Another chess problem cooked by engines

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acase
Posts: 942
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Another chess problem cooked by engines

Post by acase »

This one is from the book "Brilliant chess studies 1837-1997" page 151.
It is supposed to be white to play and draw, but white clearly wins here.

The composer is given as N. Kralin and the key move is 1.g7 which indeed does draw, however it looks like 1.Ka2! wins

[fen]8/2p5/1Pp1n1P1/2P5/4B1P1/6r1/8/K2k4 w - - 0 1 [/fen]

Code: Select all

FEN: 8/2p5/1Pp1n1P1/2P5/4B1P1/6r1/8/K2k4 w - - 0 1

Stockfish_22070910_x64_bmi2:
NNUE evaluation using nn-3c0054ea9860.nnue enabled
 1/1	00:00	 366	366k	+1.93	1.b6-b7
 2/2	00:00	 651	651k	+3.76	1.b6-b7
 3/3	00:00	 8k	4,042k	+0.50	1.b6-b7 Rg3-b3 2.Be4-f5
 4/4	00:00	 9k	4,485k	+0.59	1.b6-b7 Rg3-b3 2.Be4-f5 Ne6xc5
 5/5	00:00	 14k	6,842k	+1.15	1.Be4-f5 c7xb6 2.Bf5xe6 Kd1-c1 3.c5xb6 Rg3-a3+ 4.Be6-a2
 6/6	00:00	 16k	8,012k	+1.53	1.g6-g7 Kd1-c1 2.Ka1-a2 Rg3xg4 3.b6-b7
 7/7	00:00	 17k	8,535k	+1.92	1.g6-g7 Kd1-c1 2.Ka1-a2 Rg3xg4 3.b6-b7 Rg4xe4 4.g7-g8Q
 8/8	00:00	 26k	8,529k	+1.81	1.g6-g7 Rg3-a3+ 2.Ka1-b2 Ra3-a8 3.Be4-f3+ Kd1-e1
 9/11	00:00	 83k	13,885k	+0.42	1.g6-g7 Rg3-a3+ 2.Ka1-b2 Ra3-a8 3.Be4xc6 Ra8-b8 4.Kb2-c3 Ne6xg7 5.b6xc7 Rb8-c8
 10/13	00:00	 141k	17,679k	+1.40	1.Ka1-a2 c7xb6 2.c5xb6 c6-c5 3.b6-b7
 11/11	00:00	 192k	19,175k	+2.28	1.Ka1-a2 Rg3-e3 2.b6-b7 Re3xe4 3.b7-b8Q Re4xg4
 12/14	00:00	 269k	20,672k	+2.20	1.Ka1-a2 c7xb6 2.c5xb6 Ne6-c5 3.g6-g7 Nc5xe4 4.g7-g8Q Ne4-c3+ 5.Ka2-a1 Kd1-c2 6.Qg8-h7+ Kc2-b3
 13/17	00:00	 436k	21,815k	+3.44	1.Ka1-a2 c7xb6 2.c5xb6 Rg3-e3 3.b6-b7 Re3-e2+ 4.Ka2-a1
 14/18	00:00	 777k	22,213k	+4.48	1.Ka1-a2 Rg3-e3 2.b6-b7 Re3-e2+ 3.Ka2-a3 Re2-e3+ 4.Ka3-b2 Re3xe4 5.b7-b8Q Re4-e2+ 6.Kb2-a1 Kd1-c2 7.Qb8-b2+ Kc2-d3 8.Qb2-f6
 15/24	00:00	 1,479k	20,836k	+4.69	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.g6-g7 Ne6xg7 5.b7-b8Q Rg4xe4 6.Qb8-b2+ Kd2-d3 7.Qb2xg7 Re4-b4 8.Qg7-g6+ Kd3-c3 9.Qg6-f6+ Kc3-d3 10.Qf6xc6
 16/28	00:00	 2,080k	20,394k	+4.59	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 Re4-e3 6.Qb8-d6+ Kd2-e2 7.Qd6-e7 c6-c5 8.g6-g7 Ne6xg7 9.Qe7xg7 Ke2-d3 10.Qg7-g6+ Kd3-d4 11.Qg6-d6+ Kd4-e4
 17/30	00:00	 3,394k	20,445k	+4.25	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d7 Re4-e3 8.g6-g7 Ne6xg7 9.Qd7xg7 Ke2-f3 10.Qg7-f7+ Kf3-e4 11.Qf7-e6+ Ke4-f4 12.Qe6-d5 c5-c4 13.Qd5-d4+ Kf4-f3
 18/34	00:00	 4,175k	20,569k	+4.37	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d7 Re4-e3 8.g6-g7 Ne6xg7 9.Qd7xg7 c5-c4 10.Qg7-g2+ Ke2-e1 11.Kb2-b1 Re3-c3 12.Qg2-e4+ Ke1-d1 13.Qe4-g4+ Kd1-e1 14.Qg4-d4 Rc3-d3 15.Qd4-f4 Ke1-e2
 19/34	00:00	 4,778k	20,593k	+4.21	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d7 Re4-e3 8.g6-g7 Ne6xg7 9.Qd7xg7 c5-c4 10.Kb2-c2 Ke2-f3 11.Qg7-f7+ Kf3-e4 12.Qf7xc4+ Ke4-f5 13.Kc2-d2 Re3-g3 14.Qc4-d5+ Kf5-f4 15.Qd5-d6+ Kf4-f3 16.Qd6-f6+ Kf3-e4
 20/32	00:00	 5,139k	20,639k	+4.21	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d7 Re4-e3 8.g6-g7 Ne6xg7 9.Qd7xg7 c5-c4 10.Kb2-c2 Ke2-f3 11.Qg7-f7+ Kf3-e4 12.Qf7xc4+ Ke4-f5 13.Kc2-d2 Re3-g3 14.Qc4-d5+ Kf5-f4 15.Qd5-d6+ Kf4-f3 16.Qd6-f6+ Kf3-e4
 21/41	00:00	 6,539k	21,093k	+4.16	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d7 Re4-e3 8.g6-g7 Ne6xg7 9.Qd7xg7 c5-c4 10.Kb2-c2 Ke2-f2 11.Qg7-f7+ Re3-f3 12.Qf7-c7 Rf3-e3 13.Qc7-f4+ Re3-f3 14.Qf4-h2+ Kf2-e3 15.Kc2-c3 Ke3-e4+ 16.Kc3xc4 Ke4-f5 17.Qh2-h5+ Kf5-e4 18.Qh5-e8+ Ke4-f5
 22/40	00:00	 8,017k	21,437k	+4.25	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d5 Ke2-e3 8.Qd5-d7 Ke3-f4 9.g6-g7 Ne6xg7 10.Qd7xg7 Re4-e3 11.Qg7-c7+ Kf4-e4 12.Kb2-c2 c5-c4 13.Qc7xc4+ Ke4-f5 14.Kc2-d2 Re3-e5 15.Qc4-c7 Kf5-f6 16.Kd2-d3 Re5-e6 17.Qc7-d8+ Kf6-f7 18.Kd3-d4
 23/37	00:00	 9,338k	21,516k	+4.29	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d5 Ke2-e3 8.Qd5-d7 Ke3-f4 9.g6-g7 Ne6xg7 10.Qd7-c7+ Re4-e5 11.Qc7xg7 Re5-e3 12.Kb2-c2 c5-c4 13.Qg7-f7+ Kf4-e5 14.Qf7xc4 Re3-f3 15.Kc2-d2 Ke5-f5 16.Kd2-e2 Rf3-g3 17.Qc4-f7+ Kf5-g5
