Another chess problem cooked by engines

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jp
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Re: Another chess problem cooked by engines

Post by jp »

acase wrote: ↑Sat Jul 16, 2022 9:56 pm This is a white to play and win, however the engines seem to think this is a draw:

8/2pp1ppp/8/1pPP1PPk/8/8/PP6/6K1 w - - 0 1

I am of course not ruling out the possibility that the engines are wrong {and so am I).
The critical point seems to be on Black's 3rd move where Troitzky gives 3...Kg5? which loses instead of the engine improvement 3...Kg4! which appears to hold onto the draw.
Andrew, can you see if the engines approve if we shift the White King to g2 in the starting position?

If that wins (with no dual solution), I wonder why Troitzky stuck the King right at the edge. (I'm assuming that the starting position was correctly shown in the book. Incorrect transmission is of course another possibility in general.)
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acase
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Re: Another chess problem cooked by engines

Post by acase »

jp wrote: ↑Fri Jul 22, 2022 11:16 am
acase wrote: ↑Sat Jul 16, 2022 9:56 pm This is a white to play and win, however the engines seem to think this is a draw:

8/2pp1ppp/8/1pPP1PPk/8/8/PP6/6K1 w - - 0 1

I am of course not ruling out the possibility that the engines are wrong {and so am I).
The critical point seems to be on Black's 3rd move where Troitzky gives 3...Kg5? which loses instead of the engine improvement 3...Kg4! which appears to hold onto the draw.
Andrew, can you see if the engines approve if we shift the White King to g2 in the starting position?

If that wins (with no dual solution), I wonder why Troitzky stuck the King right at the edge. (I'm assuming that the starting position was correctly shown in the book. Incorrect transmission is of course another possibility in general.)
Clearly with the king on g2 it is a win, but i found 2 other sources after googling the fen which suggests the the book had the original postion correct, unless of course they were using the same book and it was a misprint :lol:

https://chessdailynews.com/a-puzzle-to- ... our-brain/

http://9148.od.ua/provedenie-peshki-v-ferzi/
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Ajedrecista
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Location: Madrid, Spain.

Re: Another chess problem cooked by engines.

Post by Ajedrecista »

Hello:
acase wrote: ↑Fri Jul 22, 2022 11:46 am
jp wrote: ↑Fri Jul 22, 2022 11:16 am
acase wrote: ↑Sat Jul 16, 2022 9:56 pm This is a white to play and win, however the engines seem to think this is a draw:

8/2pp1ppp/8/1pPP1PPk/8/8/PP6/6K1 w - - 0 1

I am of course not ruling out the possibility that the engines are wrong {and so am I).
The critical point seems to be on Black's 3rd move where Troitzky gives 3...Kg5? which loses instead of the engine improvement 3...Kg4! which appears to hold onto the draw.
Andrew, can you see if the engines approve if we shift the White King to g2 in the starting position?

If that wins (with no dual solution), I wonder why Troitzky stuck the King right at the edge. (I'm assuming that the starting position was correctly shown in the book. Incorrect transmission is of course another possibility in general.)
Clearly with the king on g2 it is a win, but i found 2 other sources after googling the fen which suggests the the book had the original postion correct, unless of course they were using the same book and it was a misprint :lol:

https://chessdailynews.com/a-puzzle-to- ... our-brain/

http://9148.od.ua/provedenie-peshki-v-ferzi/
I see that there is a doubt about the white king on g1 or g2. I found a magazine in Spanish language where the problem is listed in its two versions, first the white king on g1 and then the version with the king on g2 and the word 'correction':

Estudios Artísticos de Ajedrez. Correcciones—Recreaciones. Año 2012 - Parte XI.

Page 60 of the issue, problem No. 64410. The magazine proposes corrections, so the original problem might have the white king on g1 and later on, some people found that the problem was cooked and proposed a solution with a slightly modified position.

------------

I was not able to find the original source Deutsche Schachzeitung, 1913 (1391). I found other similar problem of the same author at PDB Die Schwalbe database with the exact same source, including (1391):

[d]8/2pp2pp/8/2PP1P2/1p5k/8/PP4p1/6K1 w - - 0 1

This last problem is much easier to find and has some reprints.

Regards from Spain.

Ajedrecista.
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jp
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Re: Another chess problem cooked by engines.

Post by jp »

Ajedrecista wrote: ↑Sat Jul 23, 2022 1:14 pm
acase wrote: ↑Fri Jul 22, 2022 11:46 am ... i found 2 other sources after googling the fen which suggests the the book had the original position correct, unless of course they were using the same book and it was a misprint :lol:

https://chessdailynews.com/a-puzzle-to- ... our-brain/

http://9148.od.ua/provedenie-peshki-v-ferzi/
I see that there is a doubt about the white king on g1 or g2. I found a magazine in Spanish language where the problem is listed in its two versions, first the white king on g1 and then the version with the king on g2 and the word 'correction':

Estudios Artísticos de Ajedrez. Correcciones—Recreaciones. Año 2012 - Parte XI.

Page 60 of the issue, problem No. 64410. The magazine proposes corrections, so the original problem might have the white king on g1 and later on, some people found that the problem was cooked and proposed a solution with a slightly modified position.
Thanks, both of you. That's interesting.

Ajedrecista, I assume the issue of the magazine is from 2012, right? Does the magazine regularly propose corrections to studies, or does this seem like a one-off thing?
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Ajedrecista
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Location: Madrid, Spain.

Re: Another chess problem cooked by engines.

Post by Ajedrecista »

Hello:
jp wrote: ↑Mon Jul 25, 2022 12:25 pmThanks, both of you. That's interesting.

Ajedrecista, I assume the issue of the magazine is from 2012, right? Does the magazine regularly propose corrections to studies, or does this seem like a one-off thing?
Yes, that issue is from year 2012. If you search:

Code: Select all

Estudios Artísticos de Ajedrez. Correcciones-Recreaciones
In Google, you will find more issues, so it does not look like a one-off thing. I found the site of the editors, where you can reach the corrections section:

Unión Argentina de Problemistas de Ajedrez

↓

Unión Argentina de Problemistas de Ajedrez. Estudios Observados : Correcciones-Recreaciones

You can download some PDFs (first: Part I from 2012; last: Part XX from 2017). Google Translator or other online translators will help you. Enjoy!

Regards from Spain.

Ajedrecista.
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acase
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Full name: Andrew R Case

Re: Another chess problem cooked by engines

Post by acase »

This one isn't really a cook but Stockfish does find a much quicker alternate solution, a mate in 22.

