The Halloween Puzzle 2022

Discussion of anything and everything relating to chess playing software and machines.

Moderator: Ras

Glarean
Posts: 262
Joined: Sun Oct 05, 2008 1:04 pm
Location: Switzerland
Full name: Walter Eigenmann

The Halloween Puzzle 2022

Post by Glarean »

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The Halloween haunting of the GLAREAN Witch knows no mercy this year. A new spawn of the diabolical chess witch’s kitchen leaves man and machine once again frozen in horror at so much diabolical wickedness on the board.

Image

The solution of this puzzle is pure witchcraft: With which infernal white move will the vile wench take down her opponent this time?

Download solution and analysis (EPD/PGN/CBV - zip):
https://glarean-magazin.ch/2022/10/31/d ... s-puzzles/

Happy Halloween: Walter

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[fen]2N3q1/pp1N4/5K2/7k/7P/3Q4/1P6/r7 w - - 0 1[/fen]


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Vinvin
Posts: 5309
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: The Halloween Puzzle 2022

Post by Vinvin »

21m59s for ShashChess25 (goldDigger personality) to get a high score : +4.90

Code: Select all

ShashChess25-x86-64-bmi2:
NNUE evaluation using nn-ad9b42354671.nnue enabled
 ...
 65/72	10:55	 12.961.436k	19.770k	 0,00	1.Nd6 Qd8+ 2.Ke6 Qg8+ 3.Ke5 Re1+ 4.Ne4 Kxh4 5.Ndf6 Qb8+ 6.Kd4 Qf4 7.Qc2 Qe3+ 8.Ke5 Kh3 9.b4 a6 10.Kf5 Rf1+ 11.Kg6 Rg1+ 12.Kf7 Rf1 13.Qc8+ Kh2 14.Ke7 Qf4 15.Qh8+ Kg2 16.Qg7+ Kh3 17.Qh7+ Kg2 18.Qg6+ Kh3 19.Qh5+ Kg2 20.Qd5 Re1 21.Kf7 Kh2 22.Ke6 Rc1 23.Qh5+ Kg1 24.Kd5 Re1 25.Qg6+ Kh1 26.Ng3+ Kh2 27.Qc2+ Kg1 28.Nge4 Qe3 29.Ke5 b6 30.Qc4 a5 31.b5 Qc5+ 32.Qxc5+ bxc5 33.Kd6 Rb1 34.Nc3 Rb3 35.Nfd5 Rxb5 36.Nxb5
 66/72	11:18	 13.431.843k	19.791k	 0,00	1.Nd6 Qd8+ 2.Ke6 Qg8+ 3.Ke5 Re1+ 4.Ne4 Kxh4 5.Ndf6 Qb8+ 6.Kd4 Qf4 7.Qc2 Qe3+ 8.Ke5 Kh3 9.b4 a6 10.Kf5 Rf1+ 11.Kg6 Rg1+ 12.Kf7 Rf1 13.Qc8+ Kh2 14.Ke7 Qf4 15.Qh8+ Kg2 16.Qg7+ Kh3 17.Qh7+ Kg2 18.Qg6+ Kh3 19.Qh5+ Kg2 20.Qd5 Re1 21.Kf7 Kh2 22.Ke6 Rc1 23.Qh5+ Kg1 24.Kd5 Re1 25.Qg6+ Kh1 26.Ng3+ Kh2 27.Qc2+ Kg1 28.Nge4 Qe3 29.Ke5 b6 30.Qc4 a5 31.b5 Qc5+ 32.Qxc5+ bxc5 33.Kd6 Rb1 34.Nc3 Rb3 35.Nfd5 Rxb5 36.Nxb5
 67/60+	16:29	 19.496.231k	19.702k	+0,03	1.Ne7
 67/60+	16:30	 19.509.406k	19.702k	+0,06	1.Ne7
 67/60+	21:59	 26.922.883k	20.405k	+4,90	1.Ne7
5 best moves after 1.Ne7 :

