Some top engines solve this instantly, but Humans ?

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

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Chessqueen
Posts: 5582
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Some top engines solve this instantly, but Humans ?

Post by Chessqueen »

There are two positions that stuck into my mind from the book The Complete Chess Swindler by GM David Smerdon. This Position is the first position that you find on page 9, where Black seems to be winning obviously, but if you are a great Swindler you can still draw with White.
[d]8/8/8/2b4p/8/p5k1/3N4/7K w - - 0 1

A Rook down how can you save from losing this game, remember playing versus human even GM, it might NOT work against top engines.
[d]k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1

[pgn][Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2020.08.07"]
[Round "?"]
[White "ChessQueen"]
[Black "Komodo-13.3-64bit"]
[Result "1/2-1/2"]
[BlackElo "2400"]
[Time "08:57:41"]
[WhiteElo "2000"]
[SetUp "1"]
[FEN "k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "1"]


1. cxb6 {(c5xb6 c7xb6 Rf6-c6 Rd7-a7+ Ka6xb6 Ra7-b7+ Kb6-a6 Rd5-h5 Rc6-c8+
Rb7-b8) -1.97/7 0} (1. c6 Re7 {(Rd7-e7 Rf6-f4 Rd5-h5 Rf4-d4 Re7-e8 Rd4-f4
Rh5xh6) +4.11/7 0} 2. h7 Rh5 {(Rd5-h5 Rf6-f4 Ka8-b8 Rf4-d4 Re7-e8 Rd4-d7
Rh5xh7) +4.19/7 0} 3. Rh6 Rxh6 {(Rh5xh6 h7-h8Q+ Rh6xh8 b4-b5 Re7-d7 c6xd7
Ka8-b8 d7-d8Q+ Rh8xd8) +6.31/7 0} 4. h8=Q+ Rxh8 {(Rh6xh8 b4-b5 Re7-d7 c6xd7
Rh8-g8 d7-d8Q+ Rg8xd8) +6.31/7} 5. b5 Rd7 {(Re7-d7 c6xd7 f7-f6 d7-d8Q+
Rh8xd8) +6.31/7} 6. cxd7 f6 7. d8=Q+ {(d7-d8Q+ Rh8xd8) 0.00/7 0} Rxd8
{Stalemate}) 1/2-1/2[/pgn]
Do NOT worry and be happy, we all live a short life :roll:
Top
Karlo Bala
Posts: 373
Joined: Wed Mar 22, 2006 10:17 am
Location: Novi Sad, Serbia
Full name: Karlo Balla

Re: Some top engines solve this instantly, but Humans ?

Post by Karlo Bala »

Chessqueen wrote: ↑Fri Aug 07, 2020 4:11 pm There are two positions that stuck into my mind from the book The Complete Chess Swindler by GM David Smerdon. This Position is the first position that you find on page 9, where Black seems to be winning obviously, but if you are a great Swindler you can still draw with White.
[d]8/8/8/2b4p/8/p5k1/3N4/7K w - - 0 1

A Rook down how can you save from losing this game, remember playing versus human even GM, it might NOT work against top engines.
[d]k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1

[pgn][Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2020.08.07"]
[Round "?"]
[White "ChessQueen"]
[Black "Komodo-13.3-64bit"]
[Result "1/2-1/2"]
[BlackElo "2400"]
[Time "08:57:41"]
[WhiteElo "2000"]
[SetUp "1"]
[FEN "k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "1"]


1. cxb6 {(c5xb6 c7xb6 Rf6-c6 Rd7-a7+ Ka6xb6 Ra7-b7+ Kb6-a6 Rd5-h5 Rc6-c8+
Rb7-b8) -1.97/7 0} (1. c6 Re7 {(Rd7-e7 Rf6-f4 Rd5-h5 Rf4-d4 Re7-e8 Rd4-f4
Rh5xh6) +4.11/7 0} 2. h7 Rh5 {(Rd5-h5 Rf6-f4 Ka8-b8 Rf4-d4 Re7-e8 Rd4-d7
Rh5xh7) +4.19/7 0} 3. Rh6 Rxh6 {(Rh5xh6 h7-h8Q+ Rh6xh8 b4-b5 Re7-d7 c6xd7
Ka8-b8 d7-d8Q+ Rh8xd8) +6.31/7 0} 4. h8=Q+ Rxh8 {(Rh6xh8 b4-b5 Re7-d7 c6xd7
Rh8-g8 d7-d8Q+ Rg8xd8) +6.31/7} 5. b5 Rd7 {(Re7-d7 c6xd7 f7-f6 d7-d8Q+
Rh8xd8) +6.31/7} 6. cxd7 f6 7. d8=Q+ {(d7-d8Q+ Rh8xd8) 0.00/7 0} Rxd8
{Stalemate}) 1/2-1/2[/pgn]
No way that first position is a draw...
Best Regards,
Karlo Balla Jr.
Top
MOBMAT
Posts: 385
Joined: Sat Feb 04, 2017 11:57 pm
Location: USA

Re: Some top engines solve this instantly, but Humans ?

Post by MOBMAT »

[d]k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1
Looks like the best white can do is lose in 30.