 24/41	00:00	 11,196k	21,614k	+4.19	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d5 Ke2-e3 8.Qd5-d7 Ke3-f4 9.g6-g7 Ne6xg7 10.Qd7xg7 Re4-e3 11.Qg7-f7+ Kf4-e5 12.Kb2-c2 c5-c4 13.Qf7xc4 Ke5-f5 14.Kc2-d2 Re3-e6 15.Qc4-c8 Kf5-f6 16.Kd2-d3 Kf6-e5 17.Qc8-b8+ Ke5-d5
 25/38	00:00	 14,389k	22,070k	+4.20	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-g3 Re4-e3 8.Qg3-g2+ Ke2-e1 9.g6-g7 Ne6xg7 10.Qg2xg7 c5-c4 11.Kb2-c2 Re3-e2+ 12.Kc2-c3 Re2-e3+ 13.Kc3xc4 Ke1-f2 14.Qg7-g5 Re3-g3 15.Qg5-h4 Kf2-g2 16.Kc4-d4 Kg2-f3 17.Kd4-d3 Rg3-g4 18.Qh4-f6+ Kf3-g2 19.Kd3-e3
 26/39	00:00	 15,908k	22,156k	+4.21	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d5 Ke2-e3 8.Qd5-d7 Ke3-f4 9.g6-g7 Ne6xg7 10.Qd7xg7 Re4-e3 11.Qg7-c7+ Kf4-e4 12.Kb2-c2 c5-c4 13.Qc7xc4+ Ke4-f3 14.Kc2-d2 Re3-e5 15.Kd2-d3 Re5-e3+ 16.Kd3-c2 Kf3-g3 17.Qc4-c7+ Kg3-g4 18.Kc2-d2 Re3-f3 19.Kd2-e2
 27/40	00:00	 18,061k	22,188k	+4.22	1.Ka1-a2 c7xb6 2.c5xb6 Kd1-d2 3.b6-b7 Rg3xg4 4.b7-b8Q Rg4xe4 5.Ka2-b2 c6-c5 6.Qb8-d6+ Kd2-e2 7.Qd6-d5 Ke2-e3 8.Qd5-d7 Ke3-f4 9.g6-g7 Ne6xg7 10.Qd7xg7 Re4-e3 11.Qg7-c7+ Kf4-e4 12.Qc7-h7+ Ke4-e5 13.Qh7-e7+ Ke5-d4 14.Qe7-d7+ Kd4-e4 15.Kb2-c2 c5-c4 16.Qd7-g4+ Ke4-e5 17.Qg4xc4 Re3-f3 18.Kc2-d2 Ke5-f5 19.Kd2-e2 Rf3-f4 20.Qc4-g8
 28/46	00:02	 42,430k	20,943k	+7.11	1.Ka1-a2 Kd1-d2 2.b6-b7 Rg3xg4 3.b7-b8Q Rg4xe4 4.Qb8-b3 Ne6xc5 5.Qb3-b2+ Kd2-d3 6.g6-g7 Re4-e8 7.Qb2-f2 Nc5-e4 8.Qf2-f8 Re8xf8 9.g7xf8Q c6-c5 10.Qf8-g8 Kd3-d4 11.Ka2-b3 Ne4-d6 12.Qg8-g5 c5-c4+ 13.Kb3-b4 Nd6-e4 14.Qg5-g7+ Kd4-d3
 29/44+	00:03	 61,124k	20,294k	+7.49	1.Ka1-a2
 29/49+	00:04	 83,051k	20,080k	+8.08	1.Ka1-a2
 29/66+	00:05	 116,643k	19,817k	+8.83	1.Ka1-a2
 29/66	00:08	 159,137k	19,596k	+9.56	1.Ka1-a2 c7xb6 2.c5xb6 Ne6-c5 3.g6-g7 Nc5xe4 4.g7-g8Q Ne4-c3+ 5.Ka2-a1 Rg3-g1 6.Qg8-b3+ Kd1-d2+ 7.Ka1-b2 Rg1-b1+ 8.Kb2-a3 Rb1xb3+ 9.Ka3xb3 Nc3-e4 10.Kb3-a3 Ne4-d6 11.Ka3-b4 Kd2-e3 12.g4-g5 Nd6-f5 13.b6-b7 Ke3-f4 14.b7-b8Q+ Kf4xg5 15.Qb8-e5 Kg5-g4 16.Kb4-c4 Nf5-h4 17.Qe5-f6 Nh4-f5 18.Kc4-d3 Kg4-f4 19.Qf6-e6 c6-c5 20.Qe6-e4+ Kf4-g5 21.Qe4-e5 Kg5-g6
 30/49+	00:13	 260,602k	19,471k	+10.20	1.Ka1-a2
 30/63	00:19	 379,111k	19,559k	+10.89	1.Ka1-a2 c7xb6 2.c5xb6 Ne6-c5 3.g6-g7 Nc5xe4 4.g7-g8Q Ne4-c3+ 5.Ka2-a1 Rg3-g1 6.Qg8-b3+ Kd1-d2+ 7.Ka1-b2 Rg1-b1+ 8.Kb2-a3 Rb1xb3+ 9.Ka3xb3 Nc3-e4 10.Kb3-a3 Ne4-d6 11.Ka3-b4 Kd2-d3 12.Kb4-c5 Nd6-f7 13.b6-b7 Nf7-e5 14.g4-g5 Kd3-e4 15.Kc5-b4 c6-c5+ 16.Kb4-a4 Ne5-d7 17.g5-g6 c5-c4 18.g6-g7 Nd7-c5+ 19.Ka4-b4 Nc5xb7 20.g7-g8Q c4-c3 21.Qg8-e6+ Ke4-f4 22.Qe6-f6+ Kf4-e4 23.Kb4xc3 Nb7-a5 24.Kc3-b4 Ke4-d5 25.Kb4xa5 Kd5-c4
 31/55+	00:40	 787,025k	19,496k	+11.83	1.Ka1-a2
 31/55+	01:08	 1,349,885k	19,624k	+13.12	1.Ka1-a2
 31/55	01:40	 1,993,306k	19,747k	+14.22	1.Ka1-a2 Kd1-d2 2.Be4-f5 Ne6xc5 3.g6-g7 c7xb6 4.g7-g8Q Nc5-a4 5.Qg8-g5+ Rg3-e3 6.Qg5-f4 Na4-c3+ 7.Ka2-b2 Nc3-d5 8.Qf4-f2+ Re3-e2 9.Qf2-d4+ Kd2-e1+ 10.Kb2-c1 Re2-e3 11.g4-g5 b6-b5 12.g5-g6 Re3-c3+ 13.Qd4xc3+ Nd5xc3 14.g6-g7 Nc3-e2+ 15.Kc1-b2 Ke1-f2 16.g7-g8Q Ne2-f4 17.Qg8-g4 Nf4-g2 18.Bf5-d3 b5-b4 19.Bd3-e4 Ng2-e1 20.Kb2-b3 Kf2-e3 21.Kb3xb4 c6-c5+ 22.Kb4-c3
 32/60	03:07	 3,723,972k	19,912k	+15.54	1.Ka1-a2 Kd1-d2 2.Be4-f5 Ne6xc5 3.g6-g7 c7xb6 4.g7-g8Q Kd2-c3 5.Qg8-h8+ Kc3-b4 6.Qh8-d4+ Kb4-b5 7.Qd4-f2 Rg3-b3 8.g4-g5 Rb3-b4 9.g5-g6 Rb4-a4+ 10.Ka2-b2 Ra4-a7 11.Qf2-e2+ Kb5-a5 12.Qe2-e5 Ka5-a6 13.g6-g7 Ra7-a8 14.Qe5-f6 Ra8-e8 15.Qf6xc6 Re8-d8 16.Kb2-c2 Ka6-a5 17.Qc6-f6 Rd8-e8 18.Qf6-f7 Re8-e2+ 19.Kc2-d1 Re2-g2 20.g7-g8Q Rg2xg8 21.Qf7xg8 Nc5-a6 22.Qg8-a2+ Ka5-b5 23.Qa2-d5+ Kb5-b4 24.Qd5-d6+ Kb4-a5 25.Qd6-a3+ Ka5-b5 26.Bf5-d7+ Kb5-c4 27.Qa3xa6+ Kc4-d5 28.Qa6xb6
 33/51+	05:12	 6,224,351k	19,925k	+17.40	1.Ka1-a2
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User avatar
Ajedrecista
Posts: 1950
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: Another chess problem cooked by engines.