Code: Select all

 61/17	00:37	 1.262.798k	33.624k	+M8	1. ... Rd1 2.Qxd1+ Qg4 3.Qd5+ Kxh4 4.Nf5+ Qxf5+ 5.Qxf5 Kg3 6.Nc5 Kg2 7.Ne4 a6 8.Qf2+ Kh1 9.Ng3+
 61/25	00:37	 1.262.798k	33.624k	+M12	1. ... Qh8+ 2.Kf7 Kg4 3.Nf6+ Qxf6+ 4.Kxf6 Ra6+ 5.Ke5 Ra5+ 6.Nd5 b6 7.Ke4 Ra4+ 8.b4 Rxb4+ 9.Nxb4 Kh5 10.Kf5 Kh6 11.Qg3 Kh7 12.Kf6 Kh8 13.Qg7+
 61/31	00:37	 1.262.798k	33.624k	+M15	1. ... Qg2 2.Qf5+ Kh6 3.Qf4+ Kh5 4.Kf7 Ra6 5.Ne5 Rb6 6.Nf5 Rg6 7.Nxg6 Qxg6+ 8.Ke7 Qh7+ 9.Kf8 Qxf5+ 10.Qxf5+ Kxh4 11.Qf3 Kg5 12.Ke7 a6 13.Ke6 b5 14.Qg3+ Kh6 15.Kf6 a5 16.Qh2+
 61/39	00:37	 1.262.798k	33.624k	+M19	1. ... Qg1 2.Qh7+ Kg4 3.Ne5+ Kg3 4.Qd3+ Kf2 5.Nf5 Ra6+ 6.Kf7 Qf1 7.Qf3+ Kg1 8.Qg3+ Kh1 9.Nf3 Qc4+ 10.Kg7 Rg6+ 11.Kxg6 Qe6+ 12.Kg7 Qd7+ 13.Kf6 Qd8+ 14.Ne7 Qd6+ 15.Qxd6 Kg2 16.Qd3 Kf2 17.Nf5 b6 18.Qe3+ Kf1 19.Qd2 a5 20.Ne3+
 61/73	00:37	 1.262.798k	33.624k	+M51	1. ... Ra6+ 2.Qxa6 Qh8+ 3.Kf5 bxa6 4.Nf6+ Kh6 5.Neg8+ Kg7 6.h5 a5 7.h6+ Kf8 8.b3 Kf7 9.Ke5 Kg6 10.Kf4 a6 11.Kg4 Qxh6 12.Nxh6 Kxf6 13.Kf4 Ke6 14.Ke4 Kd6 15.Kd4 Kc6 16.Kc3 Kc5 17.Nf5 Kb5 18.Nd4+ Kc5 19.Ne2 Kb5 20.Kb2 Kb4 21.Nc1 a4 22.Na2+ Kb5 23.Nc3+ Kc5 24.Nxa4+ Kc6 25.Ka3 a5 26.Nc3 Kc7 27.Ka4 Kb6 28.Nb5 Kc5 29.Kxa5 Kd5 30.Nc3+ Ke5 31.Na2 Kd6 32.b4 Ke5 33.Ka6 Ke4 34.b5 Kd5 35.Nc3+ Kc5 36.Na4+ Kd5
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User avatar
Ajedrecista
Posts: 2164
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: The Halloween Puzzle 2022.

Post by Ajedrecista »

Hello:

I managed to find the problem with its proposed solution thanks to the great hint given by Walter in his web (V. Vinichenko, 1982).

Vincent's run of ShashChess after 1.- Ne7 found the proposed solution with 1.- ..., Ra6+ until 6.- h5, where ShashChess goes with 6.- ..., a5 and Vinichenko proposes 6.- ..., Kf8. A transposition arises early: 6th and 7th black moves played in reversed order. Then, both agree until 10.- Kf4, where ShashChess goes with 10.- ..., a6 and a later queen sac; and Vinichenko proposes 10.- ..., Kf7 without a later queen sac but aiming for a trapped queen in the corner with the amazing setup wNf6 + wNg8 + wPh6 + bQh8.

Analysing with SF 15 move by move, Vinichenko proposes 13.- ..., Kf7. SF 15 thought for a very long time that black could save the draw with 13.- ..., a4. Finally, SF 15 changed its mind at depth 51 with MultiPV = 7:

[d]6Nq/8/p4NkP/p7/5K2/1P6/8/8 b - - 3 13

Code: Select all

FEN: 6Nq/8/p4NkP/p7/5K2/1P6/8/8 b - - 3 13

Stockfish_15_x64_popcnt:
[...]
---------------------------------------------------------------------------
 10/10	00:00	      88.909	1.217.931	-152,59	Qh8xg8 Nf6xg8 Kg6h7 Kf4f5 Kh7xg8 Kf5e6 Kg8h7 Ke6d5 Kh7g6 Kd5c5
 10/10	00:00	      88.909	1.217.931	-152,59	Qh8h7 Nf6xh7 Kg6f7 Kf4e5 Kf7xg8 Nh7f6+ Kg8f7 h6h7 Kf7g7 Ke5f5
 10/11	00:00	      88.909	1.217.931	-152,59	Qh8xf6+ Ng8xf6 Kg6xf6 h6h7 Kf6f7 Kf4e4 Kf7f6 h7h8Q+ Kf6e6 Qh8e8+ Ke6d6
 10/11	00:00	      88.909	1.217.931	-152,56	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6f7 Kf4e5 Kf7g6 Ke5e4 Kg6g5 Nf5e7 Kg5f6
 10/13	00:00	      88.909	1.217.931	-152,55	Kg6f7 Kf4f5 a5a4 b3xa4 a6a5 Kf5e5 Kf7g6 Ke5f4 Kg6f7 Kf4f5 Kf7f8
 10/11	00:00	      88.909	1.217.931	-152,55	Qh8g7 h6xg7 Kg6xg7 Kf4f5 Kg7f7 Ng8h6+ Kf7g7 Kf5e5 a5a4 b3xa4
 10/13	00:00	      88.909	1.217.931	 0,00	a5a4 b3xa4 a6a5 Kf4e5 Kg6g5 Ke5e6 Kg5g6 Ke6d5 Kg6f5 Kd5d6 Kf5g6 Kd6e5
---------------------------------------------------------------------------
[...]
---------------------------------------------------------------------------
 50/43	09:56	1.215.539.982	2.036.319	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 a5a4 b3xa4 Kh6h5 Ne4c5 Kh5g4 Nc5xa6 Kg4f3 a4a5 Kf3e4 Na6c5+ Ke4e3 Ke6d5 Ke3f4 a5a6 Kf4g3 Nc5e4+ Kg3h4 a6a7 Kh4h3 a7a8Q Kh3g2 Qa8a2+ Kg2h1 Qa2b3 Kh1g1 Qb3g3+ Kg1f1 Qg3f2+
 50/45	09:56	1.215.539.982	2.036.319	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 b7b8Q Ke4d4 Na6c5 Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 50/45	09:56	1.215.539.982	2.036.319	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 b7b8Q Ke4d4 Na6c5 Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 50/53	09:56	1.215.539.982	2.036.319	-M27	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7a8 Nb4xa6 Ka8a7 Na6c5 Ka7a8 Kd6c6 Ka8b8 Kc6b6 Kb8c8 a5a6 Kc8b8 Nc5e6 Kb8c8 a6a7 Kc8d7 Ne6c5+ Kd7e8 a7a8Q+ Ke8f7 Kb6c6 Kf7f6 Kc6d5 Kf6f5 Nc5e4 Kf5f4 Qa8b8+ Kf4f3 Qb8g3+ Kf3e2 Qg3f2+ Ke2d1
 50/57	09:56	1.215.539.982	2.036.319	-152,61	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 h6h7 Kg6g7 h7h8Q+ Kg7xh8
 50/19	09:56	1.215.539.982	2.036.319	-152,58	Kg6f7 Kf4f5 a5a4 b3xa4 a6a5 Kf5e5 Kf7g6 Ke5f4 Kg6f7 Kf4f5 Kf7f8 Kf5e6 Qh8xf6+ Ke6xf6 Kf8xg8
 50/40	09:56	1.215.539.982	2.036.319	 0,00	a5a4 b3xa4 a6a5 Kf4e5 Kg6g5 Ke5e4 Kg5h4 Ke4f5 Kh4g3 h6h7 Kg3f2 Ng8h6 Kf2e2 Nh6f7 Qh8c8+ Kf5e5 Qc8c3+ Ke5e6 Qc3h3+ Ke6d6 Qh3g3+ Kd6d7 Qg3h3+ Kd7d8 Qh3d3+ Kd8e8 Qd3e3+ Ke8f8 Qe3c5+ Kf8g7 Qc5g1+ Kg7h6 Qg1h1+ Kh6g5 Qh1g1+ Kg5h5 Qg1h2+ Kh5g4 Qh2g1+
---------------------------------------------------------------------------
 51/43	20:16	3.823.773.963	3.143.785	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 a5a4 b3xa4 Kh6h5 Ne4c5 Kh5g4 Nc5xa6 Kg4f3 a4a5 Kf3e4 Na6c5+ Ke4e3 Ke6d5 Ke3f4 a5a6 Kf4g3 Nc5e4+ Kg3h4 a6a7 Kh4h3 a7a8Q Kh3g2 Qa8a2+ Kg2h1 Qa2b3 Kh1g1 Qb3g3+ Kg1f1 Qg3f2+