Code: Select all

FEN: k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1

Houdini 6 (N6):
 13	00:00	 2,115,956	9,841,000	-4.18	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg2 Rxh7 6.Rg4 Rch8 7.Kb5 Rh6 8.Rd4 Rh4 9.Rxh4
 14	00:00	 3,217,411	10,117,000	-4.42	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg3 Rxh7 6.Kb5 Rh6 7.Ka4 Rxc6 8.Rh3 Rd6 9.Rh2 Rcd8 10.b5
 15	00:00	 6,653,860	9,813,000	-4.91	1.Kb5 bxc5 2.bxc5 Kb8 3.Kc4 Rh5 4.Kb5 Re7 5.Kc4 Kb7 6.Kd4 Kc8 7.Kc4 Kb8 8.Kb5
 16	00:00	 7,458,153	9,598,000	-4.86	1.Kb5 bxc5 2.bxc5 Kb8 3.Kc6 Kc8 4.Kb5 Rh5 5.Kb4 Re7 6.Kc4 Kd7 7.Kd4 Kd8 8.Kc4 Ke8 9.Kb5 Re6 10.Rf2
 17	00:01	 12,711,714	9,381,000	-5.49	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Kb8 4.Kb4 Rh4+ 5.Kb3 Rd3+ 6.Kc2 Rd5 7.c6 Rd6 8.Rf5 Rxc6+ 9.Kd1 Rd6+ 10.Ke2
 18	00:01	 17,612,462	9,687,000	-6.06	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rd8 8.Rg4 Rdh8 9.Rg2 Rh4 10.Re2 R4h5+ 11.Kc4 R8h6 12.Kd3 Rxc6 13.Re8+ Ka7 14.Ke3
 19	00:03	 36,508,458	11,144,000	-7.54	1.c6 Rd8 2.h7 Rh5 3.Rf4 Kb8 4.Re4 Rxh7 5.Kb5 Rh5+ 6.Kc4 b5+ 7.Kb3 Rd6 8.Re8+ Ka7 9.Re3 Rxc6 10.Rf3 Kb7 11.Re3 Rc4 12.Rf3 Rhh4 13.Kb2
 20-	00:04	 45,698,956	11,393,000	-9.85	1.c6 Rd8
 20+	00:04	 46,482,556	11,406,000	-8.86	1.h7
 20-	00:04	 46,704,212	11,405,000	-9.35	1.h7 Rh5
 20-	00:05	 62,455,073	10,985,000	-17.67	1.h7 Rh5
 20+	00:05	 63,731,467	10,990,000	-15.56	1.h7
 20+	00:05	 64,123,076	10,929,000	-11.59	1.h7
 20	00:06	 71,602,106	10,628,000	-81.48	1.h7 Rh5 2.Rf5 Rxh7 3.Re5 Rh8 4.Kb5 Rh6 5.Ka4 bxc5 6.Kb3 Rh3+ 7.Kc2 cxb4 8.Re2 b3+ 9.Kb2 Kb7 10.Rf2 Rd6 11.Kb1 Ra6 12.Rf1 b2 13.Kc2 Rc6+ 14.Kxb2
 20	00:06	 73,800,681	10,605,000	-81.48	1.h7 Rh5 2.Rf5 Rxh7 3.Re5 Rh8 4.Kb5 Rh6 5.Ka4 bxc5 6.Kb3 Rh3+ 7.Kc2 cxb4 8.Re2 b3+ 9.Kb2 Kb7 10.Rf2 Rd6 11.Kb1 Ra6 12.Rf1 b2 13.Kc2 Rc6+ 14.Kxb2
 21+	00:07	 74,446,469	10,621,000	-17.49	1.h7
 21	00:08	 86,626,237	9,760,000	-81.44	1.h7 Rh5 2.Rf3 bxc5 3.Kb5 Kb7 4.Ka4 Rxh7 5.Kb3 cxb4 6.Rg3 Rd6 7.Kc4 Rh4+ 8.Kb3 Ra6 9.Rg1 Rc6 10.Kb2 Rh2+ 11.Kb3 Rc3+ 12.Ka4
 21	00:09	 89,087,624	9,539,000	-81.44	1.h7 Rh5 2.Rf3 bxc5 3.Kb5 Kb7 4.Ka4 Rxh7 5.Kb3 cxb4 6.Rg3 Rd6 7.Kc4 Rh4+ 8.Kb3 Ra6 9.Rg1 Rc6 10.Kb2 Rh2+ 11.Kb3 Rc3+ 12.Ka4
 22+	00:12	 110,669,694	8,886,000	-80.57	1.h7
 22+	00:12	 110,695,070	8,884,000	-79.70	1.h7
 22+	00:12	 110,699,388	8,883,000	-77.95	1.h7
 22	00:12	 112,556,216	8,783,000	-82.72	1.h7 Rh5 2.c6 Rd3 3.h8R+ Rxh8 4.Rf5 Rhd8 5.Rg5 R3d4 6.Rg1 Kb8 7.Rh1 Rxb4 8.Rh2 Ra4+ 9.Kb5 Rad4 10.Ka6 R4d5 11.Ra2 Kc8 12.Ra3 Ra5+ 13.Rxa5 bxa5 14.Ka7
 22+	00:13	 114,872,203	8,680,000	-77.74	1.c6
 22+	00:14	 120,746,729	8,440,000	-63.78	1.c6
 22	00:14	 123,195,314	8,457,000	-82.64	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Rg7 R1h5+ 10.Kc4 R8h6 11.Rg8+ Ka7 12.Kd4 Rxc6 13.Ke4 Rh4+ 14.Kd3 Kb7 15.b5 Rc5 16.Ke3 Rxb5 17.Kd2
 22	00:14	 125,832,117	8,403,000	-82.64	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Rg7 R1h5+ 10.Kc4 R8h6 11.Rg8+ Ka7 12.Kd4 Rxc6 13.Ke4 Rh4+ 14.Kd3 Kb7 15.b5 Rc5 16.Ke3 Rxb5 17.Kd2
 23+	00:14	 125,856,645	8,402,000	-82.57	1.c6
 23+	00:14	 125,872,308	8,401,000	-82.50	1.c6
 23+	00:15	 126,130,676	8,390,000	-73.74	1.c6
 23	00:15	 128,058,781	8,337,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Ka6 R1h5 10.Rd4 R5h6 11.Rf4 Rd8 12.Kb5 Rh5+ 13.Kc4 Rd6 14.Rf8+ Ka7 15.Kc3
 23	00:15	 128,162,259	8,337,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Ka6 R1h5 10.Rd4 R5h6 11.Rf4 Rd8 12.Kb5 Rh5+ 13.Kc4 Rd6 14.Rf8+ Ka7 15.Kc3
 24+	00:15	 128,235,525	8,334,000	-82.65	1.c6
 24+	00:15	 128,323,858	8,330,000	-82.58	1.c6
 24+	00:15	 129,009,440	8,326,000	-23.18	1.c6
 24	00:15	 129,038,418	8,326,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 24	00:15	 129,038,915	8,326,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 25	00:15	 129,081,811	8,325,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4
 25	00:15	 129,082,139	8,325,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4
 26	00:15	 129,306,484	8,318,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 26	00:15	 129,364,771	8,318,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 27+	00:15	 131,575,227	8,293,000	-82.65	1.c6
 27	00:16	 137,605,498	8,331,000	-87.60	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg3 Rch8 8.Rf3 Rd8 9.Rf5 Rhd6 10.Rf1 Rd4 11.Ka6 Rh8 12.Kb5 Rhh4 13.Ka6 Rd8 14.Kb5
 27	00:17	 144,972,717	8,350,000	-87.60	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg3 Rch8 8.Rf3 Rd8 9.Rf5 Rhd6 10.Rf1 Rd4 11.Ka6 Rh8 12.Kb5 Rhh4 13.Ka6 Rd8 14.Kb5
 28+	00:17	 148,391,045	8,312,000	-87.53	1.c6
 28+	00:17	 148,420,579	8,313,000	-87.46	1.c6
 28+	00:18	 152,984,152	8,308,000	-12.75	1.c6
 28	01:01	 299,016,594	4,896,000	-M55	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Rdd5 5.Ra2 Rh3 6.Ra1 Kb8 7.Ra2 Rxh7 8.Re2 Rh8 9.Re7 Rhd8 10.Re1 Rd4 11.Kb5 Rd3 12.Re5 R3d5+ 13.Rxd5 Rxd5+ 14.Kc4 Rd4+ 15.Kb3 Rxb4+ 16.Kc2 Rc4+ 17.Kd3
 28	01:14	 362,478,130	4,865,000	-M55	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Rdd5 5.Ra2 Rh3 6.Ra1 Kb8 7.Ra2 Rxh7 8.Re2 Rh8 9.Re7 Rhd8 10.Re1 Rd4 11.Kb5 Rd3 12.Re5 R3d5+ 13.Rxd5 Rxd5+ 14.Kc4 Rd4+ 15.Kb3 Rxb4+ 16.Kc2 Rc4+ 17.Kd3
 29+	01:19	 389,320,701	4,919,000	-M62	1.c6
 29+	01:19	 389,406,164	4,919,000	-M69	1.c6
 29+	01:19	 389,570,686	4,920,000	-97.81	1.c6
 29	01:19	 393,792,482	4,946,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Rf2 Rc3 12.Rf6 Ra3+ 13.Kxb5 Ka7 14.Rf5 Rah3 15.Rf6 Rb8+ 16.Kc5 Rh5+ 17.Kc4
 29	01:19	 396,760,485	4,962,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Rf2 Rc3 12.Rf6 Ra3+ 13.Kxb5 Ka7 14.Rf5 Rah3 15.Rf6 Rb8+ 16.Kc5 Rh5+ 17.Kc4
 30	01:20	 397,907,705	4,969,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Kxb5 R8h5+ 12.Ka4 Ka7 13.Rf8 Rh8 14.Rf5 R3h5 15.Rf1 Kb6 16.Kb3 Rh3+ 17.Kc4
 30	01:20	 400,521,288	4,981,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Kxb5 R8h5+ 12.Ka4 Ka7 13.Rf8 Rh8 14.Rf5 R3h5 15.Rf1 Kb6 16.Kb3 Rh3+ 17.Kc4
 31	01:22	 423,757,958	5,119,000	-M58	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Re2 Ka8 11.Kxb5 Rh5+ 12.Kc4 Ka7 13.Kd4 Kb6 14.Re6 Rh4+ 15.Kd3 Rxb4 16.Ke3 Rh3+ 17.Kf2
 31	01:25	 437,933,449	5,137,000	-M58	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Re2 Ka8 11.Kxb5 Rh5+ 12.Kc4 Ka7 13.Kd4 Kb6 14.Re6 Rh4+ 15.Kd3 Rxb4 16.Ke3 Rh3+ 17.Kf2
 32+	01:25	 440,048,241	5,139,000	-M65	1.c6
 32+	01:25	 440,083,779	5,139,000	-M72	1.c6
 32+	01:25	 440,195,522	5,140,000	-103.38	1.c6