[pgn][Date "1890"]
[White "Otto Blathy"]
[Black ""]
[Result "1-0"]
[SetUp "1"]
[FEN "K7/p5p1/rpNb2p1/1p2p3/kPp5/qrQ5/4N1p1/n2B2Rb w - - 0 1"]
[PlyCount "173"]
[EventDate "1890"]

1. Qd2 Bxb4 (1... Nc2 2. Qxc2 Qa1 3. Nc3+ Ka3 4. Nxb5+ Ka4 5. Qxc4 Qxd1 6. Rxd1 g1=Q 7. Rxg1 Bxc6+ 8. Qxc6) 2. Qc3 Ra5 3. Kb7 g5 4. Kc8 Ra6 5. Kd7 Ra5 6. Ke8 Ra6 7. Kf7 Ra5 8. Kg8 Ra6 9. Kh8 Ra5 10. Kh7 Ra6 11. Kg8 Ra5 12. Kf7 Ra6 13. Ke8 Ra5 14. Kd7 Ra6 15. Kc8 Ra5 16. Kb7 g4 17. Kc8 Ra6 18. Kd7 Ra5 19. Ke8 Ra6 20. Kf7 Ra5 21. Kg8 Ra6 22. Kh7 Ra5 23. Kh8 Ra6 24. Kg8 Ra5 25. Kf7 Ra6 26. Ke8 Ra5 27. Kd7 Ra6 28. Kc8 Ra5 29. Kb7 g3 30. Kc8 Ra6 31. Kd7 Ra5 32. Ke8 Ra6 33. Kf7 Ra5 34. Kg8 Ra6 35. Kh7 Ra5 36. Kh8 Ra6 37. Kg8 Ra5 38. Kf7 Ra6 39. Ke8 Ra5 40. Kd7 Ra6 41. Kc8 Ra5 42. Kb7 42... g5 $1 43. Kc8 Ra6 44. Kd7 Ra5 45. Ke8 Ra6 46. Kf7 Ra5 47. Kg8 Ra6 48. Kh8 Ra5 49. Kh7 Ra6 50. Kg8 Ra5 51. Kf7 Ra6 52. Ke8 Ra5 53. Kd7 Ra6 54. Kc8 Ra5 55. Kb7 g4 56. Kc8 Ra6 57. Kd7 Ra5 58. Ke8 Ra6 59. Kf7 Ra5 60. Kg8 Ra6 61. Kh8 Ra5 62. Kh7 Ra6 63. Kg8 Ra5 64. Kf7 Ra6 65. Ke8 Ra5 66. Kd7 Ra6 67. Kc8 Ra5 68. Kb7 e4 69. Kc8 Ra6 70. Kd7 Ra5 71. Ke6 Ra6 72. Kf5 Ra5 73. Kxe4 Ra6 74. Kf5 Ra5 75. Kg6 Ra6 76. Kh7 Ra5 77. Kh8 Ra6 78. Kg8 Ra5 79. Kf7 Ra6 80. Ke8 Ra5 81. Kd7 Ra6 82. Kc8 Ra5 83. Kb7 a6 84. Ka8 Nc2 85. Bxc2 Bf8 86. Qxa5+ bxa5 87. Nc3# 1-0[/pgn]


and here is the FEN:
[fen]K7/p5p1/rpNb2p1/1p2p3/kPp5/qrQ5/4N1p1/n2B2Rb w - - 0 1
[/fen]