 51/45	20:16	3.823.773.963	3.143.785	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 b7b8Q Ke4d4 Na6c5 Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 51/45	20:16	3.823.773.963	3.143.785	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 b7b8Q Ke4d4 Na6c5 Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 51/47	20:16	3.823.773.963	3.143.785	-M23	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 Ke4d5 Kg6xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 Ka7b6 Ke6f6 Kb6c6 Kf6e5 b7b8Q+ Ke5e4 Qb8g3 Ke4d4 Qg3e1 Kd4d3 Kc6d5 Kd3c2 Kd5c4 Kc2b2 Qe1d2+ Kb2b1 Kc4c3 Kb1a1 Qd2b2+
 51/49	20:16	3.823.773.963	3.143.785	-M24	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7b8 Nb4xa6+ Kb8a7 Na6c7 Ka7b7 Kd6d7 Kb7a7 Kd7c6 Ka7b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
 51/49	20:16	3.823.773.963	3.143.785	-M24	Kg6f7 Kf4f5 a5a4 b3xa4 a6a5 Kf5e5 Kf7g6 Ke5d5 Kg6f5 Kd5c5 Kf5e5 Kc5c6 Qh8xh6 Ng8xh6 Ke5xf6 Kc6b6 Kf6e5 Kb6xa5 Ke5d6 Ka5b6 Kd6d7 Nh6f5 Kd7c8 a4a5 Kc8b8 a5a6 Kb8a8 Nf5d4 Ka8b8 Nd4e6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7xe6 Qa8f3 Ke6e5 Kb6c6 Ke5d4 Qf3e2 Kd4c3 Kc6c5 Kc3b3 Qe2d2 Kb3a3 Kc5c4 Ka3a4 Qd2a2+
 51/59	20:16	3.823.773.963	3.143.785	-M24	a5a4 b3xa4 Kg6f7 Kf4f5 a6a5 Kf5e5 Kf7g6 Ke5d5 Kg6f5 Kd5c5 Kf5e5 Kc5c6 Qh8xh6 Ng8xh6 Ke5xf6 Kc6b6 Kf6e5 Kb6xa5 Ke5d6 Ka5b6 Kd6d7 Nh6f5 Kd7e6 a4a5 Ke6xf5 Kb6c6 Kf5g4 Kc6c5 Kg4h5 a5a6 Kh5g6 a6a7 Kg6g5 Kc5d4 Kg5f6 a7a8Q Kf6f5 Qa8c6 Kf5f4 Qc6e4+ Kf4g3 Kd4e3 Kg3h2 Ke3f3 Kh2g1 Qe4c2 Kg1f1 Qc2f2+
---------------------------------------------------------------------------
 52/43	21:33	3.957.788.338	3.059.512	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 a5a4 b3xa4 Kh6h5 Ne4c5 Kh5g4 Nc5xa6 Kg4f3 a4a5 Kf3e4 Na6c5+ Ke4e3 Ke6d5 Ke3f4 a5a6 Kf4g3 Nc5e4+ Kg3h4 a6a7 Kh4h3 a7a8Q Kh3g2 Qa8a2+ Kg2h1 Qa2b3 Kh1g1 Qb3g3+ Kg1f1 Qg3f2+
 52/45	21:33	3.957.788.338	3.059.512	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 52/45	21:33	3.957.788.338	3.059.512	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 52/49	21:33	3.957.788.338	3.059.512	-M23	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 Ke4d5 Kg6xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 Ka7b6 Ke6f6 b7b8Q Kf6f5 Kb6c5 Kf5e4 Qb8g3 Ke4f5 Qg3f3+ Kf5e6 Qf3f4 Ke6e7 Kc5d5 Ke7d7 Qf4f7+ Kd7d8 Kd5c6 Kd8c8 Qf7f8+
 52/49	21:33	3.957.788.338	3.059.512	-M24	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7b8 Nb4xa6+ Kb8a7 Na6c7 Ka7b7 Kd6d7 Kb7a7 Kd7c6 Ka7b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
 52/51	21:33	3.957.788.338	3.059.512	-M24	Kg6f7 Kf4f5 a5a4 b3xa4 a6a5 Kf5e5 Kf7g6 Ke5d5 Kg6f5 Kd5c5 Kf5e5 Kc5c6 Qh8xh6 Ng8xh6 Ke5xf6 Kc6b6 Kf6e5 Kb6xa5 Ke5d6 Ka5b6 Kd6d7 Nh6f5 Kd7c8 a4a5 Kc8b8 a5a6 Kb8a8 Nf5d4 Ka8b8 Nd4e6 Kb8c8 a6a7 Kc8d7 Ne6d4 Kd7e7 Kb6c5 Ke7f6 a7a8Q Kf6f7 Kc5d5 Kf7e7 Nd4e6 Ke7f6 Qa8f8+ Kf6g6 Qf8g7+ Kg6f5 Qg7g5+