Post by Ajedrecista »

Hello Andrew:

Thanks for posting the problem. The author is confirmed by YACPDB (Yet Another Chess Problem Database):

https://yacpdb.org/#284782

With the given info of a specific issue of 1990, it could be lucky if you can get that original issue from a Google Sites web with links to many issues of this magazine in DJVU format:

https://sites.google.com/site/zurnalyss ... ozrenie-64

BE CAREFUL WITH THE LINKS! I can not guarantee if those links are clean or contain malware (yadi.sk host).

Regards from Spain.

Ajedrecista.
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Eelco de Groot
Posts: 4555
Joined: Sun Mar 12, 2006 2:40 am
Full name:   

Re: Another chess problem cooked by engines

Post by Eelco de Groot »

A slightly modified Rebel 14.1 agrees, Kb2 looks winning also, still nice testposition maybe, not a study perhaps


[fen]8/2p5/1Pp1n1P1/2P5/4B1P1/6r1/8/K2k4 w - -[/fen]

Code: Select all

Engine: Rebel 14.1 MOD-053E (512 MB)
gemaakt door Fabien Letouzey, Pawel Koziol, Chris Whittington en Ed Schröder

10/37  0:00   0.00     1.b7 Tb3 2.Lxc6 Kc1 3.Ld5 Tb1+ 4.Ka2 Pxc5 
                       5.Ka3 c6 6.g7 cxd5 7.g8D Tb3+ 8.Ka2 Tb2+ 
                       9.Ka3 Tb3+ (604.030) 

11/46  0:02   0.00     1.b7 Tb3 2.Lxc6 Kc1 3.Ka2 Pxc5 4.g7 Tb6 
                       5.Ka3 Tb3+ 6.Ka2 (1.319.909) 625 

12/46  0:02   0.00     1.b7 Tb3 2.Lxc6 Kc1 3.Ka2 Pxc5 4.g7 Tb6 
                       5.Ka3 Tb3+ 6.Ka2 (1.354.582) 620 

13/46  0:02   0.00     1.b7 Tb3 2.Lxc6 Kc1 3.Ka2 Pxc5 4.g7 Tb6 
                       5.Ka3 Tb3+ 6.Ka2 (1.393.991) 624 

13/46  0:04   +0.48    1.Kb2 Th3 2.Lxc6 cxb6 3.cxb6 Th8 
                       4.b7 Kd2 5.Ld5 Tb8 6.Lxe6 Txb7+ 
                       7.Lb3 Ke3 8.g5 Kf4 (3.252.035) 744 

14/46  0:04   +1.57    1.Kb2 cxb6 2.cxb6 Th3 3.Lxc6 Th8 
                       4.Ld5 Te8 5.b7 Pc7 6.Lf7 (3.789.979) 768 

15/46  0:05   +5.37    1.Kb2 cxb6 2.cxb6 Th3 3.Lf5 Te3 
                       4.Lxe6 Txe6 5.g7 Te8 6.Kb3 (4.140.256) 803 

16/46  0:05   +5.34    1.Kb2 cxb6 2.cxb6 Th3 3.Lf5 Pg7 4.b7 Th8 
                       5.Lc8 Th2+ 6.Kc3 Th3+ 7.Kb4 c5+ 
                       8.Kxc5 Tb3 (4.427.458) 807 

17/52  0:08   +5.57    1.Kb2 cxb6 2.cxb6 Pc5 3.g7 Tb3+ 
                       4.Ka2 Txb6 5.g8D Ta6+ 6.Kb2 Pxe4 
                       7.Db3+ Kd2 8.g5 Ta7 9.g6 Tg7 10.Dc4 Ke3 (9.005.927) 983 

18/58  0:10   +6.29    1.Kb2 cxb6 2.cxb6 Pc5 3.g7 Tb3+ 
                       4.Ka2 Txb6 5.g8D Ta6+ 6.Kb2 Pxe4 
                       7.Db3+ Kd2 8.g5 c5 9.Dc2+ Ke3 
                       10.Dc1+ Kd4 11.Dg1+ Ke5 12.g6 Tb6+ 
                       13.Kc1 Ta6 14.Dh2+ (10.517.108) 1031 

19/68  0:16   +6.40    1.Kb2 cxb6 2.cxb6 Pc5 3.g7 Tb3+ 
                       4.Ka2 Txb6 5.g8D Ta6+ 6.Kb2 Pxe4 
                       7.g5 Tb6+ 8.Ka3 Tb5 9.g6 Pd2 10.Ka4 Tg5 
                       11.g7 Pe4 12.Kb4 (18.099.628) 1122 

20/68  0:18   +6.15    1.Kb2 cxb6 2.cxb6 Pc5 3.g7 Tb3+ 
                       4.Ka2 Txb6 5.g8D Ta6+ 6.Kb2 Pxe4 
                       7.g5 Tb6+ 8.Ka3 Tb5 9.g6 Kd2 10.g7 Ta5+ 
                       11.Kb4 Tb5+ 12.Kc4 Pd6+ 13.Kd4 Pf5+ 
                       14.Ke4 (21.041.409) 1126 

21/68  0:24   +6.70    1.Kb2 cxb6 2.cxb6 Ke2 3.b7 Txg4 
                       4.b8D Txe4 5.Dh2+ Kf3 6.Dh1+ Ke3 
                       7.g7 Pxg7 8.Dh6+ Kd3 9.Dxg7 Tb4+ 
                       10.Ka3 c5 11.Df8 Tc4 12.Ka2 (27.446.663) 1105 

22/68  0:42   +6.40    1.Kb2 cxb6 2.cxb6 Pc5 3.g7 Tb3+ 
                       4.Ka2 Txb6 5.g8D Ta6+ 6.Kb2 Pxe4 
                       7.g5 Ta5 8.g6 Tb5+ 9.Ka3 Pc3 10.Dc4 Kd2 
                       11.Df4+ Kd3 12.Dd6+ Kc2 13.Dh2+ Kc1 
                       14.Dh6+ (49.055.480) 1160 

23/70  1:15   +6.90    1.Kb2 cxb6 2.cxb6 Pc5 3.g7 Tb3+ 
                       4.Ka2 Txb6 5.g8D Ta6+ 6.Kb2 Pxe4 
                       7.g5 Ta5 8.g6 Tb5+ 9.Ka3 Pc3 10.Dc4 Kd2 
                       11.g7 Pb1+ 12.Ka4 Pc3+ 13.Dxc3+ Kxc3 
                       14.g8D (90.935.145) 1203 

24/70  1:20   +6.90    1.Kb2 cxb6 2.cxb6 Pc5 3.g7 Tb3+ 
                       4.Ka2 Txb6 5.g8D Ta6+ 6.Kb2 Pxe4 
                       7.g5 Ta5 8.g6 Tb5+ 9.Ka3 Pc3 10.Dc4 Kd2 
                       11.g7 Pb1+ 12.Ka4 Pc3+ 13.Dxc3+ Kxc3 
                       14.g8D (95.896.089) 1192 