Code: Select all

FEN: K7/p5p1/rpNb2p1/1p2p3/kPp5/qrQ5/4N1p1/n2B2Rb w - - 0 1

Stockfish_22070910_x64_bmi2:
NNUE evaluation using nn-3c0054ea9860.nnue enabled
 1/1	00:00	 3k	3,225k	-7.74	1.Ka8-b7 Bd6xb4
 2/2	00:00	 4k	4,084k	-6.14	1.Ka8-b7 Bd6xb4 2.Bd1xb3+ Na1xb3 3.Kb7xa6
 3/3	00:00	 5k	2,401k	-6.14	1.Ka8-b7 Bd6xb4 2.Bd1xb3+ Na1xb3 3.Kb7xa6
 4/4	00:00	 6k	2,811k	-6.14	1.Ka8-b7 Bd6xb4 2.Bd1xb3+ Na1xb3 3.Kb7xa6
 5/5	00:00	 7k	3,522k	-6.14	1.Ka8-b7 Bd6xb4 2.Bd1xb3+ Na1xb3 3.Kb7xa6
 6/6	00:00	 9k	4,481k	-6.14	1.Ka8-b7 Bd6xb4 2.Bd1xb3+ Na1xb3 3.Kb7xa6
 7/6	00:00	 12k	5,909k	-4.78	1.Ka8-b7 e5-e4 2.Bd1xb3+ Na1xb3 3.Kb7xa6 Bd6xb4
 8/7	00:00	 16k	7,999k	-4.98	1.Ka8-b7 Bd6xb4 2.Bd1xb3+ Na1xb3 3.Kb7xa6 e5-e4
 9/13	00:00	 45k	11,216k	+0.99	1.Qc3xc4
 10/12	00:00	 63k	12,698k	+1.84	1.Qc3xc4 Qa3-a2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-b2 4.Bd1xb3 Na1xb3 5.Nb5xd6
 11/13	00:00	 88k	12,566k	+2.39	1.Qc3xc4 Qa3xb4 2.Bd1xb3+ Na1xb3 3.Ne2-c3+ Ka4-a3 4.Nc3xb5+ Qb4xb5 5.Qc4xb5 Ra6-a4
 12/13	00:00	 101k	14,486k	+4.01	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3
 13/18	00:00	 151k	15,062k	+7.87	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Ka8-b7 Ra6-a5
 14/31	00:00	 559k	15,119k	+5.74	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.b7-b8Q+ Bc7xb8 11.Ka8xb8 g6-g5 12.Rg1-b1+ Kb3-c2 13.Qa6-a2+ Kc2-d3 14.Rb1-b3
 15/27	00:00	 851k	15,203k	+5.83	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a6 10.Qd6xe5 g6-g5 11.Qe5xg5 g7-g6 12.Qg5xg6
 16/34	00:00	 1,106k	15,361k	+6.54	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 g6-g5 10.Qd6xe5 Ka2-a3 11.Qe5xg5
 17/36	00:00	 1,720k	15,779k	+7.29	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6xe5 Nb3-c5 12.Qe5-a1+ Ka3-b3
 18/31	00:00	 2,909k	15,984k	+7.62	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 e5-e4 10.Nc6-d4 Ra4-a3 11.Nd4xb3 Ka2xb3 12.Rg1-b1+ Kb3-c4 13.Rb1-c1+ Kc4-b5
 19/35	00:00	 4,061k	15,990k	+7.98	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Ka8-a7 Nb3-c1 12.Qd6xb6 Nc1-a2 13.Qb6-a6+ Ka3-b2 14.Qa6-e2+ Kb2-a3 15.Qe2xe5 Ka3-a4 16.Qe5xg7
 20/47	00:00	 7,977k	16,551k	+8.44	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 e5-e4 10.Nc6-d4 Ra4-a3 11.Nd4xb3 Ka2xb3 12.Qd6-d4 Kb3-c2 13.Qd4xe4+ Kc2-d2 14.Qe4-e1+ Kd2-d3 15.Ka8-b8 a7-a6 16.b4-b5 a6xb5 17.Qe1-g3+ Kd3-c2 18.Qg3xg6+ Kc2-d2
 21/51	00:00	 11,327k	16,830k	+8.90	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Nc6-a5+ Kb3-c2 11.b7-b8Q Bc7xb8 12.Qa6-e2+ Qc3-d2 13.Qe2-c4+ Qd2-c3 14.Rg1-c1+ Kc2xc1 15.Qc4xc3+ Kc1-b1 16.Qc3-e1+ Kb1-c2 17.Ka8xb8 Kc2-d3 18.Na5-c6 e5-e4 19.Nc6-e5+ Kd3-d4 20.Ne5xg6 e4-e3 21.Qe1-a1+ Kd4-e4
 22/49	00:01	 23,107k	17,257k	+9.84	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Qb2xb3 5.Nb5-c3+ Ka2-b2 6.Nc3-d1+ Kb2-a3 7.Qc4-c1+ Ka3-a4 8.Nd1-c3+ Qb3xc3 9.Qc1xc3 Ka4-b5 10.Nc6xa7+ Ra6xa7+ 11.Ka8xa7 Bd6xb4 12.Qc3-d3+ Kb5-c6 13.Qd3-e4+ Kc6-d7 14.Qe4xb4 Kd7-e6 15.Qb4xb6+ Ke6-f5 16.Qb6-f2+ Kf5-e6 17.Qf2-a2+ Ke6-f6
 23/51	00:02	 42,170k	17,824k	+11.12	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 Nb3-d4 13.Ka7xb6 b4-b3 14.Qd3-b1+ Ka2-a3 15.Qb1-a1+ Ka3-b4 16.Qa1-a5+ Kb4-c4 17.Qa5xe5 Nd4-c2 18.Rg1-d1 g2-g1B+ 19.Rd1xg1 Bh1-f3 20.Rg1-b1 Nc2-d4 21.Qe5-e3 Bf3-d5 22.Rb1-c1+ Nd4-c2 23.Qe3-c5+ Kc4-d3 24.Qc5xd5+ Kd3-c3
 24/38	00:03	 61,891k	18,076k	+11.79	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 Nb3-d4 13.Qd3-b1+ Ka2-a3 14.Ka7xb6 b4-b3 15.Qb1-a1+ Ka3-b4 16.Qa1-e1+ Kb4-c4 17.Qe1xe5 Nd4-c2 18.Rg1-d1 g2-g1Q+ 19.Rd1xg1 Bh1-f3
 25/56+	00:05	 100,047k	18,452k	+12.99	1.Qc3xc4
 25/56	00:05	 106,115k	18,484k	+13.37	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 Ka2-b2 12.b4xa5 Kb2-c3 13.a5-a6 g6-g5 14.a6-a7 Kc3-c2 15.Qd6-d1+ Kc2-c3 16.Qd1-e2 g5-g4 17.Qe2-e3+ Kc3-b2 18.Kb6-b5 Ra4xa7 19.Qe3xa7 Nb3-c5 20.Qa7xg7+ Kb2-b3 21.Qg7-a1
 26/59+	00:10	 195,550k	19,127k	+15.00	1.Qc3xc4
 26/59	00:12	 237,006k	19,385k	+15.69	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 b6-b5 11.b4xa5 Ra4-c4 12.Ka7-b6 Ka2-b2 13.Qd6xe5+ Kb2-c2 14.Qe5xb5 Rc4-h4 15.Qb5-e2+ Nb3-d2 16.a5-a6 Rh4-e4 17.Qe2-d1+ Kc2-d3 18.a6-a7 Re4-e8 19.Nc6-b4+ Kd3-e3
 27/53	00:14	 284,968k	19,681k	+16.42	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Bb8-d6 15.Qa2-d5 Bd6-a3 16.Qd5xe5+ Kc3-d2 17.Qe5-e1+ Kd2-d3 18.Qe1-d1+ Kd3-c3 19.Qd1-f3+ Kc3-d4 20.Qf3xa3 Kd4-e4 21.Rg1-d1 g6-g5 22.Ka8-b8 g2-g1Q 23.Rd1xg1 g5-g4 24.Rg1xh1 a7-a5 25.Rh1-g1
 28/46+	00:24	 494,121k	20,437k	+18.88	1.Qc3xc4
 28/51+	00:31	 655,026k	20,875k	+21.75	1.Qc3xc4
 28/56	00:39	 837,011k	21,129k	+22.66	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 Ka2-b2 12.b4xa5 g6-g5 13.a5-a6 e4-e3 14.Qd6-e5+ Kb2-c2 15.Qe5xe3 g5-g4 16.Kb6-b5 Nb3-d2 17.Kb5xa4 Nd2-f1 18.Qe3-d4
 29/61+	00:47	 1,025,411k	21,419k	+27.23	1.Qc3xc4
 29/61+	00:51	 1,107,207k	21,538k	+32.52	1.Qc3xc4
 29/61	00:51	 1,109,554k	21,540k	+30.49	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 Ka2-b2 12.b4xa5 Ra4-a1 13.Qd6-e5+ Kb2-a3 14.Rg1xa1+ Nb3xa1 15.Qe5xa1+ Ka3-b3 16.Qa1-b1+ Kb3-c3 17.a5-a6 g2-g1Q+ 18.Qb1xg1 g6-g5 19.Qg1xg5 e4-e3 20.Qg5xe3+ Kc3-c4 21.Qe3-d4+ Kc4-b3 22.Qd4xg7 Kb3-c4 23.Qg7-g4+ Kc4-d5 24.Qg4-g8+ Kd5-d6
 30/58+	00:53	 1,156,648k	21,574k	+40.46	1.Qc3xc4
 30/58	00:53	 1,162,735k	21,569k	+44.05	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 Ka2-b2 12.b4xa5 Ra4-a1 13.Qd6-e5+ Kb2-a3 14.Rg1xa1+ Nb3xa1 15.Qe5xa1+ Ka3-b3 16.Qa1-b1+ Kb3-c4 17.Qb1xe4+ Kc4-b3 18.Qe4-e3+ Kb3-b2 19.a5-a6 g2-g1Q 20.Qe3xg1 Bh1xc6 21.Kb6xc6 Kb2-c3 22.Qg1xg6 Kc3-d4 23.Qg6xg7+ Kd4-e4 24.Qg7-g4+ Ke4-d3 25.Qg4-f3+ Kd3-d2 26.Qf3-d5+ Kd2-c3