 32	01:52	 592,753,504	5,273,000	-M51	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Rg7 Ka8 9.Kxb5 Ka7 10.Rf7 Rh5+ 11.Kc4 Rh8 12.Kd3 Kb6 13.Rf1 R8xh7 14.Rf8 Rh3+ 15.Ke2 Kxc6 16.Kf1 R7h4
 32	02:02	 669,056,510	5,454,000	-M51	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Rg7 Ka8 9.Kxb5 Ka7 10.Rf7 Rh5+ 11.Kc4 Rh8 12.Kd3 Kb6 13.Rf1 R8xh7 14.Rf8 Rh3+ 15.Ke2 Kxc6 16.Kf1 R7h4
 33	02:39	 936,447,757	5,888,000	-M35	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Kb8 5.Ra2 Rxh7 6.Rg2 Rh8 7.Re2 Rhd8 8.Re5 R3d4 9.Kb5 R4d5+ 10.Rxd5 Rxd5+ 11.Kc4 b5+ 12.Kc3 Rd2 13.Kb3 Rc2 14.Ka3 Rb2 15.Kxb2 Ka7 16.Kc3 Kb6 17.Kd4
 33	05:35	2,465,672,708	7,353,000	-M36	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rg2 Rh1 14.Kc3 Rd1 15.Rg5 Rc6+ 16.Kb2 Kb7 17.Ra5 Rd2+ 18.Kb3
 33	05:36	2,472,449,173	7,352,000	-M36	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rg2 Rh1 14.Kc3 Rd1 15.Rg5 Rc6+ 16.Kb2 Kb7 17.Ra5 Rd2+ 18.Kb3
 34	06:07	2,760,799,874	7,520,000	-M32	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rb5 Rh4+ 14.Kd3 Ra6 15.Rg5 Ra3+ 16.Kc2 Rh2+ 17.Kb1 Rf3 18.Rg8+ Kb7 19.Rg1 Rb3+ 20.Kc1 Rc3+ 21.Kb1 Rh5 22.Ka2 Rb5 23.Rf1
 34	06:07	2,765,147,720	7,523,000	-M32	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rb5 Rh4+ 14.Kd3 Ra6 15.Rg5 Ra3+ 16.Kc2 Rh2+ 17.Kb1 Rf3 18.Rg8+ Kb7 19.Rg1 Rb3+ 20.Kc1 Rc3+ 21.Kb1 Rh5 22.Ka2 Rb5 23.Rf1
 35	06:27	2,946,333,552	7,609,000	-M31	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Ra4 14.Kf2 Kc6 15.Rb3 Rxc5
 35	06:27	2,946,334,052	7,609,000	-M31	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Ra4 14.Kf2 Kc6 15.Rb3 Rxc5
 36	06:36	3,035,713,848	7,656,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 36	06:36	3,035,715,035	7,656,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 37	06:52	3,171,027,756	7,688,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 37	06:52	3,171,028,430	7,688,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 38	07:26	3,426,121,528	7,667,000	-M27	1.Kb5 bxc5 2.bxc5 Rh5 3.h7 Rxh7 4.Kc6 Re7 5.Rf3 Rh6+ 6.Kd5 Rh5+ 7.Kd4 Kb7 8.c6+ Kxc6 9.Rc3+ Kd6 10.Rf3 Rd5+ 11.Kc4 Re4+ 12.Kb3 Kc5 13.Rc3+ Kb5 14.Rh3 Red4 15.Kb2 Rd2+ 16.Kc3 Rd8 17.Rg3 c5 18.Re3 c4 19.Re5+ R8d5
 38	07:26	3,426,124,515	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 38	07:26	3,426,125,222	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 39	07:26	3,426,127,757	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 39	07:26	3,426,128,204	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 40	07:26	3,426,129,549	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 40	07:26	3,426,129,818	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 41	07:26	3,426,131,898	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 41	07:26	3,426,132,117	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 42	07:26	3,426,150,120	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 42	07:26	3,426,150,427	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 43	07:26	3,426,152,301	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 43	07:26	3,426,152,556	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 44	07:26	3,426,164,252	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 44	07:26	3,426,164,427	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 45	07:26	3,426,184,218	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 45	07:26	3,426,184,260	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 46	07:26	3,426,361,177	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 46	07:26	3,426,361,410	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 47	07:26	3,426,445,689	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 47	07:26	3,426,445,977	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 48	07:26	3,426,546,729	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 48	07:26	3,426,547,016	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 49	07:26	3,426,629,163	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 49	07:26	3,426,629,230	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 50	07:26	3,426,707,235	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 50	07:26	3,426,707,297	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 51	07:26	3,426,800,750	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 51	07:26	3,426,800,834	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 52	07:26	3,426,919,448	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 52	07:26	3,426,919,968	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 53	07:27	3,427,068,017	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 53	07:27	3,427,068,620	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 54	07:27	3,427,513,699	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 54	07:27	3,427,514,013	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 55	07:27	3,427,984,564	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 55	07:27	3,427,985,043	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 56	07:27	3,428,242,370	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 56	07:27	3,428,242,708	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 57	07:27	3,428,469,216	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 57	07:27	3,428,469,627	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 58	07:27	3,428,685,789	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 58	07:27	3,428,685,845	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 59	07:27	3,428,947,872	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 59	07:27	3,428,948,497	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 60	07:28	3,437,321,307	7,663,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 60	07:41	3,592,863,144	7,789,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 61	07:45	3,636,407,202	7,817,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 61	07:51	3,678,131,528	7,804,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
And the first is a TB lookup.
[d]8/8/8/2b4p/8/p5k1/3N4/7K w - - 0 1
Best for white is Ne4+, then taking the Bishop, but white can't stop both pawns.
i7-6700K @ 4.00Ghz 32Gb, Win 10 Home, EGTBs on PCI SSD
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
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User avatar
Ajedrecista
Posts: 1969
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: Some top engines solve this instantly, but humans?