25/70  1:57   +7.03    1.Kb2 cxb6 2.cxb6 Ke2 3.b7 Txg4 
                       4.b8D Txe4 5.Dh2+ Kf3 6.Dh3+ Kf4 
                       7.g7 Pxg7 8.Dh6+ Ke5 9.Dxg7+ Kd5 
                       10.Kc3 c5 11.Dd7+ Ke5 12.De8+ Kd5 
                       13.Da8+ Ke5 14.Db8+ (136.866.985) 1165 

25/70  4:48   +8.15    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke1 6.Dxc6 Te2+ 
                       7.Kb1 Te3 8.Dg2 Te2 9.Dg1+ Kd2 10.g7 Pxg7 
                       11.Dxg7 Te4 (383.466.134) 1328 

26/70  5:56   +8.62    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke3 6.Dxc6 Kf4 
                       7.g7 Te2+ 8.Ka3 Pxg7 9.Dh6+ Kf3 
                       10.Dxg7 Td2 11.Kb3 Tg2 12.Df6+ Ke2 
                       13.Dd8 (477.069.031) 1339 

27/70  6:49   +8.63    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke3 6.Dxc6 Te5 
                       7.g7 Pxg7 8.Dh6+ Kd3 9.Dxg7 Te3 
                       10.Dg5 Ke4 11.Kb2 Kf3 12.Dh4 (545.580.856) 1331 

28/72  16:50  +8.62    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke1 6.Dxc6 Te3 
                       7.Kb1 Kf2 8.Dc2+ Te2 9.Df5+ Ke1 
                       10.Df6 Kd2 11.g7 Pxg7 12.Db2+ Ke3 
                       13.Dxg7 Kf3 14.Dh8 (1.950.708.956) 1931 

29/72  20:09  +8.64    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke1 6.Dxc6 Te3 
                       7.Dh1+ Kf2 8.Dh4+ Kf3 9.g7 Pxg7 
                       10.Df6+ Kg2 11.Dxg7+ Tg3 12.Db2+ Kg1 
                       13.De5 Kf2 14.Dc5+ (2.248.812.483) 1859 

30/72  26:56  +8.64    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke1 6.Dxc6 Te3 
                       7.Dh1+ Kf2 8.Dh4+ Kf3 9.g7 Pxg7 
                       10.Df6+ Kg2 11.Dxg7+ Tg3 12.De5 Tf3 
                       13.Kb2 Kf1 14.Db5+ (2.796.971.950) 1730 

31/76  42:23  +8.64    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke1 6.Dxc6 Te3 
                       7.Dh1+ Kf2 8.Dh4+ Kf3 9.g7 Pxg7 
                       10.Df6+ Kg2 11.Dxg7+ Tg3 12.De5 Tf3 
                       13.Kb2 Kf1 14.Db5+ (4.224.376.050) 1660 

32/80  61:53  +8.65    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke1 6.Dxc6 Te3 
                       7.Dh1+ Kf2 8.Dh4+ Kf3 9.Df6+ Kg2 
                       10.g7 Pxg7 11.Dxg7+ Tg3 12.De5 Tf3 
                       13.Kb2 Kf1 14.Kc2 (6.191.278.894) 1667 

33/88  232:27 +8.66    1.Ka2 cxb6 2.cxb6 Kd2 3.b7 Txg4 
                       4.b8D Txe4 5.Dd6+ Ke1 6.Dxc6 Te3 
                       7.Dh1+ Kf2 8.Dh2+ Kf1 9.g7 Pxg7 
                       10.Df4+ Ke2 11.Dg4+ Kf1 12.Dxg7 Tf3 
                       13.De5 Kf2 14.Kb2 (34.691.949.671) 2487

If I look at the endposition with Shredderbases this would perhaps still be a win for White. Rebel has no EGTBs of course:

[fen]8/2p5/1Pp1n1P1/2P5/4B1Pp/6r1/8/K2k4 w - -[/fen]
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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acase
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Full name: Andrew R Case

Re: Another chess problem cooked by engines

Post by acase »

Here is another cook (I think) from the same book "Brilliant chess studies 1837-1997" by the great Alexey Troitzky. 1.g6 is the key move here.

This is a white to play and win, however the engines seem to think this is a draw:

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


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.

Here is a link to the study: https://yacpdb.org/#280606 (thanks to Ajedrecista for pointing out this useful resource to me)
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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 looks like a cook also.

White to play and win By composer N. Kralin (again):

[fen]2k2N2/8/2Pb4/5b2/5N1p/1K1P4/5B2/8 w - - 4 1[/fen]


look here to see the solution----->https://yacpdb.org/#284786

on the 6th move for black the solution plays 6...Bg3? which indeed loses, however it looks like 6...Bf4! holds (a tablebase draw)
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acase
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Re: Another chess problem cooked by engines

Post by acase »

Another cook I believe, white to play and win, composer is J. Dorogov:

[fen]8/8/1p2PQ2/k1pN4/p7/2PK2pq/PP2P1np/8 w - - 1 1[/fen]

1.e7 Nf4 2.Qf4 Qh7?? loses (2...g2+! seems to hold here or at least put up a much better fight)

look here---->https://yacpdb.org/#284259
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acase
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Re: Another chess problem cooked by engines

Post by acase »

Here is another cook, composer is Kuznetsov, unfortunately I don't have a link for this one, it's from the book mentioned in the op, it's white to play and draw.

[fen]6B1/b4pB1/1n4P1/3b3P/7K/8/pP6/7k w - - 1 1[/fen]



[pgn][Event "Computer chess game"]
[Site "WORKSTATION-PC"]
[Date "2022.07.17"]
[Round "?"]
[White "Workstation"]
[Black "Workstation"]
[Result "*"]
[BlackElo "2400"]
[Time "20:45:46"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "6B1/b4pB1/1n4P1/3b3P/7K/8/pP6/7k w - - 1 1"]
[Termination "unterminated"]
[PlyCount "8"]
[WhiteType "human"]
[BlackType "human"]

1. b3 f6 2. Bxf6 Bxg8 3. h6 Nd7 4. h7 Bf2+? {this loses} (4. .. Bxh7! {And
mates in 31}) *
[/pgn]
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towforce
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Location: Birmingham UK

Re: Another chess problem cooked by engines

Post by towforce »

Roughly what proportion of puzzles from the pre-computer age either have an alternative solution or are wrong?

My guess would be about 1%.
Writing is the antidote to confusion.
It's not "how smart you are", it's "how are you smart".
Your brain doesn't work the way you want, so train it!
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Ajedrecista
Posts: 1950
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Location: Madrid, Spain.

Re: Another chess problem cooked by engines.

Post by Ajedrecista »

Hello Andrew:
acase wrote: ↑Mon Jul 18, 2022 3:08 am Here is another cook, composer is Kuznetsov, unfortunately I don't have a link for this one, it's from the book mentioned in the op, it's white to play and draw.

[fen]6B1/b4pB1/1n4P1/3b3P/7K/8/pP6/7k w - - 1 1[/fen]



[pgn][Event "Computer chess game"]
[Site "WORKSTATION-PC"]
[Date "2022.07.17"]
[Round "?"]
[White "Workstation"]
[Black "Workstation"]
[Result "*"]
[BlackElo "2400"]
[Time "20:45:46"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "6B1/b4pB1/1n4P1/3b3P/7K/8/pP6/7k w - - 1 1"]
[Termination "unterminated"]
[PlyCount "8"]
[WhiteType "human"]
[BlackType "human"]

1. b3 f6 2. Bxf6 Bxg8 3. h6 Nd7 4. h7 Bf2+? {this loses} (4. .. Bxh7! {And
mates in 31}) *
[/pgn]
I see that this is the problem Nº 150 of the book. A search in PDB Die Schwalbe database is enough to find the problem:

https://pdb.dieschwalbe.de/

Code: Select all

A='KUZNETSOV' AND WPIECES=6 AND BPIECES=6
The problem was published at an issue of '64' chess magazine of year 1998 according to PDB Die Schwalbe database. The database contains the following comment: Correction of an earlier joint work with B. A. Sakharov in Shakhmatnaya Moskva 1969. I did not found neither the issue, nor the problem alone.