 31/47	00:54	 1,171,303k	21,550k	+59.08	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 Nb3-d4 13.Ka7xb6 g6-g5 14.Qd3-b1+ Ka2-a3 15.Qb1-c1+ Ka3-a2 16.Qc1-c5 b4-b3 17.Qc5-a5+ Ka2-b2 18.Qa5xe5 Kb2-c2 19.Qe5-e4+ Kc2-d2 20.Qe4xd4+ Kd2-e2 21.Rg1-d1
 32/39	00:54	 1,173,527k	21,542k	+59.65	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 b6-b5 13.Qd3xb5 Ka2-b2 14.Qb5xe5+ Kb2-c2 15.Ka7-b6 Nb3-d2 16.Qe5-c7+ Kc2-d3 17.Qc7-g3+ Kd3-c2 18.Qg3xg6+ Kc2-c3 19.Rg1-c1+ Kc3-d4 20.Qg6xg7+ Kd4-e4 21.Qg7-g4+ Ke4-e3
 33/41	00:54	 1,173,563k	21,542k	+59.65	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 b6-b5 13.Qd3xb5 Ka2-b2 14.Qb5xe5+ Kb2-c2 15.Ka7-b6 Nb3-d2 16.Qe5-c7+ Kc2-d3 17.Qc7-g3+ Kd3-c2 18.Qg3xg6+ Kc2-c3 19.Rg1-c1+ Kc3-d4 20.Qg6xg7+ Kd4-e4 21.Qg7-g4+ Ke4-e3
 34/43	00:54	 1,173,975k	21,540k	+59.65	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 b6-b5 13.Qd3xb5 Ka2-b2 14.Qb5xe5+ Kb2-c2 15.Ka7-b6 Nb3-d2 16.Qe5-c7+ Kc2-d3 17.Qc7-g3+ Kd3-c2 18.Qg3xg6+ Kc2-c3 19.Rg1-c1+ Kc3-d4 20.Qg6xg7+ Kd4-e4 21.Qg7-g4+ Ke4-e3 22.Qg4-g3+ Ke3-d4 23.Qg3-d6+ Kd4-e3
 35/45	00:54	 1,174,603k	21,538k	+59.65	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 b6-b5 13.Qd3xb5 Ka2-b2 14.Qb5xe5+ Kb2-c2 15.Ka7-b6 Nb3-d2 16.Qe5-c7+ Kc2-d3 17.Qc7-g3+ Kd3-c2 18.Qg3xg6+ Kc2-c3 19.Rg1-c1+ Kc3-d4 20.Qg6xg7+ Kd4-e4 21.Qg7-g4+ Ke4-e3 22.Qg4-g3+ Ke3-d4 23.Qg3-d6+ Kd4-e3
 36/47	00:54	 1,178,355k	21,526k	+59.65	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ra4xb4 9.Qd3xd6 a7-a5 10.Nc6xb4 a5xb4 11.Qd6-d3 Ka3-a2 12.Ka8-a7 b6-b5 13.Qd3xb5 Ka2-b2 14.Qb5xe5+ Kb2-c2 15.Ka7-b6 Nb3-d2 16.Qe5-c7+ Kc2-d3 17.Qc7-g3+ Kd3-c2 18.Qg3xg6+ Kc2-c3 19.Rg1-c1+ Kc3-d4 20.Qg6xg7+ Kd4-e4 21.Qg7-g4+ Ke4-e3 22.Qg4-g3+ Ke3-d4 23.Qg3-d6+ Kd4-e3 24.Rc1-e1+ Ke3-f3
 37/57	00:54	 1,182,607k	21,514k	+65.11	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 b6-b5 11.Ka7-b6 Ka2-b2 12.b4xa5 Ra4-a1 13.Qd6xe5+ Kb2-a3 14.Rg1xa1+ Nb3xa1 15.Qe5xa1+ Ka3-b3 16.Kb6xb5 g2-g1Q 17.Qa1xg1 Bh1xc6+ 18.Kb5xc6 Kb3-c3 19.Qg1-e3+ Kc3-b2 20.Qe3-d4+ Kb2-b1 21.Qd4-g1+ Kb1-c2 22.Qg1xg6+ Kc2-c3 23.a5-a6 Kc3-c4 24.Qg6-g4+ Kc4-c3 25.Qg4xg7+ Kc3-d3 26.Kc6-b6 Kd3-c2 27.Qg7-g2+ Kc2-d3
 38/55+	00:55	 1,186,397k	21,507k	+152.65	1.Qc3xc4
 38/57	00:55	 1,200,860k	21,480k	+M52	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 b6-b5 11.Ka7-b6 Ka2-b2 12.Qd6xe5+ Kb2-c2 13.Qe5-e2+ Kc2-c3 14.Qe2-e3+ Kc3-b2 15.b4xa5 Ra4-c4 16.Qe3-e5+ Kb2-c2 17.a5-a6 Rc4-h4 18.Qe5-e2+ Kc2-c3 19.Qe2-e3+ Kc3-c4 20.a6-a7 Rh4-h3 21.Qe3-e4+ Kc4-c3 22.Qe4-e5+ Kc3-c4 23.Qe5xb5+ Kc4-c3 24.Qb5-e5+ Kc3-c4 25.Qe5-e6+ Kc4-c3
 39/58	00:56	 1,205,933k	21,472k	+28.16	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 a5xb4 12.Nc6xb4+ Ka2-a3 13.Nb4-d5+ Ka3-b2 14.Qd6-c6 Ra4-d4 15.Qc6-c3+ Kb2-a2 16.Nd5-b4+ Rd4xb4+ 17.Qc3xb4 Ka2-b2 18.Qb4xe4 Kb2-c3 19.Qe4-f3+ Kc3-c2 20.Qf3-e2+ Kc2-c3 21.Rg1-d1 Kc3-b4 22.Qe2-b5+ Kb4-a3 23.Rd1-g1 g6-g5 24.Qb5-d3 Ka3-b4 25.Rg1-b1 g2-g1Q+ 26.Rb1xg1 Bh1-f3 27.Rg1xg5
 40/52+	00:56	 1,208,979k	21,466k	+M55	1.Qc3xc4
 40/57	01:00	 1,282,804k	21,349k	+M37	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Bb8-d6 15.Qa2-d5 Bd6-a3 16.Qd5xe5+ Kc3-b3 17.Qe5-e6+ Kb3-c2 18.Qe6-e2+ Kc2-c3 19.Qe2-e3+ Kc3-b4 20.Qe3-d2+ Kb4-b5 21.Qd2-d3+ Kb5-a4 22.Qd3-c2+ Ka4-a5 23.Qc2-b3 Ba3-c1 24.Qb3-c3+ Ka5-b5 25.Qc3xc1 g6-g5 26.Qc1-b2+ Kb5-c6 27.Qb2-c3+ Kc6-d5 28.Qc3-e3 g5-g4 29.Rg1-d1+ Kd5-c4
 41/59	01:00	 1,288,133k	21,342k	+M33	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Bb8-d6 15.Qa2-d5 Bd6-a3 16.Qd5xe5+ Kc3-c4 17.Qe5-e6+ Kc4-c3 18.Qe6-e3+ Kc3-b4 19.Qe3-d4+ Kb4-b5 20.Qd4-d3+ Kb5-a4 21.Qd3-c4+ Ka4-a5 22.Qc4-b3 Ba3-b4 23.Qb3-d5+ Ka5-b6 24.Qd5-b7+ Kb6-c5 25.Rg1-c1+ Bb4-c3 26.Rc1xc3+ Kc5-d4 27.Qb7-b4+ Kd4-d5 28.Qb4-c5+ Kd5-e6 29.Rc3-e3+ Ke6-f7 30.Qc5-d5+ Kf7-f6 31.Qd5-e5+ Kf6-f7
 42/63	01:03	 1,343,556k	21,295k	+M26	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 e5-e4 15.Ka8xb8 Kc3-d4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f6 21.Rd1-d6+ Kf6-f5 22.Rd6-d5+ Kf5-f6 23.Qe3-e5+ Kf6-f7 24.Rd5-d7+ Kf7-f8 25.Qe5xg7+ Kf8-e8 26.Qg7-e7+
 43/52	01:04	 1,367,882k	21,269k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 44/60	01:05	 1,385,044k	21,248k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 45/65	01:05	 1,397,604k	21,224k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 46/50	01:06	 1,415,361k	21,192k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 47/50	01:08	 1,448,063k	21,138k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 48/50	01:08	 1,449,904k	21,136k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 49/50	01:12	 1,517,810k	21,067k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 50/50	01:12	 1,523,018k	21,065k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 51/50	01:13	 1,540,564k	21,036k	+M25	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 e5-e4 16.Qa2-f2+ Kd4-e5 17.Qf2-g3+ Ke5-f5 18.Rg1-d1 e4-e3 19.Qg3-f3+ Kf5-e5 20.Qf3xe3+ Ke5-f5 21.Rd1-d5+ Kf5-f6 22.Qe3-e5+ Kf6-f7 23.Rd5-d7+ Kf7-f8 24.Qe5xg7+ Kf8-e8 25.Qg7-e7+
 52/50	01:17	 1,627,235k	20,931k	+M24	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d4 15.Ka8xb8 g6-g5 16.Rg1-d1+ Kd4-e3 17.Rd1-e1+ Ke3-f4 18.Qa2-f2+ Kf4-g4 19.Re1xe5 g2-g1Q 20.Qf2xg1+ Bh1-g2 21.Qg1-e3 Kg4-h4 22.Re5xg5 Bg2-f3 23.Qe3-f4+ Kh4-h3 24.Qf4-g3+