Post by Ajedrecista »

Hello:

I got the key ideas on the second position, trying to stalemate the white king with c6 and b5 while getting rid of the white rook and the h-pawn. Nice indeed!

I searched the first position. The original post and the key word is swindle: black is winning (white is lost in 19 moves according to Shredder online EGTB) but in this case rushing the a-pawn builds a draw by stalemate or a standard draw, so a2 is an 'avoid move' at some moment. The intended solutions are here:

Jammo's Chess Puzzle #51

1. Nb3 a2? 2. Nc1! a1=Q (½-½) Draw by stalemate.
1. Nb3 a2? 2. Nc1! a1=R (½-½) Draw by stalemate.
1. Nb3 a2? 2. Nc1! a1=B (½-½) Draw.
1. Nb3 a2? 2. Nc1! a1=N 3. Nb3! (½-½) Draw.

I have followed a kind of 'chess notation approach' according to 'chess annotation symbols' article at Wikipedia: '?' for a move that converts a win into a draw, a draw into a lose or a win into a lose; and '!' for the only legal move that does not worsen the result of the playing side (only move that wins on a won position or only move that draws in a drawn position).

The web wrongly quotes the game Firmian - Smejkal, Tallinn 1971. According to ChessGames, white side was not Nick de Firmian but Semyon Abramovich Furman, so Furman - Smejkal, Tallinn 1971:

Semyon Abramovich Furman vs Jan Smejkal, Tallinn (1971)

[pgn]
[Event "Tallinn"]
[Site "Tallinn EST"]
[Date "1971.02.26"]
[EventDate "?"]
[Round "5"]
[Result "0-1"]
[White "Semyon Abramovich Furman"]
[Black "Jan Smejkal"]
[ECO "D76"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "188"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 O-O 7.O-O
Nb6 8.Nc3 Nc6 9.e3 Re8 10.Nd2 e5 11.d5 Ne7 12.e4 c6 13.Nb3
cxd5 14.exd5 Nf5 15.Nc5 Nd6 16.b3 e4 17.Bd2 f5 18.Rc1 Nf7
19.Re1 Nxd5 20.Nxd5 Qxd5 21.f3 b6 22.Na4 Bb7 23.fxe4 Qd4+
24.Be3 Qxd1 25.Rexd1 Bxe4 26.Bxe4 Rxe4 27.Bf2 Re7 28.Nc3 Ne5
29.h3 Rae8 30.Kf1 Nf3 31.Nd5 Re2 32.Nc7 R8e7 33.Rd8+ Kf7
34.Nd5 Nd2+ 35.Kg1 Nf3+ 36.Kf1 Nd2+ 37.Kg1 Bb2 38.Rd1 Re8
39.Rxe8 Kxe8 40.Nf4 Nf3+ 41.Kg2 Rd2 42.Rxd2 Nxd2 43.g4 Kd7
44.gxf5 gxf5 45.Nd3 Bc3 46.Be3 Kd6 47.Kf2 Ne4+ 48.Kf3 Bf6
49.Bf4+ Kd7 50.Bb8 a5 51.Be5 Bd8 52.Ke3 Ng5 53.Nf4 Ne6 54.Nh5
Bg5+ 55.Kf3 Kc6 56.Ng3 Kd5 57.Bb2 Nd4+ 58.Bxd4 Kxd4 59.Nxf5+
Kc3 60.Ke4 Kb2 61.Kd3 Kxa2 62.Kc2 Ka3 63.Nd4 Kb4 64.Ne6 Be7
65.Nf4 Kc5 66.Kd3 Bf6 67.Ng2 Kb4 68.Kc2 Kc5 69.Kd3 b5 70.Ne3
Bg5 71.Nc2 Bf6 72.Ne3 Bb2 73.Kc2 Bd4 74.Nf1 Bf6 75.Nd2 Kd4
76.Nb1 Be5 77.Nc3 Kc5 78.Ne4+ Kd5 79.Ng5 h6 80.Nf3 Ke4 81.Nd2+
Kf4 82.Kd3 Kg3 83.h4 h5 84.Ke2 a4 85.bxa4 bxa4 86.Nc4 Bf6
87.Kf1 Bxh4 88.Kg1 Be7 89.Kh1 Bc5 90.Nd2 a3 91.Ne4+ Kf3
92.Nxc5 a2 93.Nb3 Ke4 94.Kg2 Kd5 0-1
[/pgn]

White to move just after black's 90th move.

Regards from Spain.

Ajedrecista.
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Chessqueen
Posts: 5582
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: Some top engines solve this instantly, but Humans ?

Post by Chessqueen »

[quote="Karlo Bala" post_id=855226 time=1596811581 user_id=711]
[quote=Chessqueen post_id=855209 time=1596809498 user_id=10732]

There are two positions that stuck into my mind from the book The Complete Chess Swindler by GM David Smerdon. This Position is the first position that you find on page 9, where Black seems to be winning obviously, but if you are a great Swindler you can still draw with White.
[d]8/8/8/2b4p/8/p5k1/3N4/7K w - - 0 1

A Rook down how can you save from losing this game, remember playing versus human even GM, it might NOT work against top engines. This is the move the draw 1.c6 !, I had a finger slipped. :roll:
[d]k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1

[Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2020.08.07"]
[Round "?"]
[White "ChessQueen"]
[Black "Komodo-13.3-64bit"]
[Result "1/2-1/2"]
[BlackElo "2400"]
[Time "08:57:41"]
[WhiteElo "2000"]
[SetUp "1"]
[FEN "k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "1"]


1. c6 Re7 {(Rd7-e7 Rf6-f1 Rd5-h5 Rf1-g1 Re7-e8 Rg1-g7 Rh5xh6) +4.10/7 0} 2.
h7 Rd8 {(Rd5-d8 Rf6-h6 Rd8-h8 Rh6-h5 f7-f6 Rh5-f5 Re7xh7) +3.83/7 0} 3. Rg6
Ree8 {(Re7-e8 Rg6-f6 Re8-f8 Ka6-b5 Ka8-b8 Rf6-f5 Rd8-d1) +2.42/7 0} 4. Rg8
f5 {(f7-f5 h7-h8Q Re8xg8 Qh8-e5 Ka8-b8 Qe5xf5 Rg8-g3) +0.42/7 0} 5. Rxe8
Rxe8 {(Rd8xe8 Ka6-b5 Re8-h8 Kb5-c4 Rh8xh7 Kc4-d4 Rh7-h3) +5.51/7 0} 6. h8=Q
Rxh8 {(Re8xh8 b4-b5 f5-f4) 0.00/7 0} 7. b5 f4 {(f5-f4) 0.00/7 Stalemate} *
Do NOT worry and be happy, we all live a short life :roll:
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Chessqueen
Posts: 5582
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: Some top engines solve this instantly, but Humans ?

Post by Chessqueen »

MOBMAT wrote: ↑Fri Aug 07, 2020 6:53 pm [d]k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1
Looks like the best white can do is lose in 30.