Regards from Spain.

Ajedrecista.
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acase
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Joined: Wed Mar 15, 2006 1:14 am
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Re: Another chess problem cooked by engines

Post by acase »

towforce wrote: ↑Tue Jul 19, 2022 5:55 pm Roughly what proportion of puzzles from the pre-computer age either have an alternative solution or are wrong?

My guess would be about 1%.
I would probably say a little more than that. Exactly how much more I don't know, but I was thinking around 3-5%.


Here is another one, white to play and draw:

[pgn][Event "1.p Problem-Forum"]
[Site "?"]
[Date "2011"]
[Round "?"]
[White "Wiland Bruch and Martin Minski"]
[Black "?"]
[Result "1/2-1/2"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "n1b5/5P1n/1pr5/1pk1P3/1Rp1P1KP/2P4P/8/5Qbr w - - 0 1"]
[Termination "normal"]
[PlyCount "8"]
[WhiteType "human"]
[BlackType "human"]

1. Kh5 $1 Nf8 (1. .. Rh6+ {<main>} 2. Kxh6 Be3+ 3. Qf4 $1 (3. Kxh7 $2 Rxf1)
3. .. Bxf4+ 4. Kxh7 Bh6 $1 5. Kxh6 Rf1 6. Kg7 Nc7 $1 7. f8=Q+ (7. Rb1 $2
Ne6+ 8. Kg8 Rxb1) 7. .. Rxf8 8. Kxf8 Bxh3 $1 9. h5 Bg2 $1 10. h6 Bxe4
{<eg>} 11. Rb2 Kd5 12. Kf7 Bf5 13. Kf6 Bd3 14. Rh2 Kc5 $1 15. h7 (15. e6 b4
16. cxb4+ Kxb4 17. h7 Bxh7 18. Rxh7 Nxe6 19. Kxe6) 15. .. Nd5+ 16. Kf7 Bxh7
17. Rxh7 b4 $1 18. cxb4+ Kxb4 19. Ke6) (1. .. Rc7 2. Qd1 Rd7 3. Qf3) 2. Qc1
$1 (2. Qf4 $2 Re6 $1 (2. .. Rxh3 $2 3. Qg5 $1 Rxc3 4. Qe7+ Kd4 5. Qxf8 Rg3
6. Qd8+ Kxe4 7. Qd1)) 2. .. Re6 (2. .. Be6 {<main>} 3. Qe3+ $1 (3. Qxg1+ $2
Rxg1 4. Rxb5+ Kxb5) 3. .. Bxe3 4. Rxb5+ $1 (4. Rxc4+ $2 Bxc4 $1) 4. .. Kxb5
{Stalemate}) (2. .. Nc7 3. Qg5 Rg6 4. Qe7+ Kc6 5. Qxf8) (2. .. Bxh3 3. Qd2
$1 (3. Rb1 $2 b4 $1 4. Qg5 Kb5 5. e6+ Rc5 6. e7 Rxg5+ 7. Kxg5 Nc7 8. e8=Q+
Bd7 $1) 3. .. Bg4+ (3. .. Be6 4. Qe3+ $1 Bxe3 5. Rxb5+ Kxb5 {Stalemate}) 4.
Kxg4 Rg6+ 5. Kf5) 3. Qxg1+ $1 (3. Qa3 $2 3. .. Rxe5+) (3. Qe3+ $2 Bxe3 4.
Rxc4+ Kxc4) 3. .. Rxg1 (3. .. Kc6 4. Qxh1) 4. Rxc4+ $1 (4. Rxb5+ $2 Kc6 5.
Rc5+ Kd7 $1 (5. .. Kb7 $2 6. Rc7+ Ka6 7. Ra7+) 6. Rc7+ Kd8 7. Rxc8+ Ke7) 4.
.. Kxc4 {Stalemate} 1/2-1/2[/pgn]


Stockfish believes that Black wins this one (with some forward-backwards analysis}:

Code: Select all

FEN: n1b5/5P1n/1pr5/1pk1P3/1Rp1P1KP/2P4P/8/5Qbr w - - 0 1

Stockfish_22070910_x64_bmi2:
NNUE evaluation using nn-3c0054ea9860.nnue enabled
 1/1	00:00	 526	263k	-1.96	1.Kg4-f3
 2/2	00:00	 1k	584k	-2.61	1.Kg4-f3 Nh7-f8
 3/3	00:00	 2k	760k	-4.97	1.Kg4-f3 Bc8-e6
 4/3	00:00	 2k	848k	-4.54	1.Kg4-f3 Na8-c7
 5/7	00:00	 5k	2,670k	-6.72	1.Kg4-h5 Nh7-f8 2.Rb4-b1 Bg1-e3
 6/7	00:00	 15k	4,864k	-5.72	1.Kg4-f3 Rh1xh3+ 2.Kf3-e2 Bc8-g4+ 3.Ke2-d2
 7/11	00:00	 39k	7,894k	-6.63	1.Kg4-h5 Nh7-f8 2.Qf1-b1 Rc6-e6 3.Rb4xb5+ Kc5-c6 4.Qb1-b4 Na8-c7
 8/15	00:00	 138k	11,517k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-b1 Rc6-e6 3.Rb4xb5+ Kc5-c6 4.Qb1-b4 Na8-c7 5.Qb4xf8 Bc8-d7 6.Rb5-d5 Bg1-c5 7.Qf8-d8 Bd7-e8 8.f7xe8B+ Re6xe8
 9/17	00:00	 162k	12,467k	-6.63	1.Kg4-h5 Nh7-f8 2.Qf1-b1 Rc6-h6+ 3.Kh5xh6 Bg1-e3+ 4.Kh6-g7 Rh1xb1 5.Rb4xb1 Nf8-e6+ 6.Kg7-h7 Na8-c7 7.h4-h5 Be3-d2 8.Rb1-d1 Bd2xc3
 10/23	00:00	 254k	13,364k	-6.72	1.Kg4-h5 Nh7-f8 2.Qf1-b1 Rc6-h6+ 3.Kh5xh6 Bg1-e3+ 4.Kh6-g7 Rh1xb1 5.Rb4xb1 Nf8-e6+ 6.Kg7-g8 Na8-c7 7.h4-h5 Be3-d2 8.Rb1-g1 Bd2xc3 9.h5-h6 Bc3xe5 10.f7-f8Q+ Ne6xf8
 11/25	00:00	 421k	14,534k	-6.43	1.Kg4-h5 Nh7-f8 2.Qf1-b1 Rc6-h6+ 3.Kh5xh6 Bg1-e3+ 4.Kh6-g7 Nf8-e6+ 5.Kg7-g8 Rh1xb1 6.Rb4xb1 Be3-d2 7.h4-h5 Na8-c7 8.Rb1-g1 Bc8-b7 9.Rg1-g7 Bb7xe4 10.f7-f8Q+ Ne6xf8 11.Rg7xc7+ Kc5-d5 12.Rc7-g7 Bd2xc3
 12/24	00:00	 660k	15,350k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7
 13/23	00:00	 680k	15,449k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Rh1xd1 12.Qd7xd1 Re8xe5+ 13.Kh5-g6 Re5-e6+ 14.Kg6-f7
 14/33	00:00	 745k	15,856k	-6.63	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Rh1xd1 12.Qd7xd1 Re8xe5+ 13.Kh5-g6 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-c1 Bd6-e5 16.Qc1-d2 b6-b5 17.Kf7-g8
 15/35	00:00	 1,010k	17,116k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Rh1xd1 12.Qd7xd1 Re8xe5+ 13.Kh5-g6 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-a4 b6-b5 16.Qa4-a5 Bd6-e5 17.h4-h5 Re6-f6+ 18.Kf7-g8
 16/35	00:00	 1,090k	17,585k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Rh1xd1 12.Qd7xd1 Re8xe5+ 13.Kh5-g6 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-a4 b6-b5 16.Qa4-c2 Bd6-e5 17.h4-h5 Re6-f6+ 18.Kf7-e7
 17/32	00:00	 1,173k	17,770k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-a4 b6-b5 16.Qa4-c2 Bd6-e5
 18/33	00:00	 1,425k	18,749k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Rh1xd1 12.Qd7xd1 Re8xe5+ 13.Kh5-g6 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-a4 b6-b5 16.Qa4-c2 Bd6-e5 17.h4-h5 Re6-f6+ 18.Kf7-e7
 19/35	00:00	 1,704k	19,816k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-a4 b6-b5 16.Qa4-c2 Bd6-f4 17.Kf7-g7 Bf4-e5+ 18.Kg7-g8
 20/43	00:00	 2,152k	20,896k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-a4 b6-b5 16.Qa4-c2 Bd6-e5 17.h4-h5 Re6-f6+ 18.Kf7-e7 Rf6-h6 19.Qc2-d1 Rh6-e6+ 20.Ke7-f7 Be5xc3 21.e4-e5 Bc3xe5 22.Qd1-f3+ Kb7-b8
 21/42	00:00	 2,896k	22,447k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-a4 b6-b5 16.Qa4-c2 Bd6-e5 17.h4-h5 Re6-f6+ 18.Kf7-e7 Rf6-h6 19.Qc2-d1 Rh6-e6+ 20.Ke7-f7 Re6-f6+ 21.Kf7-g8 Be5xc3
 22/47	00:00	 3,520k	23,466k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-f3 Bd6-e5 16.h4-h5 b6-b5 17.Qf3-g2 Re6-f6+ 18.Kf7-e7 Rf6-c6 19.h3-h4 b5-b4 20.Qg2-g5 Be5-f6+ 21.Ke7-f7 Bf6xc3
 23/46	00:00	 3,994k	24,057k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Kf7-g8 Bd6-e5 16.h4-h5 b6-b5 17.Qd1-e1 Re6-c6 18.Qe1-c1 b5-b4 19.c3xb4 c4-c3 20.h5-h6 c3-c2 21.Kg8-f7 Be5-h8 22.Kf7-g8 Bh8-f6 23.Kg8-f7 Bf6-e5
 24/44	00:00	 4,977k	25,010k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Kf7-g8 Bd6-e5 16.h4-h5 b6-b5 17.Qd1-e1 Re6-h6 18.Kg8-f7 Rh6-f6+ 19.Kf7-e7 Rf6-e6+ 20.Ke7-f8 Re6-c6 21.Qe1-h4 Be5xc3 22.h5-h6 Bc3-f6
 25/49	00:00	 5,987k	25,368k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Kf7-g8 Bd6-e5 16.h4-h5 b6-b5 17.Qd1-e1 b5-b4 18.c3xb4 c4-c3 19.b4-b5 Nc7xb5 20.Qe1-d1 Re6-d6 21.Qd1-b3 Kb7-b6 22.h5-h6 Rd6-c6 23.h6-h7 c3-c2 24.Qb3-e3+ Rc6-c5
 26/52	00:00	 7,272k	26,064k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Kf7-g8 Bd6-e5 16.h4-h5 b6-b5 17.Qd1-c1 b5-b4 18.c3xb4 c4-c3 19.b4-b5 Nc7xb5 20.h5-h6 Kb7-b6 21.Kg8-h7 Re6-c6 22.Qc1-c2 Rc6-c7+ 23.Kh7-g8 Rc7-c8+ 24.Kg8-h7 Rc8-c5
 27/54	00:00	 8,817k	26,399k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Kf7-g8 Bd6-e5 16.Qd1-c1 b6-b5 17.h4-h5 b5-b4 18.h5-h6 b4-b3 19.h6-h7 Re6-g6+ 20.Kg8-f8 Rg6-b6 21.Kf8-g8 b3-b2 22.Qc1-b1 Be5xc3 23.e4-e5 Bc3xe5 24.Qb1-e4+ Rb6-c6 25.Qe4xe5