 53/48	01:17	 1,631,388k	20,928k	+M24	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Kb3-c2 10.b7-b8Q Bd6xb8 11.Qa6-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Kc3-d4 14.Qe2xd2+ Kd4-e4 15.Ka8xb8 Ke4-f5 16.Qd2-f2+ Kf5-e6 17.Qf2-e3 Ke6-f5 18.Rg1-e1 g2-g1Q 19.Qe3xe5+ Kf5-g4 20.Re1xg1+ Bh1-g2 21.Rg1xg2+ Kg4-f3 22.Rg2-g3+ Kf3-f2 23.Qe5-e3+ Kf2-f1 24.Rg3-g1+
 54/48	01:26	 1,823,271k	20,964k	+M24	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 Ka2-b2 12.Qd6-e5+ Kb2-c2 13.Qe5xe4+ Kc2-d2 14.Qe4-e1+ Kd2-c2 15.Qe1-e2+ Kc2-c3 16.Qe2-e3+ Kc3-b2 17.Qe3-d3 Nb3-c1 18.Qd3-d2+ Kb2-b3 19.Qd2-e3+ Kb3-a2 20.Qe3xc1 Ra4xb4+ 21.Nc6xb4+ Ka2-b3 22.Kb6xa5 g6-g5 23.Qc1-c2+ Kb3-a3 24.Rg1-a1+
 55/48	01:29	 1,876,807k	20,926k	+M24	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 Ka2-b2 12.Qd6-e5+ Kb2-c2 13.Qe5xe4+ Kc2-d2 14.Qe4-e1+ Kd2-c2 15.Qe1-e2+ Kc2-c3 16.Qe2-e3+ Kc3-b2 17.Qe3-d3 Nb3-c1 18.Qd3-d2+ Kb2-b3 19.Qd2-e3+ Kb3-a2 20.Qe3xc1 Ra4xb4+ 21.Nc6xb4+ Ka2-b3 22.Qc1-c2+ Kb3xb4 23.Rg1-b1+ Kb4-a3 24.Qc2-b3+
 56/48	01:30	 1,892,165k	20,909k	+M24	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Qb2xc3 6.Qc4xc3 Ra6-a4 7.Qc3-c2+ Ka2-a3 8.Qc2-d3 Ka3-a2 9.Qd3xd6 a7-a5 10.Ka8-a7 e5-e4 11.Ka7xb6 Ka2-b2 12.Qd6-e5+ Kb2-c2 13.Qe5xe4+ Kc2-d2 14.Qe4-e1+ Kd2-c2 15.Qe1-e2+ Kc2-c3 16.Qe2-e3+ Kc3-b2 17.Qe3-d3 Nb3-c1 18.Qd3-d2+ Kb2-b3 19.Qd2-e3+ Kb3-a2 20.Qe3xc1 Ra4xb4+ 21.Nc6xb4+ Ka2-b3 22.Qc1-c2+ Kb3xb4 23.Rg1-b1+ Kb4-a3 24.Qc2-b3+
 57/87	01:46	 2,228,951k	21,007k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 58/44	01:46	 2,239,370k	21,002k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 59/44	01:49	 2,287,124k	20,952k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 60/44	01:50	 2,320,933k	20,922k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 61/44	01:52	 2,343,380k	20,904k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 62/44	01:54	 2,386,500k	20,879k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 63/44	02:02	 2,533,995k	20,743k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 64/44	02:07	 2,634,405k	20,648k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 65/44	02:07	 2,639,751k	20,643k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 66/44	02:23	 2,945,460k	20,519k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 67/44	02:23	 2,945,878k	20,518k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 68/44	02:26	 2,993,475k	20,497k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 69/44	02:29	 3,051,581k	20,463k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 70/44	02:29	 3,065,289k	20,454k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 71/44	04:36	 5,425,184k	19,620k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 72/44	04:37	 5,446,276k	19,617k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 73/44	04:37	 5,446,330k	19,617k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 74/44	04:37	 5,446,373k	19,617k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 75/44	04:37	 5,446,410k	19,617k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 76/44	04:37	 5,446,453k	19,617k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 77/44	04:37	 5,446,503k	19,617k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 78/44	04:40	 5,494,863k	19,613k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 79/44	04:40	 5,494,974k	19,613k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 80/44	04:40	 5,495,908k	19,613k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 81/44	04:40	 5,496,442k	19,613k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 82/44	04:41	 5,518,774k	19,611k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 83/44	04:41	 5,525,721k	19,611k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 84/44	04:47	 5,640,690k	19,603k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 85/44	05:30	 6,475,828k	19,610k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 86/44	05:47	 6,804,158k	19,600k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 87/44	06:17	 7,408,624k	19,644k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 88/44	07:19	 8,664,793k	19,706k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 89/44	07:44	 9,151,660k	19,717k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 90/44	08:18	 9,867,387k	19,797k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 91/44	09:03	 10,870,002k	19,982k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 92/44	10:48	 13,118,029k	20,213k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 93/44	11:18	 13,700,707k	20,203k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 94/44	12:52	 15,687,840k	20,309k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 95/44	14:18	 17,511,644k	20,403k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
 96/44	14:38	 17,925,823k	20,404k	+M22	1.Qc3xc4 Qa3-b2 2.Ne2-c3+ Ka4-a3 3.Nc3xb5+ Ka3-a2 4.Bd1xb3+ Na1xb3 5.Nb5-c3+ Ka2-a3 6.Qc4xa6+ Nb3-a5 7.b4xa5 Qb2xc3 8.a5xb6+ Ka3-b3 9.b6-b7 Bd6-c7 10.Qa6-b5+ Kb3-c2 11.Qb5-e2+ Qc3-d2 12.Nc6-b4+ Kc2-c3 13.Nb4-a2+ Qd2xa2 14.Qe2xa2 Kc3-d3 15.Qa2-d5+ Kd3-e3 16.Qd5-c5+ Ke3-f4 17.Qc5xc7 g6-g5 18.b7-b8Q Kf4-f5 19.Qc7xe5+ Kf5-g4 20.Qe5-e4+ Kg4-h3 21.Qe4-f3+ Kh3-h4 22.Qb8-g3+
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towforce
Posts: 12708
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Location: Birmingham UK
Full name: Graham Laight