Code: Select all

FEN: k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1

Houdini 6 (N6):
 13	00:00	 2,115,956	9,841,000	-4.18	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg2 Rxh7 6.Rg4 Rch8 7.Kb5 Rh6 8.Rd4 Rh4 9.Rxh4
 14	00:00	 3,217,411	10,117,000	-4.42	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg3 Rxh7 6.Kb5 Rh6 7.Ka4 Rxc6 8.Rh3 Rd6 9.Rh2 Rcd8 10.b5
 15	00:00	 6,653,860	9,813,000	-4.91	1.Kb5 bxc5 2.bxc5 Kb8 3.Kc4 Rh5 4.Kb5 Re7 5.Kc4 Kb7 6.Kd4 Kc8 7.Kc4 Kb8 8.Kb5
 16	00:00	 7,458,153	9,598,000	-4.86	1.Kb5 bxc5 2.bxc5 Kb8 3.Kc6 Kc8 4.Kb5 Rh5 5.Kb4 Re7 6.Kc4 Kd7 7.Kd4 Kd8 8.Kc4 Ke8 9.Kb5 Re6 10.Rf2
 17	00:01	 12,711,714	9,381,000	-5.49	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Kb8 4.Kb4 Rh4+ 5.Kb3 Rd3+ 6.Kc2 Rd5 7.c6 Rd6 8.Rf5 Rxc6+ 9.Kd1 Rd6+ 10.Ke2
 18	00:01	 17,612,462	9,687,000	-6.06	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rd8 8.Rg4 Rdh8 9.Rg2 Rh4 10.Re2 R4h5+ 11.Kc4 R8h6 12.Kd3 Rxc6 13.Re8+ Ka7 14.Ke3
 19	00:03	 36,508,458	11,144,000	-7.54	1.c6 Rd8 2.h7 Rh5 3.Rf4 Kb8 4.Re4 Rxh7 5.Kb5 Rh5+ 6.Kc4 b5+ 7.Kb3 Rd6 8.Re8+ Ka7 9.Re3 Rxc6 10.Rf3 Kb7 11.Re3 Rc4 12.Rf3 Rhh4 13.Kb2
 20-	00:04	 45,698,956	11,393,000	-9.85	1.c6 Rd8
 20+	00:04	 46,482,556	11,406,000	-8.86	1.h7
 20-	00:04	 46,704,212	11,405,000	-9.35	1.h7 Rh5
 20-	00:05	 62,455,073	10,985,000	-17.67	1.h7 Rh5
 20+	00:05	 63,731,467	10,990,000	-15.56	1.h7
 20+	00:05	 64,123,076	10,929,000	-11.59	1.h7
 20	00:06	 71,602,106	10,628,000	-81.48	1.h7 Rh5 2.Rf5 Rxh7 3.Re5 Rh8 4.Kb5 Rh6 5.Ka4 bxc5 6.Kb3 Rh3+ 7.Kc2 cxb4 8.Re2 b3+ 9.Kb2 Kb7 10.Rf2 Rd6 11.Kb1 Ra6 12.Rf1 b2 13.Kc2 Rc6+ 14.Kxb2
 20	00:06	 73,800,681	10,605,000	-81.48	1.h7 Rh5 2.Rf5 Rxh7 3.Re5 Rh8 4.Kb5 Rh6 5.Ka4 bxc5 6.Kb3 Rh3+ 7.Kc2 cxb4 8.Re2 b3+ 9.Kb2 Kb7 10.Rf2 Rd6 11.Kb1 Ra6 12.Rf1 b2 13.Kc2 Rc6+ 14.Kxb2
 21+	00:07	 74,446,469	10,621,000	-17.49	1.h7
 21	00:08	 86,626,237	9,760,000	-81.44	1.h7 Rh5 2.Rf3 bxc5 3.Kb5 Kb7 4.Ka4 Rxh7 5.Kb3 cxb4 6.Rg3 Rd6 7.Kc4 Rh4+ 8.Kb3 Ra6 9.Rg1 Rc6 10.Kb2 Rh2+ 11.Kb3 Rc3+ 12.Ka4
 21	00:09	 89,087,624	9,539,000	-81.44	1.h7 Rh5 2.Rf3 bxc5 3.Kb5 Kb7 4.Ka4 Rxh7 5.Kb3 cxb4 6.Rg3 Rd6 7.Kc4 Rh4+ 8.Kb3 Ra6 9.Rg1 Rc6 10.Kb2 Rh2+ 11.Kb3 Rc3+ 12.Ka4
 22+	00:12	 110,669,694	8,886,000	-80.57	1.h7
 22+	00:12	 110,695,070	8,884,000	-79.70	1.h7
 22+	00:12	 110,699,388	8,883,000	-77.95	1.h7
 22	00:12	 112,556,216	8,783,000	-82.72	1.h7 Rh5 2.c6 Rd3 3.h8R+ Rxh8 4.Rf5 Rhd8 5.Rg5 R3d4 6.Rg1 Kb8 7.Rh1 Rxb4 8.Rh2 Ra4+ 9.Kb5 Rad4 10.Ka6 R4d5 11.Ra2 Kc8 12.Ra3 Ra5+ 13.Rxa5 bxa5 14.Ka7
 22+	00:13	 114,872,203	8,680,000	-77.74	1.c6
 22+	00:14	 120,746,729	8,440,000	-63.78	1.c6
 22	00:14	 123,195,314	8,457,000	-82.64	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Rg7 R1h5+ 10.Kc4 R8h6 11.Rg8+ Ka7 12.Kd4 Rxc6 13.Ke4 Rh4+ 14.Kd3 Kb7 15.b5 Rc5 16.Ke3 Rxb5 17.Kd2
 22	00:14	 125,832,117	8,403,000	-82.64	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Rg7 R1h5+ 10.Kc4 R8h6 11.Rg8+ Ka7 12.Kd4 Rxc6 13.Ke4 Rh4+ 14.Kd3 Kb7 15.b5 Rc5 16.Ke3 Rxb5 17.Kd2
 23+	00:14	 125,856,645	8,402,000	-82.57	1.c6
 23+	00:14	 125,872,308	8,401,000	-82.50	1.c6
 23+	00:15	 126,130,676	8,390,000	-73.74	1.c6
 23	00:15	 128,058,781	8,337,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Ka6 R1h5 10.Rd4 R5h6 11.Rf4 Rd8 12.Kb5 Rh5+ 13.Kc4 Rd6 14.Rf8+ Ka7 15.Kc3
 23	00:15	 128,162,259	8,337,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Ka6 R1h5 10.Rd4 R5h6 11.Rf4 Rd8 12.Kb5 Rh5+ 13.Kc4 Rd6 14.Rf8+ Ka7 15.Kc3
 24+	00:15	 128,235,525	8,334,000	-82.65	1.c6
 24+	00:15	 128,323,858	8,330,000	-82.58	1.c6
 24+	00:15	 129,009,440	8,326,000	-23.18	1.c6
 24	00:15	 129,038,418	8,326,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 24	00:15	 129,038,915	8,326,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 25	00:15	 129,081,811	8,325,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4
 25	00:15	 129,082,139	8,325,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4
 26	00:15	 129,306,484	8,318,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 26	00:15	 129,364,771	8,318,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 27+	00:15	 131,575,227	8,293,000	-82.65	1.c6
 27	00:16	 137,605,498	8,331,000	-87.60	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg3 Rch8 8.Rf3 Rd8 9.Rf5 Rhd6 10.Rf1 Rd4 11.Ka6 Rh8 12.Kb5 Rhh4 13.Ka6 Rd8 14.Kb5
 27	00:17	 144,972,717	8,350,000	-87.60	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg3 Rch8 8.Rf3 Rd8 9.Rf5 Rhd6 10.Rf1 Rd4 11.Ka6 Rh8 12.Kb5 Rhh4 13.Ka6 Rd8 14.Kb5
 28+	00:17	 148,391,045	8,312,000	-87.53	1.c6
 28+	00:17	 148,420,579	8,313,000	-87.46	1.c6
 28+	00:18	 152,984,152	8,308,000	-12.75	1.c6
 28	01:01	 299,016,594	4,896,000	-M55	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Rdd5 5.Ra2 Rh3 6.Ra1 Kb8 7.Ra2 Rxh7 8.Re2 Rh8 9.Re7 Rhd8 10.Re1 Rd4 11.Kb5 Rd3 12.Re5 R3d5+ 13.Rxd5 Rxd5+ 14.Kc4 Rd4+ 15.Kb3 Rxb4+ 16.Kc2 Rc4+ 17.Kd3
 28	01:14	 362,478,130	4,865,000	-M55	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Rdd5 5.Ra2 Rh3 6.Ra1 Kb8 7.Ra2 Rxh7 8.Re2 Rh8 9.Re7 Rhd8 10.Re1 Rd4 11.Kb5 Rd3 12.Re5 R3d5+ 13.Rxd5 Rxd5+ 14.Kc4 Rd4+ 15.Kb3 Rxb4+ 16.Kc2 Rc4+ 17.Kd3
 29+	01:19	 389,320,701	4,919,000	-M62	1.c6
 29+	01:19	 389,406,164	4,919,000	-M69	1.c6
 29+	01:19	 389,570,686	4,920,000	-97.81	1.c6
 29	01:19	 393,792,482	4,946,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Rf2 Rc3 12.Rf6 Ra3+ 13.Kxb5 Ka7 14.Rf5 Rah3 15.Rf6 Rb8+ 16.Kc5 Rh5+ 17.Kc4
 29	01:19	 396,760,485	4,962,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Rf2 Rc3 12.Rf6 Ra3+ 13.Kxb5 Ka7 14.Rf5 Rah3 15.Rf6 Rb8+ 16.Kc5 Rh5+ 17.Kc4
 30	01:20	 397,907,705	4,969,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Kxb5 R8h5+ 12.Ka4 Ka7 13.Rf8 Rh8 14.Rf5 R3h5 15.Rf1 Kb6 16.Kb3 Rh3+ 17.Kc4
 30	01:20	 400,521,288	4,981,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Kxb5 R8h5+ 12.Ka4 Ka7 13.Rf8 Rh8 14.Rf5 R3h5 15.Rf1 Kb6 16.Kb3 Rh3+ 17.Kc4
 31	01:22	 423,757,958	5,119,000	-M58	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Re2 Ka8 11.Kxb5 Rh5+ 12.Kc4 Ka7 13.Kd4 Kb6 14.Re6 Rh4+ 15.Kd3 Rxb4 16.Ke3 Rh3+ 17.Kf2
 31	01:25	 437,933,449	5,137,000	-M58	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Re2 Ka8 11.Kxb5 Rh5+ 12.Kc4 Ka7 13.Kd4 Kb6 14.Re6 Rh4+ 15.Kd3 Rxb4 16.Ke3 Rh3+ 17.Kf2
 32+	01:25	 440,048,241	5,139,000	-M65	1.c6
 32+	01:25	 440,083,779	5,139,000	-M72	1.c6
 32+	01:25	 440,195,522	5,140,000	-103.38	1.c6