 28/55	00:00	 10,892k	26,762k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.h4-h5 Bd6-e5 16.Qd1-c1 b6-b5 17.h5-h6 b5-b4 18.c3xb4 Re6-f6+ 19.Kf7-g8 c4-c3 20.b4-b5 Nc7xb5 21.Qc1-g5 Rf6-e6 22.Kg8-f7 Nb5-d4 23.h6-h7 c3-c2 24.Qg5-d2 Re6-f6+ 25.Kf7-e8 Rf6-c6 26.Ke8-f7 Rc6-c7+ 27.Kf7-g6 c2-c1Q 28.Qd2xc1 Rc7xc1
 29/57	00:00	 16,016k	27,146k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.Qd1-f3 Bd6-e5 16.h4-h5 b6-b5 17.Qf3-g2 Re6-f6+ 18.Kf7-e7 Rf6-h6 19.h3-h4 Rh6-h7+ 20.Ke7-f8 Rh7xh5 21.Qg2-g4 Rh5-h8+ 22.Kf8-f7 Rh8-h6 23.h4-h5 Rh6-f6+ 24.Kf7-e7 b5-b4 25.c3xb4 c4-c3 26.Qg4-e2
 30/59	00:00	 18,227k	27,327k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Kd7-c6 21.Qc1-h1+ Kc6-d6 22.Qh1-d1+ Nc7-d5 23.Qd1-c1 Re6-e7+ 24.Kf7-g6 Kd6-c6 25.h6-h7 Re7-e8 26.Kg6-f7 Re8-d8 27.Qc1-h6+ Bh8-f6
 31/61	00:00	 21,003k	27,383k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.h4-h5 Bd6-e5 16.Qd1-c1 b6-b5 17.h5-h6 b5-b4 18.c3xb4 Re6-f6+ 19.Kf7-g8 c4-c3 20.b4-b5 Nc7xb5 21.Qc1-g5 Rf6-e6 22.Kg8-f7 Nb5-d4 23.h6-h7 c3-c2 24.Qg5-d2 Re6-b6 25.Qd2-g5 Rb6-b5 26.Kf7-g8 Kb7-b6 27.h3-h4 Nd4-c6 28.Qg5-c1 Rb5-c5 29.h4-h5 Nc6-d4 30.Qc1-b2+ Nd4-b5
 32/69	00:00	 23,983k	27,472k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Be5-h8 19.Qe3-d2 Kc8-b7 20.h5-h6 Kb7-c6 21.Qd2-g2+ Kc6-d6 22.Qg2-g3+ Kd6-d7 23.Qg3-h4 Bh8xc3 24.h6-h7 Bc3-h8 25.Kf7-g8 Bh8-e5 26.Qh4-g4 Kd7-c6 27.Qg4-e4+ Nc7-d5 28.Kg8-f7 Re6-e7+ 29.Kf7-g6 c4-c3 30.Qe4xe5 Re7xe5 31.h7-h8Q Re5-e7 32.h3-h4 Re7-c7 33.Qh8-a8+ Kc6-c5 34.Qa8-f8+ Nd5-e7+ 35.Kg6-f7
 33/65	00:00	 27,059k	27,611k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Be5-h8 19.Qe3-d2 Kc8-b7 20.h5-h6 Kb7-c6 21.Qd2-g2+ Kc6-d6 22.Qg2-g3+ Kd6-d7 23.Qg3-h4 Bh8xc3 24.h6-h7 Bc3-h8 25.Kf7-g8 Bh8-e5 26.Qh4-h5 Re6-e8+ 27.Kg8-f7 Re8-e7+ 28.Kf7-g6 Be5-h8 29.Qh5-g4+ Re7-e6+ 30.Kg6-f7 c4-c3 31.Qg4-d1+ Re6-d6 32.Qd1-h5 Bh8-d4
 34/74	00:01	 31,053k	27,751k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Be5-h8 19.Qe3-d2 Kc8-b7 20.h5-h6 Kb7-c6 21.Qd2-g2+ Kc6-d6 22.Qg2-g3+ Kd6-d7 23.Kf7-g8 Bh8-e5 24.Qg3-e3 Re6-e7 25.Qe3-c5 Be5xc3 26.h3-h4 Re7-e5 27.Qc5-a3 Nc7-d5 28.Qa3-a7+ Kd7-c6 29.Qa7-a6+ Nd5-b6 30.Kg8-f8 Re5-d5
 35/75	00:01	 35,847k	27,617k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Kd7-c6 21.Qc1-h1+ Kc6-d6 22.Qh1-c1 Bh8-e5 23.Qc1-g5 Be5xc3 24.h6-h7 Kd6-c6 25.Qg5-g2+ Kc6-d7 26.h3-h4 Bc3-e5 27.Qg2-f2 Re6-e7+ 28.Kf7-g6 Be5-h8 29.Qf2-f8 Re7-e8 30.Qf8-f5+ Re8-e6+ 31.Kg6-f7 Kd7-c6 32.Qf5-g4 c4-c3 33.Kf7-g8 Re6-e8+ 34.Kg8-f7 Re8-d8 35.Qg4-g5 Rd8-d5 36.Qg5-g2 Bh8-d4 37.h4-h5
 36/79	00:01	 42,447k	27,123k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.Kf7-g8 Bh8-e5 22.Qc1-g5 Be5-f6 23.Qg5-e3 Kd7-c6 24.h6-h7 Rd6-d8+ 25.Kg8-f7 Nc7-d5 26.Qe3-e6+ Kc6-b7 27.h3-h4 Bf6xc3 28.h4-h5 Bc3-d4 29.Qe6-g4 Bd4-h8 30.Qg4-g8 Kb7-c7 31.Kf7-e6 c4-c3 32.Qg8-f7+ Kc7-c6 33.Qf7-g8 Rd8-d6+ 34.Ke6-f5 c3-c2 35.Qg8xh8 c2-c1Q 36.Qh8-c8+ Nd5-c7 37.h7-h8Q Qc1-f1+ 38.Kf5-g5 Qf1-g1+ 39.Kg5-f5 Rd6-d5+ 40.Kf5-f6
 37/67	00:01	 53,300k	27,028k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Nc7-d5 21.h6-h7 Re6-e7+ 22.Kf7-g6 Re7-e8 23.Qc1-a3 Bh8xc3 24.Qa3-c5 Re8-e6+ 25.Kg6-g5 Re6-e5+ 26.Kg5-h6 Nd5-c7 27.Qc5-g1 Re5-d5 28.h3-h4 Kd7-c6 29.h4-h5 Rd5-d6+ 30.Kh6-g5 Bc3-h8 31.Kg5-f5 c4-c3 32.Qg1-g2+ Kc6-b6 33.Qg2-g8
 38/75	00:02	 79,115k	26,773k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Rh1xd1 12.Qd7xd1 Re8xe5+ 13.Kh5-g6 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Rd6-d7+ 23.Kf7-g6 Rd7-d8 24.Qc1-b2 Rd8-a8 25.h6-h7 Nc7-d5 26.Kg6-g5 Bh8xc3 27.Qb2-e2 Kc6-c5 28.Qe2-f2+ Bc3-d4 29.Qf2-f7 c4-c3 30.Qf7-b7
 39/75	00:03	 90,169k	26,404k	-6.56	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-e7+ 21.Kf7-g6 Nc7-d5 22.h6-h7 Re7-e8 23.Qc1-a3 Bh8xc3 24.h3-h4 Kd7-c6 25.h4-h5 Re8-h8 26.Qa3-a2 Rh8-f8 27.Kg6-h6 Rf8-d8 28.Kh6-g6 Kc6-b7 29.Qa2-g2 b5-b4 30.Qg2-e4 Rd8-d6+ 31.Kg6-g5 Bc3-f6+ 32.Kg5-h6 c4-c3 33.Qe4-c4 Bf6-e7+ 34.Kh6-g7
 40/72	00:03	 102,025k	26,322k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d8 24.Qa1-a5 Rd8-c8 25.h6-h7 Bh8xc3 26.Qa5-a2 Rc8-d8 27.Kf7-g6 Rd8-f8 28.Kg6-h6 Rf8-c8 29.Qa2-e2 Rc8-d8 30.Kh6-g5 Rd8-a8 31.Kg5-g4 Ra8-h8 32.Qe2-e6+ Kc6-c5 33.Qe6-f7 b5-b4 34.Qf7-b7 b4-b3 35.Qb7-a7+ Nd5-b6 36.Qa7-e7+ Kc5-c6 37.Qe7-e6+ Kc6-b5 38.Qe6-f5+ Kb5-a6
 41/74	00:04	 111,029k	26,562k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d8 24.Qa1-a5 Rd8-c8 25.h6-h7 Bh8xc3 26.Qa5-a2 Rc8-d8 27.Kf7-g6 Rd8-f8 28.Kg6-h6 Rf8-c8 29.Qa2-e2 Rc8-d8 30.Kh6-g5 Rd8-a8 31.Kg5-g4 Ra8-h8 32.Qe2-e6+ Kc6-c5 33.Qe6-f7 b5-b4 34.Qf7-b7 b4-b3 35.Qb7-a7+ Nd5-b6 36.Qa7-e7+ Kc5-b5 37.Qe7-g5+ Kb5-a6