Re: Another chess problem cooked by engines

Post by towforce »

acase wrote: ↑Sat Jul 30, 2022 2:10 am This one isn't really a cook but Stockfish does find a much quicker alternate solution, a mate in 22.

[pgn][Date "1890"]
[White "Otto Blathy"]
[Black ""]
[Result "1-0"]
[SetUp "1"]
[FEN "K7/p5p1/rpNb2p1/1p2p3/kPp5/qrQ5/4N1p1/n2B2Rb w - - 0 1"]
[PlyCount "173"]
[EventDate "1890"]

1. Qd2 Bxb4 (1... Nc2 2. Qxc2 Qa1 3. Nc3+ Ka3 4. Nxb5+ Ka4 5. Qxc4 Qxd1 6. Rxd1 g1=Q 7. Rxg1 Bxc6+ 8. Qxc6) 2. Qc3 Ra5 3. Kb7 g5 4. Kc8 Ra6 5. Kd7 Ra5 6. Ke8 Ra6 7. Kf7 Ra5 8. Kg8 Ra6 9. Kh8 Ra5 10. Kh7 Ra6 11. Kg8 Ra5 12. Kf7 Ra6 13. Ke8 Ra5 14. Kd7 Ra6 15. Kc8 Ra5 16. Kb7 g4 17. Kc8 Ra6 18. Kd7 Ra5 19. Ke8 Ra6 20. Kf7 Ra5 21. Kg8 Ra6 22. Kh7 Ra5 23. Kh8 Ra6 24. Kg8 Ra5 25. Kf7 Ra6 26. Ke8 Ra5 27. Kd7 Ra6 28. Kc8 Ra5 29. Kb7 g3 30. Kc8 Ra6 31. Kd7 Ra5 32. Ke8 Ra6 33. Kf7 Ra5 34. Kg8 Ra6 35. Kh7 Ra5 36. Kh8 Ra6 37. Kg8 Ra5 38. Kf7 Ra6 39. Ke8 Ra5 40. Kd7 Ra6 41. Kc8 Ra5 42. Kb7 42... g5 $1 43. Kc8 Ra6 44. Kd7 Ra5 45. Ke8 Ra6 46. Kf7 Ra5 47. Kg8 Ra6 48. Kh8 Ra5 49. Kh7 Ra6 50. Kg8 Ra5 51. Kf7 Ra6 52. Ke8 Ra5 53. Kd7 Ra6 54. Kc8 Ra5 55. Kb7 g4 56. Kc8 Ra6 57. Kd7 Ra5 58. Ke8 Ra6 59. Kf7 Ra5 60. Kg8 Ra6 61. Kh8 Ra5 62. Kh7 Ra6 63. Kg8 Ra5 64. Kf7 Ra6 65. Ke8 Ra5 66. Kd7 Ra6 67. Kc8 Ra5 68. Kb7 e4 69. Kc8 Ra6 70. Kd7 Ra5 71. Ke6 Ra6 72. Kf5 Ra5 73. Kxe4 Ra6 74. Kf5 Ra5 75. Kg6 Ra6 76. Kh7 Ra5 77. Kh8 Ra6 78. Kg8 Ra5 79. Kf7 Ra6 80. Ke8 Ra5 81. Kd7 Ra6 82. Kc8 Ra5 83. Kb7 a6 84. Ka8 Nc2 85. Bxc2 Bf8 86. Qxa5+ bxa5 87. Nc3# 1-0[/pgn]

Are you saying that in 1890 Otto Blathy wrote a chess puzzle with an 87 move solution, or was this just an analysis?
Human chess is partly about tactics and strategy, but mostly about memory
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acase
Posts: 1002
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Another chess problem cooked by engines

Post by acase »

towforce wrote: ↑Sat Jul 30, 2022 10:38 am
acase wrote: ↑Sat Jul 30, 2022 2:10 am This one isn't really a cook but Stockfish does find a much quicker alternate solution, a mate in 22.