 52/49	21:33	3.957.788.338	3.059.512	-M24	a5a4 b3xa4 Kg6f7 Kf4f5 a6a5 Kf5e5 Kf7g6 Ke5d5 Kg6f5 Kd5c5 Kf5e5 Kc5c6 Qh8xh6 Ng8xh6 Ke5xf6 Kc6b6 Kf6e5 Kb6xa5 Ke5d6 Ka5b6 Kd6d7 Nh6f5 Kd7c8 a4a5 Kc8b8 a5a6 Kb8a8 Nf5d4 Ka8b8 Nd4e6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7xe6 Qa8f3 Ke6e5 Kb6c5 Ke5e6 Qf3f4 Ke6e7 Kc5d5 Ke7d7 Qf4f7+ Kd7d8 Kd5c6 Kd8c8 Qf7c7+
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 53/43	23:36	4.102.249.139	2.895.193	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 a5a4 b3xa4 Kh6h5 Ne4c5 Kh5g4 Nc5xa6 Kg4f3 a4a5 Kf3e4 Na6c5+ Ke4e3 Ke6d5 Ke3f4 a5a6 Kf4g3 Nc5e4+ Kg3h4 a6a7 Kh4h3 a7a8Q Kh3g2 Qa8a2+ Kg2h1 Qa2b3 Kh1g1 Qb3g3+ Kg1f1 Qg3f2+
 53/45	23:36	4.102.249.139	2.895.193	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 53/45	23:36	4.102.249.139	2.895.193	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 53/47	23:36	4.102.249.139	2.895.193	-M23	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 Ke4d5 Kg6xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Qb8e5 Kg4f3 Kc5d4 Kf3f2 Qe5e4 Kf2f1 Kd4e3 Kf1g1 Ke3f3 Kg1h2 Qe4c2+ Kh2h3 Qc2h7+
 53/49	23:36	4.102.249.139	2.895.193	-M24	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7b8 Nb4xa6+ Kb8a7 Na6c7 Ka7b7 Kd6d7 Kb7a7 Kd7c6 Ka7b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
 53/49	23:36	4.102.249.139	2.895.193	-M24	Kg6f7 Kf4f5 Qh8xg8 Nf6xg8 Kf7xg8 Kf5e6 Kg8h7 Ke6d5 Kh7xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 Ka7b6 Ke6f6 b7b8Q Kf6f5 Kb6c5 Kf5e4 Qb8g3 Ke4f5 Qg3f3+ Kf5e6 Qf3f4 Ke6e7 Kc5d5 Ke7d7 Qf4f7+ Kd7d8 Kd5c6 Kd8c8 Qf7f8+
 53/49	23:36	4.102.249.139	2.895.193	-M24	a5a4 b3xa4 Qh8xh6+ Ng8xh6 Kg6xf6 Kf4e4 Kf6e6 Nh6f5 a6a5 Nf5d4+ Ke6d6 Nd4b3 Kd6c6 Nb3xa5+ Kc6b6 Na5b3 Kb6c6 a4a5 Kc6c7 Ke4d5 Kc7b7 Nb3c5+ Kb7c7 a5a6 Kc7b6 Kd5c4 Kb6a7 Kc4b5 Ka7a8 Nc5e6 Ka8b8 Kb5c6 Kb8a8 Kc6b6 Ka8b8 Ne6c7 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
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 54/43	25:35	4.241.482.162	2.761.520	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 a5a4 b3xa4 Kh6h5 Ne4c5 Kh5g4 Nc5xa6 Kg4f3 a4a5 Kf3e4 Na6c5+ Ke4e3 Ke6d5 Ke3f4 a5a6 Kf4g3 Nc5e4+ Kg3h4 a6a7 Kh4h3 a7a8Q Kh3g2 Qa8a2+ Kg2h1 Qa2b3 Kh1g1 Qb3g3+ Kg1f1 Qg3f2+
 54/45	25:35	4.241.482.162	2.761.520	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 54/45	25:35	4.241.482.162	2.761.520	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 54/53	25:35	4.241.482.162	2.761.520	-M23	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 Ke4d5 Kg6xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Qb8e5 Kg4f3 Kc5d5 Kf3f2 Kd5e4 Kf2g2 Ke4e3 Kg2g1 Qe5g5+ Kg1h2 Ke3f3 Kh2h3 Qg5g3+
 54/49	25:35	4.241.482.162	2.761.520	-M24	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7b8 Nb4xa6+ Kb8a7 Na6c7 Ka7b7 Kd6d7 Kb7a7 Kd7c6 Ka7b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