 32	01:52	 592,753,504	5,273,000	-M51	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Rg7 Ka8 9.Kxb5 Ka7 10.Rf7 Rh5+ 11.Kc4 Rh8 12.Kd3 Kb6 13.Rf1 R8xh7 14.Rf8 Rh3+ 15.Ke2 Kxc6 16.Kf1 R7h4
 32	02:02	 669,056,510	5,454,000	-M51	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Rg7 Ka8 9.Kxb5 Ka7 10.Rf7 Rh5+ 11.Kc4 Rh8 12.Kd3 Kb6 13.Rf1 R8xh7 14.Rf8 Rh3+ 15.Ke2 Kxc6 16.Kf1 R7h4
 33	02:39	 936,447,757	5,888,000	-M35	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Kb8 5.Ra2 Rxh7 6.Rg2 Rh8 7.Re2 Rhd8 8.Re5 R3d4 9.Kb5 R4d5+ 10.Rxd5 Rxd5+ 11.Kc4 b5+ 12.Kc3 Rd2 13.Kb3 Rc2 14.Ka3 Rb2 15.Kxb2 Ka7 16.Kc3 Kb6 17.Kd4
 33	05:35	2,465,672,708	7,353,000	-M36	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rg2 Rh1 14.Kc3 Rd1 15.Rg5 Rc6+ 16.Kb2 Kb7 17.Ra5 Rd2+ 18.Kb3
 33	05:36	2,472,449,173	7,352,000	-M36	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rg2 Rh1 14.Kc3 Rd1 15.Rg5 Rc6+ 16.Kb2 Kb7 17.Ra5 Rd2+ 18.Kb3
 34	06:07	2,760,799,874	7,520,000	-M32	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rb5 Rh4+ 14.Kd3 Ra6 15.Rg5 Ra3+ 16.Kc2 Rh2+ 17.Kb1 Rf3 18.Rg8+ Kb7 19.Rg1 Rb3+ 20.Kc1 Rc3+ 21.Kb1 Rh5 22.Ka2 Rb5 23.Rf1
 34	06:07	2,765,147,720	7,523,000	-M32	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rb5 Rh4+ 14.Kd3 Ra6 15.Rg5 Ra3+ 16.Kc2 Rh2+ 17.Kb1 Rf3 18.Rg8+ Kb7 19.Rg1 Rb3+ 20.Kc1 Rc3+ 21.Kb1 Rh5 22.Ka2 Rb5 23.Rf1
 35	06:27	2,946,333,552	7,609,000	-M31	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Ra4 14.Kf2 Kc6 15.Rb3 Rxc5
 35	06:27	2,946,334,052	7,609,000	-M31	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Ra4 14.Kf2 Kc6 15.Rb3 Rxc5
 36	06:36	3,035,713,848	7,656,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 36	06:36	3,035,715,035	7,656,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 37	06:52	3,171,027,756	7,688,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 37	06:52	3,171,028,430	7,688,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 38	07:26	3,426,121,528	7,667,000	-M27	1.Kb5 bxc5 2.bxc5 Rh5 3.h7 Rxh7 4.Kc6 Re7 5.Rf3 Rh6+ 6.Kd5 Rh5+ 7.Kd4 Kb7 8.c6+ Kxc6 9.Rc3+ Kd6 10.Rf3 Rd5+ 11.Kc4 Re4+ 12.Kb3 Kc5 13.Rc3+ Kb5 14.Rh3 Red4 15.Kb2 Rd2+ 16.Kc3 Rd8 17.Rg3 c5 18.Re3 c4 19.Re5+ R8d5
 38	07:26	3,426,124,515	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 38	07:26	3,426,125,222	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 39	07:26	3,426,127,757	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 39	07:26	3,426,128,204	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 40	07:26	3,426,129,549	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 40	07:26	3,426,129,818	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 41	07:26	3,426,131,898	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 41	07:26	3,426,132,117	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 42	07:26	3,426,150,120	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 42	07:26	3,426,150,427	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 43	07:26	3,426,152,301	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 43	07:26	3,426,152,556	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 44	07:26	3,426,164,252	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 44	07:26	3,426,164,427	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 45	07:26	3,426,184,218	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 45	07:26	3,426,184,260	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 46	07:26	3,426,361,177	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 46	07:26	3,426,361,410	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 47	07:26	3,426,445,689	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 47	07:26	3,426,445,977	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 48	07:26	3,426,546,729	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 48	07:26	3,426,547,016	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 49	07:26	3,426,629,163	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 49	07:26	3,426,629,230	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 50	07:26	3,426,707,235	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 50	07:26	3,426,707,297	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 51	07:26	3,426,800,750	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 51	07:26	3,426,800,834	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 52	07:26	3,426,919,448	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 52	07:26	3,426,919,968	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 53	07:27	3,427,068,017	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 53	07:27	3,427,068,620	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 54	07:27	3,427,513,699	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 54	07:27	3,427,514,013	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 55	07:27	3,427,984,564	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 55	07:27	3,427,985,043	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 56	07:27	3,428,242,370	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 56	07:27	3,428,242,708	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 57	07:27	3,428,469,216	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 57	07:27	3,428,469,627	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 58	07:27	3,428,685,789	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 58	07:27	3,428,685,845	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 59	07:27	3,428,947,872	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 59	07:27	3,428,948,497	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 60	07:28	3,437,321,307	7,663,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 60	07:41	3,592,863,144	7,789,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 61	07:45	3,636,407,202	7,817,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 61	07:51	3,678,131,528	7,804,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
And the first is a TB lookup.
[d]8/8/8/2b4p/8/p5k1/3N4/7K w - - 0 1
Best for white is Ne4+, then taking the Bishop, but white can't stop both pawns.
In both positions you are incorrect Look at this video by the Author GM David Smerdon ==>
Do NOT worry and be happy, we all live a short life :roll:
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MOBMAT
Posts: 385
Joined: Sat Feb 04, 2017 11:57 pm
Location: USA

Re: Some top engines solve this instantly, but Humans ?