[pgn][Date "1890"]
[White "Otto Blathy"]
[Black ""]
[Result "1-0"]
[SetUp "1"]
[FEN "K7/p5p1/rpNb2p1/1p2p3/kPp5/qrQ5/4N1p1/n2B2Rb w - - 0 1"]
[PlyCount "173"]
[EventDate "1890"]

1. Qd2 Bxb4 (1... Nc2 2. Qxc2 Qa1 3. Nc3+ Ka3 4. Nxb5+ Ka4 5. Qxc4 Qxd1 6. Rxd1 g1=Q 7. Rxg1 Bxc6+ 8. Qxc6) 2. Qc3 Ra5 3. Kb7 g5 4. Kc8 Ra6 5. Kd7 Ra5 6. Ke8 Ra6 7. Kf7 Ra5 8. Kg8 Ra6 9. Kh8 Ra5 10. Kh7 Ra6 11. Kg8 Ra5 12. Kf7 Ra6 13. Ke8 Ra5 14. Kd7 Ra6 15. Kc8 Ra5 16. Kb7 g4 17. Kc8 Ra6 18. Kd7 Ra5 19. Ke8 Ra6 20. Kf7 Ra5 21. Kg8 Ra6 22. Kh7 Ra5 23. Kh8 Ra6 24. Kg8 Ra5 25. Kf7 Ra6 26. Ke8 Ra5 27. Kd7 Ra6 28. Kc8 Ra5 29. Kb7 g3 30. Kc8 Ra6 31. Kd7 Ra5 32. Ke8 Ra6 33. Kf7 Ra5 34. Kg8 Ra6 35. Kh7 Ra5 36. Kh8 Ra6 37. Kg8 Ra5 38. Kf7 Ra6 39. Ke8 Ra5 40. Kd7 Ra6 41. Kc8 Ra5 42. Kb7 42... g5 $1 43. Kc8 Ra6 44. Kd7 Ra5 45. Ke8 Ra6 46. Kf7 Ra5 47. Kg8 Ra6 48. Kh8 Ra5 49. Kh7 Ra6 50. Kg8 Ra5 51. Kf7 Ra6 52. Ke8 Ra5 53. Kd7 Ra6 54. Kc8 Ra5 55. Kb7 g4 56. Kc8 Ra6 57. Kd7 Ra5 58. Ke8 Ra6 59. Kf7 Ra5 60. Kg8 Ra6 61. Kh8 Ra5 62. Kh7 Ra6 63. Kg8 Ra5 64. Kf7 Ra6 65. Ke8 Ra5 66. Kd7 Ra6 67. Kc8 Ra5 68. Kb7 e4 69. Kc8 Ra6 70. Kd7 Ra5 71. Ke6 Ra6 72. Kf5 Ra5 73. Kxe4 Ra6 74. Kf5 Ra5 75. Kg6 Ra6 76. Kh7 Ra5 77. Kh8 Ra6 78. Kg8 Ra5 79. Kf7 Ra6 80. Ke8 Ra5 81. Kd7 Ra6 82. Kc8 Ra5 83. Kb7 a6 84. Ka8 Nc2 85. Bxc2 Bf8 86. Qxa5+ bxa5 87. Nc3# 1-0[/pgn]

Are you saying that in 1890 Otto Blathy wrote a chess puzzle with an 87 move solution, or was this just an analysis?
Otto Blathy created several puzzles with very lengthy solutions (30+ moves and several over 100 moves). His puzzles generally seem to consist of positions where the King or another piece of the side that LOSES (always black) has a very limited number of legal moves that consist of moving back and forth between a couple of squares in a locked up position while the side that WINS (always white) marches it's king or another piece all over the board before eventually forcing a Zugzwang.

Here is a rather humorous 100 move example:

[pgn][Date "1890"]
[White "Otto Blathy"]
[Black ""]
[Result "1-0"]
[SetUp "1"]
[FEN "1k6/1P3ppp/P1p5/1pP5/p1p3p1/2P1K1P1/1P3P1P/8 w - - 0 1"]
[PlyCount "199"]
[EventDate "1890"]

1. Kd2 Ka7 2. Kc1 Kb8 3. Kb1 Ka7 4. Ka1 $1 4... Kb8 5. Ka2 Ka7 6. Ka3 Kb8 7. Kb4 Ka7 8. Ka5 g6 9. Kb4 Kb8 10. Ka3 Ka7 11. Ka2 Kb8 12. Ka1 Ka7 13. Kb1 Kb8 14. Ka2 Ka7 15. Ka3 Kb8 16. Kb4 Ka7 17. Ka5 g5 18. Kb4 Kb8 19. Ka3 Ka7 20. Ka2 Kb8 21. Kb1 Ka7 22. Ka1 Kb8 23. Ka2 Ka7 24. Ka3 Kb8 25. Kb4 Ka7 26. Ka5 h6 27. Kb4 Kb8 28. Ka3 Ka7 29. Ka2 Kb8 30. Kb1 Ka7 31. Ka1 Kb8 32. Ka2 Ka7 33. Ka3 Kb8 34. Kb4 Ka7 35. Ka5 h5 36. Kb4 Kb8 37. Ka3 Ka7 38. Ka2 Kb8 39. Kb1 Ka7 40. Ka1 Kb8 41. Ka2 Ka7 42. Ka3 Kb8 43. Kb4 Ka7 44. Ka5 h4 45. Kb4 Kb8 46. Ka3 Ka7 47. Ka2 Kb8 48. Kb1 Ka7 49. Ka1 Kb8 50. Ka2 Ka7 51. Ka3 Kb8 52. Kb4 Ka7 53. Ka5 h3 54. Kb4 Kb8 55. Ka3 Ka7 56. Ka2 Kb8 57. Kb1 Ka7 58. Ka1 Kb8 59. Ka2 Ka7 60. Ka3 Kb8 61. Kb4 Ka7 62. Ka5 f6 63. Kb4 Kb8 64. Ka3 Ka7 65. Ka2 Kb8 66. Kb1 Ka7 67. Ka1 Kb8 68. Ka2 Ka7 69. Ka3 Kb8 70. Kb4 Ka7 71. Ka5 f5 72. Kb4 Kb8 73. Ka3 Ka7 74. Ka2 Kb8 75. Kb1 Ka7 76. Ka1 Kb8 77. Ka2 Ka7 78. Ka3 Kb8 79. Kb4 Ka7 80. Ka5 f4 81. Kb4 Kb8 82. Ka3 Ka7 83. Ka2 Kb8 84. Kb1 Ka7 85. Ka1 Kb8 86. Ka2 Ka7 87. Ka3 Kb8 88. Kb4 Ka7 89. Ka5 f3 90. Kb4 Kb8 91. Ka3 Ka7 92. Ka2 Kb8 93. Kb1 Ka7 94. Ka1 Kb8 95. Ka2 Ka7 96. Ka3 Kb8 97. Kb4 Ka7 98. Ka5 b4 99. Kxb4 a3 100. bxa3 1-0[/pgn]

I haven't checked it with an engine, but it looks like black can only move his king back and forth between the a7 and b8 squares keeping an eye on the white pawns on a6 and b7 before black eventually is forced to make some pawn moves on the king side and then on the queen side allowing the white king to pick off the rest of black's pawns or to queen one of white's pawns.
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acase
Posts: 1002
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Another chess problem cooked by engines

Post by acase »

Here is another cook from 2016 (white to play and draw) after white's 4th move in the main line the position is a tablebase win for black. Black wins with 4...Qb3+