 54/49	25:35	4.241.482.162	2.761.520	-M24	Kg6f7 Kf4f5 Qh8xg8 Nf6xg8 Kf7xg8 Kf5e6 Kg8h7 Ke6d5 Kh7xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Qb8e5 Kg4f3 Kc5d4 Kf3f2 Qe5e4 Kf2f1 Kd4e3 Kf1g1 Ke3f3 Kg1h2 Qe4c2+ Kh2h3 Qc2h7+
 54/49	25:35	4.241.482.162	2.761.520	-M24	a5a4 b3xa4 Qh8xh6+ Ng8xh6 Kg6xf6 Kf4e4 Kf6e6 Nh6f5 a6a5 Nf5d4+ Ke6d6 Nd4b3 Kd6c6 Nb3xa5+ Kc6b6 Na5b3 Kb6c6 a4a5 Kc6c7 Ke4d5 Kc7b7 Nb3c5+ Kb7c7 a5a6 Kc7b6 Kd5c4 Kb6a7 Kc4b5 Ka7a8 Nc5e6 Ka8b8 Kb5c6 Kb8a8 Kc6b6 Ka8b8 Ne6c7 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
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 55/43	26:39	4.304.482.292	2.691.914	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 a5a4 b3xa4 Kh6h5 Ne4c5 Kh5g4 Nc5xa6 Kg4f3 a4a5 Kf3e4 Na6c5+ Ke4e3 Ke6d5 Ke3f4 a5a6 Kf4g3 Nc5e4+ Kg3h4 a6a7 Kh4h3 a7a8Q Kh3g2 Qa8a2+ Kg2h1 Qa2b3 Kh1g1 Qb3g3+ Kg1f1 Qg3f2+
 55/45	26:39	4.304.482.292	2.691.914	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 55/45	26:39	4.304.482.292	2.691.914	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 55/47	26:39	4.304.482.292	2.691.914	-M23	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 Ke4d5 Kg6xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Qb8e5 Kg4f3 Kc5d5 Kf3f2 Kd5e4 Kf2g2 Ke4e3 Kg2g1 Qe5g5+ Kg1h2 Ke3f3 Kh2h3 Qg5g3+
 55/49	26:39	4.304.482.292	2.691.914	-M24	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7b8 Nb4xa6+ Kb8a7 Na6c7 Ka7b7 Kd6d7 Kb7a7 Kd7c6 Ka7b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
 55/49	26:39	4.304.482.292	2.691.914	-M24	Kg6f7 Kf4f5 Qh8xg8 Nf6xg8 Kf7xg8 Kf5e6 Kg8h7 Ke6d5 Kh7xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Qb8e5 Kg4f3 Kc5d5 Kf3f2 Kd5e4 Kf2g2 Ke4e3 Kg2g1 Qe5g5+ Kg1h2 Ke3f3 Kh2h3 Qg5g3+
 55/49	26:39	4.304.482.292	2.691.914	-M24	a5a4 b3xa4 Qh8xh6+ Ng8xh6 Kg6xf6 Kf4e4 Kf6e6 Nh6f5 a6a5 Nf5d4+ Ke6d6 Nd4b3 Kd6c6 Nb3xa5+ Kc6b6 Na5b3 Kb6c6 a4a5 Kc6c7 Ke4d5 Kc7b7 Nb3c5+ Kb7c7 a5a6 Kc7b6 Kd5c4 Kb6a7 Kc4b5 Ka7a8 Nc5e6 Ka8b8 Kb5c6 Kb8a8 Kc6b6 Ka8b8 a6a7+ Kb8c8 a7a8Q+ Kc8d7 Ne6d4 Kd7e7 Qa8f3 Ke7d6 Qf3e4 Kd6d7 Qe4e6+ Kd7d8 Nd4c6+
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 56/43	32:00	4.677.463.593	2.435.818	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 Kh6h5 Nc6xa5 Kh5g6 Ne4c5 Kg6g7 Nc5xa6 Kg7g6 Na6c5 Kg6g7 b3b4 Kg7g6 b4b5 Kg6g5 Ke6d5 Kg5f4 b5b6 Kf4g5 b6b7 Kg5g6 b7b8Q Kg6f7 Nc5e6 Kf7f6 Qb8f8+ Kf6g6 Qf8g7+ Kg6h5 Qg7g5+
 56/45	32:00	4.677.463.593	2.435.818	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 56/45	32:00	4.677.463.593	2.435.818	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 56/47	32:00	4.677.463.593	2.435.818	-M23	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 Ke4d5 Kg6xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Qb8e5 Kg4f3 Kc5d5 Kf3f2 Kd5e4 Kf2g2 Ke4e3 Kg2g1 Qe5g5+ Kg1h2 Ke3f3 Kh2h3 Qg5g3+