Post by MOBMAT »

Chessqueen wrote: ↑Sat Aug 08, 2020 12:57 am
MOBMAT wrote: ↑Fri Aug 07, 2020 6:53 pm [d]k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1
Looks like the best white can do is lose in 30.

Code: Select all

FEN: k7/2pr1p2/Kp3R1P/2Pr4/1P6/8/8/8 w - - 0 1

Houdini 6 (N6):
 13	00:00	 2,115,956	9,841,000	-4.18	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg2 Rxh7 6.Rg4 Rch8 7.Kb5 Rh6 8.Rd4 Rh4 9.Rxh4
 14	00:00	 3,217,411	10,117,000	-4.42	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg3 Rxh7 6.Kb5 Rh6 7.Ka4 Rxc6 8.Rh3 Rd6 9.Rh2 Rcd8 10.b5
 15	00:00	 6,653,860	9,813,000	-4.91	1.Kb5 bxc5 2.bxc5 Kb8 3.Kc4 Rh5 4.Kb5 Re7 5.Kc4 Kb7 6.Kd4 Kc8 7.Kc4 Kb8 8.Kb5
 16	00:00	 7,458,153	9,598,000	-4.86	1.Kb5 bxc5 2.bxc5 Kb8 3.Kc6 Kc8 4.Kb5 Rh5 5.Kb4 Re7 6.Kc4 Kd7 7.Kd4 Kd8 8.Kc4 Ke8 9.Kb5 Re6 10.Rf2
 17	00:01	 12,711,714	9,381,000	-5.49	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Kb8 4.Kb4 Rh4+ 5.Kb3 Rd3+ 6.Kc2 Rd5 7.c6 Rd6 8.Rf5 Rxc6+ 9.Kd1 Rd6+ 10.Ke2
 18	00:01	 17,612,462	9,687,000	-6.06	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rd8 8.Rg4 Rdh8 9.Rg2 Rh4 10.Re2 R4h5+ 11.Kc4 R8h6 12.Kd3 Rxc6 13.Re8+ Ka7 14.Ke3
 19	00:03	 36,508,458	11,144,000	-7.54	1.c6 Rd8 2.h7 Rh5 3.Rf4 Kb8 4.Re4 Rxh7 5.Kb5 Rh5+ 6.Kc4 b5+ 7.Kb3 Rd6 8.Re8+ Ka7 9.Re3 Rxc6 10.Rf3 Kb7 11.Re3 Rc4 12.Rf3 Rhh4 13.Kb2
 20-	00:04	 45,698,956	11,393,000	-9.85	1.c6 Rd8
 20+	00:04	 46,482,556	11,406,000	-8.86	1.h7
 20-	00:04	 46,704,212	11,405,000	-9.35	1.h7 Rh5
 20-	00:05	 62,455,073	10,985,000	-17.67	1.h7 Rh5
 20+	00:05	 63,731,467	10,990,000	-15.56	1.h7
 20+	00:05	 64,123,076	10,929,000	-11.59	1.h7
 20	00:06	 71,602,106	10,628,000	-81.48	1.h7 Rh5 2.Rf5 Rxh7 3.Re5 Rh8 4.Kb5 Rh6 5.Ka4 bxc5 6.Kb3 Rh3+ 7.Kc2 cxb4 8.Re2 b3+ 9.Kb2 Kb7 10.Rf2 Rd6 11.Kb1 Ra6 12.Rf1 b2 13.Kc2 Rc6+ 14.Kxb2
 20	00:06	 73,800,681	10,605,000	-81.48	1.h7 Rh5 2.Rf5 Rxh7 3.Re5 Rh8 4.Kb5 Rh6 5.Ka4 bxc5 6.Kb3 Rh3+ 7.Kc2 cxb4 8.Re2 b3+ 9.Kb2 Kb7 10.Rf2 Rd6 11.Kb1 Ra6 12.Rf1 b2 13.Kc2 Rc6+ 14.Kxb2
 21+	00:07	 74,446,469	10,621,000	-17.49	1.h7
 21	00:08	 86,626,237	9,760,000	-81.44	1.h7 Rh5 2.Rf3 bxc5 3.Kb5 Kb7 4.Ka4 Rxh7 5.Kb3 cxb4 6.Rg3 Rd6 7.Kc4 Rh4+ 8.Kb3 Ra6 9.Rg1 Rc6 10.Kb2 Rh2+ 11.Kb3 Rc3+ 12.Ka4
 21	00:09	 89,087,624	9,539,000	-81.44	1.h7 Rh5 2.Rf3 bxc5 3.Kb5 Kb7 4.Ka4 Rxh7 5.Kb3 cxb4 6.Rg3 Rd6 7.Kc4 Rh4+ 8.Kb3 Ra6 9.Rg1 Rc6 10.Kb2 Rh2+ 11.Kb3 Rc3+ 12.Ka4
 22+	00:12	 110,669,694	8,886,000	-80.57	1.h7
 22+	00:12	 110,695,070	8,884,000	-79.70	1.h7
 22+	00:12	 110,699,388	8,883,000	-77.95	1.h7
 22	00:12	 112,556,216	8,783,000	-82.72	1.h7 Rh5 2.c6 Rd3 3.h8R+ Rxh8 4.Rf5 Rhd8 5.Rg5 R3d4 6.Rg1 Kb8 7.Rh1 Rxb4 8.Rh2 Ra4+ 9.Kb5 Rad4 10.Ka6 R4d5 11.Ra2 Kc8 12.Ra3 Ra5+ 13.Rxa5 bxa5 14.Ka7
 22+	00:13	 114,872,203	8,680,000	-77.74	1.c6
 22+	00:14	 120,746,729	8,440,000	-63.78	1.c6
 22	00:14	 123,195,314	8,457,000	-82.64	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Rg7 R1h5+ 10.Kc4 R8h6 11.Rg8+ Ka7 12.Kd4 Rxc6 13.Ke4 Rh4+ 14.Kd3 Kb7 15.b5 Rc5 16.Ke3 Rxb5 17.Kd2
 22	00:14	 125,832,117	8,403,000	-82.64	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Rg7 R1h5+ 10.Kc4 R8h6 11.Rg8+ Ka7 12.Kd4 Rxc6 13.Ke4 Rh4+ 14.Kd3 Kb7 15.b5 Rc5 16.Ke3 Rxb5 17.Kd2
 23+	00:14	 125,856,645	8,402,000	-82.57	1.c6
 23+	00:14	 125,872,308	8,401,000	-82.50	1.c6
 23+	00:15	 126,130,676	8,390,000	-73.74	1.c6
 23	00:15	 128,058,781	8,337,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Ka6 R1h5 10.Rd4 R5h6 11.Rf4 Rd8 12.Kb5 Rh5+ 13.Kc4 Rd6 14.Rf8+ Ka7 15.Kc3
 23	00:15	 128,162,259	8,337,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg7 Rch8 8.Rg4 Rh1 9.Ka6 R1h5 10.Rd4 R5h6 11.Rf4 Rd8 12.Kb5 Rh5+ 13.Kc4 Rd6 14.Rf8+ Ka7 15.Kc3
 24+	00:15	 128,235,525	8,334,000	-82.65	1.c6
 24+	00:15	 128,323,858	8,330,000	-82.58	1.c6
 24+	00:15	 129,009,440	8,326,000	-23.18	1.c6