 42/72	00:05	 133,626k	26,529k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d8 24.Qa1-a5 Rd8-c8 25.h6-h7 Bh8xc3 26.Qa5-a2 Rc8-d8 27.Kf7-g6 Rd8-f8 28.Kg6-h6 Rf8-c8 29.Qa2-e2 Rc8-d8 30.Kh6-g5 Rd8-a8 31.Kg5-g4 Ra8-h8 32.Qe2-e6+ Kc6-c5 33.Qe6-f7 Rh8xh7 34.Qf7-f8+ Rh7-e7 35.h5-h6 Bc3-e5 36.h6-h7 c4-c3
 43/79	00:06	 160,439k	26,414k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d8 24.Qa1-a5 Rd8-c8 25.h6-h7 Bh8xc3 26.Qa5-a2 Rc8-h8 27.Kf7-g6 Rh8-f8 28.Kg6-h6 Rf8-c8 29.Qa2-e2 Rc8-d8 30.Kh6-g5 Rd8-a8 31.Kg5-g4 Ra8-h8 32.Qe2-e6+ Kc6-c5 33.Qe6-f7 b5-b4 34.Qf7-a7+ Kc5-c6 35.Qa7-a4+ Kc6-b6 36.Kg4-f3 Rh8xh7 37.Qa4-e8 Rh7-h8 38.Qe8-d7 Kb6-c5 39.Qd7-a7+ Nd5-b6 40.h5-h6
 44/81	00:07	 182,094k	25,954k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d8 24.Qa1-a5 Rd8-c8 25.h6-h7 Bh8xc3 26.Qa5-a2 Rc8-h8 27.Kf7-g6 Rh8-f8 28.Kg6-h6 Rf8-c8 29.Qa2-e2 Rc8-d8 30.Kh6-g5 Rd8-a8 31.Kg5-g4 Ra8-h8 32.h5-h6 Rh8xh7 33.Qe2-e6+ Kc6-c5 34.Qe6-c8+ Kc5-d4 35.Qc8-b8 b5-b4 36.Qb8-g3 Kd4-c5 37.Qg3-f2+ Kc5-d6 38.Qf2-f8+ Kd6-c6 39.Qf8-a8+ Kc6-c5 40.Qa8-c8+ Rh7-c7
 45/80	00:07	 202,555k	25,725k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d8 24.Qa1-a5 Rd8-c8 25.h6-h7 Bh8xc3 26.Qa5-a2 Rc8-h8 27.Kf7-g6 Rh8-d8 28.h5-h6 Rd8-h8 29.Kg6-g5 Rh8xh7 30.Qa2-a8+ Kc6-c5 31.Qa8-a3+ b5-b4 32.Qa3-a5+ Kc5-c6 33.Qa5-a8+ Rh7-b7 34.Qa8-c8+ Rb7-c7 35.Qc8-a8+ Kc6-b5 36.Qa8-b8+ Kb5-c5 37.Qb8-f8+ Rc7-e7 38.h6-h7 Kc5-b5 39.Kg5-g6 Re7-d7 40.Qf8-e8 Nd5-b6
 46/84	00:09	 248,164k	24,881k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d8 24.Qa1-a5 Rd8-c8 25.h6-h7 Bh8xc3 26.Qa5-a2 Rc8-h8 27.Kf7-g6 Rh8-d8 28.h5-h6 Rd8-h8 29.Kg6-g5 Rh8xh7 30.Qa2-a8+ Kc6-c5 31.Qa8-a3+ b5-b4 32.Qa3-a5+ Kc5-c6 33.Qa5-a8+ Rh7-b7 34.Qa8-c8+ Rb7-c7 35.Qc8-a8+ Kc6-b5 36.Qa8-b8+ Kb5-c5 37.Qb8-f8+ Rc7-e7 38.h6-h7 Kc5-b5 39.Kg5-g6 Re7-d7 40.Qf8-e8 Nd5-b6 41.Kg6-f5 b4-b3 42.h7-h8Q Bc3xh8
 47/85	00:12	 291,463k	24,274k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d7+ 24.Kf7-g6 Rd7-d8 25.Qa1-a5 Nd5-c7 26.Kg6-h7 Rd8-e8 27.Qa5-a3 Bh8-e5 28.Qa3-b2 Nc7-d5 29.Qb2-a2 Be5xc3 30.Kh7-g6 Kc6-b7 31.Kg6-g5 Re8-g8+ 32.Kg5-f5 Rg8-a8 33.Qa2-e2 Kb7-c6 34.Kf5-g4 Bc3-f6 35.Qe2-e6+ Kc6-c5 36.Kg4-f3 c4-c3 37.Qe6-f5 Ra8-d8 38.h6-h7 b5-b4 39.Qf5-b1 Rd8-h8 40.Kf3-e2 Rh8-e8+ 41.Ke2-f3
 48/78	00:14	 354,483k	24,174k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d7+ 24.Kf7-g6 Rd7-d8 25.Qa1-a5 Nd5-c7 26.Kg6-h7 Rd8-e8 27.Qa5-a3 Bh8-e5 28.Qa3-b2 Nc7-d5 29.Qb2-a2 Be5xc3 30.Kh7-g6 Kc6-b7 31.Qa2-g2 Re8-g8+ 32.Kg6-h7 Rg8-d8 33.Kh7-g6 Rd8-d7 34.Qg2-e4 Kb7-c6 35.h6-h7 Kc6-c5 36.Qe4-f5 Rd7-d8 37.h5-h6 b5-b4 38.Qf5-f7 b4-b3 39.Qf7-a7+ Kc5-b5
 49/84	00:20	 475,723k	22,722k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d7+ 24.Kf7-g6 Rd7-d8 25.Qa1-a5 Nd5-c7 26.Kg6-h7 Rd8-e8 27.Qa5-a3 Bh8-e5 28.Qa3-b2 Nc7-d5 29.Qb2-a2 Be5xc3 30.Kh7-g6 Kc6-b7 31.Qa2-g2 Re8-g8+ 32.Kg6-h7 Rg8-d8 33.Kh7-g6 Kb7-c7 34.Qg2-a2 Kc7-b6 35.h6-h7 Rd8-c8 36.Qa2-f2+ Kb6-c6 37.h5-h6 b5-b4 38.Qf2-f3 Rc8-a8 39.Qf3-f7 b4-b3 40.h7-h8R
 50/81	00:25	 566,485k	22,383k	-6.87	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d7+ 24.Kf7-g6 Rd7-d8 25.Qa1-a5 Nd5-c7 26.Kg6-h7 Rd8-e8 27.Qa5-a3 Bh8-e5 28.Qa3-b2 Nc7-d5 29.Qb2-a2 Be5xc3 30.Kh7-g6 Kc6-b7 31.Qa2-g2 Re8-g8+ 32.Kg6-h7 Rg8-d8 33.Kh7-g6 Kb7-c6 34.Qg2-a2 Bc3-h8 35.Qa2-a6+ Nd5-b6 36.Qa6-a3 c4-c3 37.h6-h7 Rd8-e8 38.Qa3-a2 Re8-c8 39.h5-h6 Kc6-b7 40.Qa2-g2+ Rc8-c6+ 41.Kg6-h5
 51/91	00:38	 815,653k	21,247k	-6.85	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d7+ 24.Kf7-g6 Rd7-d8 25.Qa1-a5 Nd5-c7 26.Kg6-h7 Bh8-e5 27.Qa5-a1 Rd8-a8 28.Qa1-e1 Kc6-d6 29.Qe1-f2 Nc7-d5 30.Qf2-f7 Be5xc3 31.Qf7-b7 Ra8-h8+ 32.Kh7-g6 Kd6-c5 33.Qb7-a7+ Kc5-c6 34.Qa7-a2 Rh8-g8+ 35.Kg6-f7 Rg8-c8 36.Kf7-g6 Kc6-b7 37.Qa2-g2 Rc8-c5 38.Qg2-f3 b5-b4 39.Qf3-f7+ Kb7-b6 40.h6-h7
 52/91	01:45	 2,182,133k	20,590k	-6.85	1.Kg4-h5 Nh7-f8 2.Qf1-c1 Na8-c7 3.Qc1-g5 Rc6-g6 4.Qg5-d8 Kc5-c6 5.Qd8xf8 Rg6-e6 6.Rb4xb5 Bc8-d7 7.Rb5-d5 Bg1-c5 8.Qf8-d8 Bd7-e8 9.f7xe8B+ Re6xe8 10.Qd8-d7+ Kc6-b7 11.Rd5-d1 Re8xe5+ 12.Kh5-g6 Rh1xd1 13.Qd7xd1 Re5-e6+ 14.Kg6-f7 Bc5-d6 15.e4-e5 Bd6xe5 16.Qd1-f3+ Kb7-c8 17.h4-h5 b6-b5 18.Qf3-e3 Kc8-d7 19.h5-h6 Be5-h8 20.Qe3-c1 Re6-d6 21.h3-h4 Kd7-c6 22.h4-h5 Nc7-d5 23.Qc1-a1 Rd6-d7+ 24.Kf7-g6 Rd7-d8 25.Qa1-a5 Nd5-c7 26.Kg6-h7 Bh8-e5 27.Qa5-a1 Rd8-a8 28.Qa1-e1 Kc6-d6 29.Qe1-f2 Nc7-d5 30.Qf2-f7 Be5xc3 31.Qf7-b7 Ra8-h8+ 32.Kh7-g6 Kd6-c5 33.Qb7-a7+ Kc5-c6 34.Qa7-a2 Rh8-g8+ 35.Kg6-f7 Rg8-c8 36.Kf7-g6 Kc6-b7 37.Qa2-g2 Rc8-c5 38.Qg2-f3 b5-b4 39.Qf3-f7+ Kb7-b6 40.h6-h7
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