 56/49	32:00	4.677.463.593	2.435.818	-M24	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7b8 Nb4xa6+ Kb8a7 Na6c7 Ka7b7 Kd6d7 Kb7a7 Kd7c6 Ka7b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
 56/49	32:00	4.677.463.593	2.435.818	-M24	Kg6f7 Kf4f5 Qh8xg8 Nf6xg8 Kf7xg8 Kf5e6 Kg8h7 Ke6d5 Kh7xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Qb8e5 Kg4f3 Kc5d5 Kf3f2 Kd5e4 Kf2g2 Ke4e3 Kg2g1 Qe5g5+ Kg1h2 Ke3f3 Kh2h3 Qg5g3+
 56/49	32:00	4.677.463.593	2.435.818	-M24	a5a4 b3xa4 Qh8xh6+ Ng8xh6 Kg6xf6 Kf4e4 Kf6e6 Nh6f5 a6a5 Nf5d4+ Ke6d6 Nd4b3 Kd6c6 Nb3xa5+ Kc6b6 Na5b3 Kb6c6 a4a5 Kc6c7 Ke4d5 Kc7b7 Nb3c5+ Kb7c7 a5a6 Kc7b6 Kd5c4 Kb6a7 Kc4b5 Ka7a8 Nc5e6 Ka8b8 Kb5c6 Kb8a8 Kc6b6 Ka8b8 a6a7+ Kb8c8 a7a8Q+ Kc8d7 Ne6d4 Kd7e7 Qa8f3 Ke7d6 Qf3e4 Kd6d7 Qe4e6+ Kd7d8 Nd4c6+
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 57/43	33:01	4.742.116.776	2.393.726	-M21	Qh8g7 h6xg7 Kg6xg7 Kf4e5 Kg7f7 Ke5f5 Kf7g7 Ng8e7 Kg7f8 Kf5e6 Kf8g7 Nf6e4 Kg7h6 Ne7c6 Kh6g6 Nc6xa5 Kg6h7 Ne4c5 Kh7g6 Nc5xa6 Kg6h5 Na6c5 Kh5g5 b3b4 Kg5g6 b4b5 Kg6g5 Ke6d5 Kg5f4 b5b6 Kf4g5 b6b7 Kg5g6 b7b8Q Kg6f7 Nc5e6 Kf7f6 Qb8f8+ Kf6g6 Qf8g7+ Kg6h5 Qg7g5+
 57/45	33:01	4.742.116.776	2.393.726	-M22	Qh8h7 Nf6xh7 Kg6xh7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 57/45	33:01	4.742.116.776	2.393.726	-M22	Qh8xg8 Nf6xg8 Kg6h7 Ng8e7 Kh7xh6 Ne7c6 Kh6g6 Kf4e5 Kg6f7 Ke5d6 Kf7e8 Nc6xa5 Ke8d8 b3b4 Kd8c8 Kd6c6 Kc8d8 Na5b7+ Kd8e7 Nb7c5 Ke7f6 Nc5xa6 Kf6e7 b4b5 Ke7e6 b5b6 Ke6e5 b6b7 Ke5e4 Na6c5+ Ke4d4 b7b8Q Kd4e3 Kc6d5 Ke3d2 Nc5e4+ Kd2c2 Qb8b4 Kc2c1 Qb4d2+ Kc1b1 Ne4c3+ Kb1a1 Qd2a2+
 57/47	33:01	4.742.116.776	2.393.726	-M23	Qh8xf6+ Ng8xf6 Kg6xf6 Kf4e4 Kf6g6 Ke4d5 Kg6xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Kc5d5 Kg4f3 Qb8e5 Kf3f2 Kd5e4 Kf2g2 Ke4e3 Kg2g1 Qe5g5+ Kg1h2 Ke3f3 Kh2h3 Qg5g3+
 57/49	33:01	4.742.116.776	2.393.726	-M24	Qh8xh6+ Ng8xh6 Kg6xf6 Nh6f5 Kf6e6 Kf4e4 Ke6d7 Ke4d5 Kd7c7 Kd5c5 Kc7b7 Nf5d4 Kb7c7 Nd4c6 a5a4 b3xa4 Kc7b7 a4a5 Kb7c7 Nc6b4 Kc7b7 Kc5d6 Kb7b8 Nb4xa6+ Kb8a7 Na6c7 Ka7b7 Kd6d7 Kb7a7 Kd7c6 Ka7b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
 57/49	33:01	4.742.116.776	2.393.726	-M24	Kg6f7 Kf4f5 Qh8xg8 Nf6xg8 Kf7xg8 Kf5e6 Kg8h7 Ke6d5 Kh7xh6 Kd5c5 Kh6g6 Kc5b6 Kg6f6 Kb6xa5 Kf6e6 Ka5xa6 Ke6d7 b3b4 Kd7c7 b4b5 Kc7b8 Ka6b6 Kb8c8 Kb6a7 Kc8c7 b5b6+ Kc7d6 b6b7 Kd6e6 b7b8Q Ke6f5 Ka7b6 Kf5g5 Kb6c5 Kg5g4 Kc5d5 Kg4f3 Qb8e5 Kf3f2 Kd5e4 Kf2g2 Ke4e3 Kg2g1 Qe5g5+ Kg1h2 Ke3f3 Kh2h3 Qg5g3+
 57/49	33:01	4.742.116.776	2.393.726	-M24	a5a4 b3xa4 Qh8xh6+ Ng8xh6 Kg6xf6 Kf4e4 Kf6e6 Nh6f5 a6a5 Nf5d4+ Ke6d6 Nd4b3 Kd6c6 Nb3xa5+ Kc6c5 Na5b3+ Kc5d6 Ke4d4 Kd6c6 a4a5 Kc6b5 Kd4d5 Kb5a6 Kd5c6 Ka6a7 Nb3c5 Ka7b8 Nc5e6 Kb8a8 Ne6c7+ Ka8b8 a5a6 Kb8a7 Kc6c5 Ka7b8 Kc5b6 Kb8c8 a6a7 Kc8d7 a7a8Q Kd7e7 Qa8f3 Ke7d6 Qf3f6+ Kd6d7 Qf6f7+ Kd7d8 Qf7e8+
The problem seems indeed very difficult, so thank you Walter for post it at TalkChess.