[pgn][Event "1st comm, 2nd Ali Tebrizi Shatranji MT"]
[Site "?"]
[Date "2016.??.??"]
[Round "?"]
[White "Vladislav Tarasiuk (Ukraine)"]
[Black "?"]
[Result "1/2-1/2"]
[WhiteElo "2000"]
[TimeControl "300"]
[SetUp "1"]
[FEN "1K6/5q2/2P2p2/3n4/6p1/6P1/2Q5/k7 w - - 0 1"]
[Termination "normal"]
[PlyCount "21"]
[WhiteType "program"]
[BlackType "human"]

1. Qc1+ $1 {Thematic try:} (1. c7 $2 Qxc7+ $1 (1. .. Nxc7 $2 2. Qc1+ $1 Ka2
3. Qc2+ $1 Ka3 4. Qxc7 Qxc7+ 5. Kxc7 f5 6. Kd6 f4 7. gxf4 g3 8. f5 g2 9. f6
g1=Q 10. f7 Qa7 11. f8=Q $11) 2. Qxc7 Nxc7 3. Kxc7 f5 4. Kd6 f4 5. gxf4 g3
6. f5 g2 7. f6 g1=Q 8. f7 Qa7 $1 9. Ke6 Qa3 (9. .. Qc5 $19)) 1. .. Ka2 2.
Qc2+ $1 {Thematic try:} (2. c7 $2 Qxc7+ 3. Qxc7 Nxc7 4. Kxc7 f5 5. Kd6 f4
6. gxf4 g3 7. f5 g2 8. f6 g1=Q 9. f7 Qa7 $1 10. Ke6 Qa3 (10. .. Qc5 $19))
2. .. Ka3 3. c7 Nxc7 4. Qxc7 Qxc7+ 5. Kxc7 f5 6. Kd6 $1 f4 7. gxf4 g3 8. f5
g2 9. f6 g1=Q 10. f7 Qa7 $1 11. f8=Q $11 (11. Ke6 $2 Qc5 {$1 $19}) 1/2-1/2[/pgn]


here is the starting position:
[fen]1K6/5q2/2P2p2/3n4/6p1/6P1/2Q5/k7 w - - 0 1[/fen]

and here is the position after white's 4th move:

[fen]1K6/2Q2q2/5p2/8/6p1/k5P1/8/8 b - - 0 4[/fen]
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acase
Posts: 1002
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Another chess problem cooked by engines

Post by acase »

Here is another one from 2013, this is a white to play and win by Mikitovics however after white's 3rd move black's 3...Nf2! in the sub-variation holds on to the draw after 4.Ng3 Nh3+!


here is the pgn:

[pgn][Event "2.comm Aloni 75 JT (twin)"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Mikitovics, Janos"]
[Black "?"]
[Result "1-0"]
[BlackElo "2400"]
[WhiteElo "2000"]
[TimeControl "300"]
[SetUp "1"]
[FEN "8/8/8/4Kp2/8/BB1p4/4p2n/4k2N w - - 0 1"]
[Termination "normal"]
[PlyCount "29"]
[WhiteType "program"]
[BlackType "human"]

1. Kf4 $1 (1. Bb4+ $2 Kf1 $1 (1. .. d2 $2 2. Kf4) 2. Ng3+ Kf2 $11 (2. ..
Kg2 $2 3. Kf4 $1 Nf3 4. Bd5 $18)) 1. .. d2 (1. .. Kf1 2. Ng3+ Kf2 (2. ..
Kg2 3. Bd5+ $18) 3. Bc5+ $18) 2. Bb4 Ng4 3. Bc2 (3. Kxf5 $2 3. .. Nf2 $1 4.
Ng3 Nd3 $11) (3. Kf3 $2 3. .. Ne5+ 4. Kg2 Ng6 5. Bc2 Nf4+ 6. Kf3 Ng6 7. Ba4
Ne5+ 8. Kg2) (3. Ng3 $2 Kf2 $11) 3. .. Nf6 $1 (3. .. Nf2 4. Ng3 Ne4 5. Bxe4
fxe4 6. Ke3 $18 (6. Nxe4 $2 Kd1 $11)) 4. Kf3 Ng4 $1 (4. .. Ne4 5. Kg2 Nc3
6. Bxc3 $18 (6. Nf2 $2 d1=N {$1 $11})) 5. Ba4 $1 (5. Bb3 $2 Ne5+ 6. Kg2 Ng6
7. Bc2 Nf4+ 8. Kf3 Ng6 9. Ba4 Ne5+ 10. Kg2) 5. .. Ne5+ 6. Kg2 Nd3 (6. ..
Ng6 7. Bb5 f4 8. Kf3) 7. Ba5 $1 (7. Bc3 $2 Nb2 $3 (7. .. Nf4+ $2 8. Kf3 Ng6
9. Ba5 Ne5+ 10. Kg2 $18) (7. .. Nc5 $2 8. Bc2 $18) 8. Bb5 Kd1 (8. .. Nd1 $2
9. Ba5 $18) 9. Nf2+ Kc2 {$1 $11}) 7. .. Nf4+ (7. .. f4 8. Bb3 Nc1 9. Bc2
$18) 8. Kf3 Ne6 $1 (8. .. Nd3 9. Ke3 Kf1 10. Ng3+ $18) (8. .. Ng6 9. Bb5
$18) 9. Bb4 $1 (9. Bb5 $2 9. .. Nd4+ $11) (9. Ke3 $2 9. .. f4+ $11) (9. Kg2
$2 Nf4+ 10. Kf3 Ne6 11. Bb4) 9. .. f4 $1 (9. .. Nc5 10. Bb5 Ne6 11. Ke3 f4+
12. Ke4 $1 f3 13. Ke3 $3 (13. Kxf3 $2 Nd4+ $11)) 10. Kg2 $1 Ng5 11. Nf2 $1
(11. Bc2 $2 f3+ $11 (11. .. Ne6 $2 12. Bd3 $18)) 11. .. f3+ 12. Kg3 $1 (12.
Kg1 $2 Nh3+ 13. Nxh3 f2+ 14. Nxf2 {Stalemate}) 12. .. Kf1 (12. .. Ne6 13.
Ne4 $18 (13. Bb5 $2 13. .. Nd4 14. Bd3 Nc6 15. Bc3 Nd4 $1 16. Ba6 Nf5+ 17.
Kxf3 Nh4+ 18. Kg3 Nf5+ 19. Kg2 Nh4+ 20. Kg1 Nf3+ 21. Kg2 Nh4+ $11) (13. Bc3
$2 Nd4 14. Ne4 f2 15. Bxd2+ Kf1 16. Bb5 Kg1 {$1 $11})) 13. Bb5 $1 Ne4+ 14.
Kxf3 $1 (14. Nxe4 $2 d1=Q) 14. .. d1=Q 15. Nxd1 $18 1-0[/pgn]


and here is the position after white's 4th move in the sub variation:

[fen]8/8/8/5p2/1B3K2/6N1/2Bppn2/4k3 b - - 5 4[/fen]
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