+ 5.Kh3-h2 Qf3-f4+ 6.Kh2-h3 Qf4-f3+ 7.Kh3-h2 Qf3-f4+ 8.Kh2-h3 Qf4-f3+ 9.Kh3-h2 Qf3-f4+ 10.Kh2-h3 Qf4-f3+ 11.Kh3-h2 Qf3-f4+ 12.Kh2-h3 Qf4-f3+ 13.Kh3-h2 Qf3-f4+ 14.Kh2-h3 Qf4-f3+ 15.Kh3-h2 Qf3-f4+ 16.Kh2-h3
5. = (0.00): 1.Rb8-d8 Ke1-f2 2.Ra4-g4 Qc1-c7+ 3.Kh2-h3 Qc7-c3+ 4.Kh3-h2 Bf8-d6+ 5.Rd8xd6 Qc3-e5+ 6.Kh2-h3 Qe5-e3+ 7.Kh3-h2 Qe3-e5+ 8.Kh2-h3 Qe5-e3+ 9.Kh3-h2 Qe3-e5+ 10.Kh2-h3 Qe5-e3+ 11.Kh3-h2 Qe3-e5+ 12.Kh2-h3 Qe5-e3+ 13.Kh3-h2 Qe3-e5+ 14.Kh2-h3 Qe5-e3+ 15.Kh3-h2 Qe3-e5+ 16.Kh2-h3
6. -+ (-2.22): 1.Rb8-b1 Qc1xb1 2.g6xf7 Qb1xh7 3.g5-g6 Qh7-h8 4.Ra4-e4+ Ke1-d2 5.Re4-e8 Kd2-c3 6.Kh2-h3 Kc3-c4 7.Kh3-g4 Kc4-b5

(so k, 21.08.2009)

depth 15:

1347: New game - Rybka 3 1-cpu 32-bit
1R3b2/5ppQ/6Pp/6PP/R6P/P7/7K/2q1k3 w - - 0 1

Analysis by Rybka 3 1-cpu 32-bit :

1. = (0.00): 1.Rb8xf8 Qc1-b2+ 2.Kh2-g3 Qb2-b3+ 3.Kg3-f4 Qb3xa4+ 4.Kf4-e5 Qa4-b5+ 5.Ke5-d6 Qb5-b6+ 6.Kd6-d5 Qb6-b5+ 7.Kd5-d4 Qb5-b6+
2. = (0.00): 1.g6xf7 Bf8-d6+ 2.Kh2-h3 Qc1-e3+ 3.Kh3-g4 Qe3-e6+ 4.Qh7-f5 Qe6-e2+ 5.Qf5-f3 Qe2-e6+ 6.Qf3-f5 Qe6-e2+ 7.Qf5-f3 Qe2-e6+ 8.Qf3-f5 Qe6-e2+ 9.Qf5-f3 Qe2-e6+ 10.Qf3-f5 Qe6-e2+ 11.Qf5-f3 Qe2-e6+ 12.Qf3-f5 Qe6-e2+ 13.Qf5-f3 Qe2-e6+ 14.Qf3-f5 Qe6-e2+ 15.Qf5-f3 Qe2-e6+ 16.Qf3-f5
3. = (0.00): 1.Rb8-b6 Ke1-f2 2.Ra4-g4 Qc1-c7+ 3.Kh2-h1 Qc7-c1+ 4.Kh1-h2 Qc1-c7+ 5.Kh2-h1 Qc7-c1+ 6.Kh1-h2 Qc1-c7+ 7.Kh2-h1 Qc7-c1+ 8.Kh1-h2 Qc1-c7+ 9.Kh2-h1 Qc7-c1+ 10.Kh1-h2 Qc1-c7+ 11.Kh2-h1 Qc7-c1+ 12.Kh1-h2 Qc1-c7+ 13.Kh2-h1 Qc7-c1+ 14.Kh1-h2 Qc1-c7+ 15.Kh2-h1 Qc7-c1+ 16.Kh1-h2
4. = (0.00): 1.Ra4-e4+ Ke1-f2 2.Re4-e2+ Kf2xe2 3.Rb8xf8 Qc1-f4+ 4.Kh2-h3 Qf4-f3+ 5.Kh3-h2 Qf3-f4+ 6.Kh2-h3 Qf4-f3+ 7.Kh3-h2 Qf3-f4+ 8.Kh2-h3 Qf4-f3+ 9.Kh3-h2 Qf3-f4+ 10.Kh2-h3 Qf4-f3+ 11.Kh3-h2 Qf3-f4+ 12.Kh2-h3 Qf4-f3+ 13.Kh3-h2 Qf3-f4+ 14.Kh2-h3 Qf4-f3+ 15.Kh3-h2 Qf3-f4+ 16.Kh2-h3
5. = (0.00): 1.Rb8-d8 Ke1-f2 2.Ra4-g4 Qc1-c7+ 3.Kh2-h3 Qc7-c3+ 4.Kh3-h2 Bf8-d6+ 5.Rd8xd6 Qc3-e5+ 6.Kh2-h3 Qe5-e3+ 7.Kh3-h2 Qe3-e5+ 8.Kh2-h3 Qe5-e3+ 9.Kh3-h2 Qe3-e5+ 10.Kh2-h3 Qe5-e3+ 11.Kh3-h2 Qe3-e5+ 12.Kh2-h3 Qe5-e3+ 13.Kh3-h2 Qe3-e5+ 14.Kh2-h3 Qe5-e3+ 15.Kh3-h2 Qe3-e5+ 16.Kh2-h3
6. -+ (-1.85): 1.Rb8-b1 Qc1xb1 2.g6xf7 Qb1xh7 3.g5-g6 Qh7-h8 4.Ra4-e4+ Ke1-d2 5.Re4-e8 Kd2-c3 6.Kh2-h3 Kc3-c4 7.Kh3-g4 Kc4-b5 8.Kg4-f5 Kb5-c5 9.Kf5-g4 Kc5-c6 10.a3-a4 Kc6-b6 11.Kg4-f5

(so k, 21.08.2009)