V.I. Vinichenko won the Third Honourable Mention at Vecherny Novosibirsk 1982 with this problem.

Source: EG magazine, No. 80 (Vol. V), May 1985, page 446, problem No. 5568.
https://www.arves.org/arves/images/PDF/EG_PDF/eg80.pdf

Regards from Spain.

Ajedrecista.
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Jouni
Posts: 3762
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: The Halloween Puzzle 2022

Post by Jouni »

Yes difficult. But ShashChess 20.2 solves in 16m3s with 6 cores only:

Analysis by ShashChess 20.2:
...
1.Nd6 Qd8+ 2.Ke6 Qg8+ 3.Ke5 Re1+ 4.Ne4 Kxh4 5.Ndf6 Qb8+ 6.Kd4 Qf4 7.Qc2 Qe3+ 8.Ke5 Kh3 9.b4 Rc1 10.Qb2 Rg1 11.Kf5 Rf1+ 12.Kg6 Rg1+ 13.Kf7 Rf1 14.Qc2 Qd4 15.Qb3+ Kh2 16.Ke6 Qb6+ 17.Ke7 Qc7+ 18.Nd7 Qf4 19.Qa2+ Kh3 20.Qe2 Rg1 21.Qd3+ Kg2 22.Ndf6 Re1 23.Kf7 Rf1 24.Qd4 a5 25.b5 b6 26.Ke6 Qf5+ 27.Kd6 Qxb5 28.Qd2+ Kg1 29.Qe3+ Kg2 30.Nd5 Qe8
+/= (0.31) Depth: 56/62 00:14:35 5709mN, tb=25270603
1.Ne7
+/= (0.37 ++) Depth: 57/63 00:16:03 6287mN, tb=28888000
1.Ne7
+/= (0.43 ++) Depth: 57/63 00:16:04 6295mN, tb=28926243
1.Ne7
+/= (0.53 ++) Depth: 57/63 00:16:05 6301mN, tb=28950141
1.Ne7
+/= (0.68 ++) Depth: 57/63 00:16:06 6307mN, tb=28980044
1.Ne7
+/- (0.89 ++) Depth: 57/63 00:16:07 6314mN, tb=29005310
1.Ne7
+/- (1.17 ++) Depth: 57/63 00:16:08 6320mN, tb=29021358
1.Ne7
+/- (1.54 ++) Depth: 57/63 00:16:12 6347mN, tb=29235550
1.Ne7
+- (2.02 ++) Depth: 57/63 00:16:16 6370mN, tb=29464996
1.Ne7
+- (2.65 ++) Depth: 57/63 00:16:25 6433mN, tb=29845771
1.Ne7
+- (3.46 ++) Depth: 57/63 00:17:04 6719mN, tb=32125481
1.Ne7
+- (4.50 ++) Depth: 57/63 00:18:27 7410mN, tb=36337753
1.Ne7
+- (5.81 ++) Depth: 57/63 00:19:38 8039mN, tb=39141495
1.Ne7
+- (7.47 ++) Depth: 57/63 00:20:49 8666mN, tb=42213315
1.Ne7 Qg1 2.Qh7+ Kg4 3.Ne5+ Kg3 4.Qd3+ Kf2 5.Nf5 Qf1 6.Qd2+ Kg1 7.Ng4 Qf3 8.Qh2+ Kf1 9.Nge3+ Ke1 10.Qg1+ Ke2 11.Qxa1
+- (7.48) Depth: 57/67 00:21:07 8824mN, tb=42913554
Jouni
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