 24	00:15	 129,038,418	8,326,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 24	00:15	 129,038,915	8,326,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 25	00:15	 129,081,811	8,325,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4
 25	00:15	 129,082,139	8,325,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4
 26	00:15	 129,306,484	8,318,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 26	00:15	 129,364,771	8,318,000	-82.72	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rd1 Rch8 8.Rf1 Rh1 9.Rf6 R1h5+ 10.Kc4 R8h6 11.Rf8+ Ka7 12.b5 Rxc6+ 13.Kd3 Rxb5 14.Rf4 Rb3+ 15.Kd2
 27+	00:15	 131,575,227	8,293,000	-82.65	1.c6
 27	00:16	 137,605,498	8,331,000	-87.60	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg3 Rch8 8.Rf3 Rd8 9.Rf5 Rhd6 10.Rf1 Rd4 11.Ka6 Rh8 12.Kb5 Rhh4 13.Ka6 Rd8 14.Kb5
 27	00:17	 144,972,717	8,350,000	-87.60	1.c6 Rd8 2.Rxf7 Kb8 3.h7 Rh5 4.Rg7 Rc8 5.Rg1 Rxh7 6.Kb5 Rh6 7.Rg3 Rch8 8.Rf3 Rd8 9.Rf5 Rhd6 10.Rf1 Rd4 11.Ka6 Rh8 12.Kb5 Rhh4 13.Ka6 Rd8 14.Kb5
 28+	00:17	 148,391,045	8,312,000	-87.53	1.c6
 28+	00:17	 148,420,579	8,313,000	-87.46	1.c6
 28+	00:18	 152,984,152	8,308,000	-12.75	1.c6
 28	01:01	 299,016,594	4,896,000	-M55	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Rdd5 5.Ra2 Rh3 6.Ra1 Kb8 7.Ra2 Rxh7 8.Re2 Rh8 9.Re7 Rhd8 10.Re1 Rd4 11.Kb5 Rd3 12.Re5 R3d5+ 13.Rxd5 Rxd5+ 14.Kc4 Rd4+ 15.Kb3 Rxb4+ 16.Kc2 Rc4+ 17.Kd3
 28	01:14	 362,478,130	4,865,000	-M55	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Rdd5 5.Ra2 Rh3 6.Ra1 Kb8 7.Ra2 Rxh7 8.Re2 Rh8 9.Re7 Rhd8 10.Re1 Rd4 11.Kb5 Rd3 12.Re5 R3d5+ 13.Rxd5 Rxd5+ 14.Kc4 Rd4+ 15.Kb3 Rxb4+ 16.Kc2 Rc4+ 17.Kd3
 29+	01:19	 389,320,701	4,919,000	-M62	1.c6
 29+	01:19	 389,406,164	4,919,000	-M69	1.c6
 29+	01:19	 389,570,686	4,920,000	-97.81	1.c6
 29	01:19	 393,792,482	4,946,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Rf2 Rc3 12.Rf6 Ra3+ 13.Kxb5 Ka7 14.Rf5 Rah3 15.Rf6 Rb8+ 16.Kc5 Rh5+ 17.Kc4
 29	01:19	 396,760,485	4,962,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Rf2 Rc3 12.Rf6 Ra3+ 13.Kxb5 Ka7 14.Rf5 Rah3 15.Rf6 Rb8+ 16.Kc5 Rh5+ 17.Kc4
 30	01:20	 397,907,705	4,969,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Kxb5 R8h5+ 12.Ka4 Ka7 13.Rf8 Rh8 14.Rf5 R3h5 15.Rf1 Kb6 16.Kb3 Rh3+ 17.Kc4
 30	01:20	 400,521,288	4,981,000	-88.30	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Rf1 Rh3 11.Kxb5 R8h5+ 12.Ka4 Ka7 13.Rf8 Rh8 14.Rf5 R3h5 15.Rf1 Kb6 16.Kb3 Rh3+ 17.Kc4
 31	01:22	 423,757,958	5,119,000	-M58	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Re2 Ka8 11.Kxb5 Rh5+ 12.Kc4 Ka7 13.Kd4 Kb6 14.Re6 Rh4+ 15.Kd3 Rxb4 16.Ke3 Rh3+ 17.Kf2
 31	01:25	 437,933,449	5,137,000	-M58	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Re5 Rh8 9.Re1 R3xh7 10.Re2 Ka8 11.Kxb5 Rh5+ 12.Kc4 Ka7 13.Kd4 Kb6 14.Re6 Rh4+ 15.Kd3 Rxb4 16.Ke3 Rh3+ 17.Kf2
 32+	01:25	 440,048,241	5,139,000	-M65	1.c6
 32+	01:25	 440,083,779	5,139,000	-M72	1.c6
 32+	01:25	 440,195,522	5,140,000	-103.38	1.c6
 32	01:52	 592,753,504	5,273,000	-M51	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Rg7 Ka8 9.Kxb5 Ka7 10.Rf7 Rh5+ 11.Kc4 Rh8 12.Kd3 Kb6 13.Rf1 R8xh7 14.Rf8 Rh3+ 15.Ke2 Kxc6 16.Kf1 R7h4
 32	02:02	 669,056,510	5,454,000	-M51	1.c6 Rd8 2.Rxf7 Rc8 3.h7 Kb8 4.Rg7 Rh5 5.Rg8 b5 6.Rg7 Rh2 7.Rg5 Rh3 8.Rg7 Ka8 9.Kxb5 Ka7 10.Rf7 Rh5+ 11.Kc4 Rh8 12.Kd3 Kb6 13.Rf1 R8xh7 14.Rf8 Rh3+ 15.Ke2 Kxc6 16.Kf1 R7h4
 33	02:39	 936,447,757	5,888,000	-M35	1.c6 Rd8 2.Rf1 Rh5 3.h7 Rd3 4.Ra1 Kb8 5.Ra2 Rxh7 6.Rg2 Rh8 7.Re2 Rhd8 8.Re5 R3d4 9.Kb5 R4d5+ 10.Rxd5 Rxd5+ 11.Kc4 b5+ 12.Kc3 Rd2 13.Kb3 Rc2 14.Ka3 Rb2 15.Kxb2 Ka7 16.Kc3 Kb6 17.Kd4
 33	05:35	2,465,672,708	7,353,000	-M36	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rg2 Rh1 14.Kc3 Rd1 15.Rg5 Rc6+ 16.Kb2 Kb7 17.Ra5 Rd2+ 18.Kb3
 33	05:36	2,472,449,173	7,352,000	-M36	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rg2 Rh1 14.Kc3 Rd1 15.Rg5 Rc6+ 16.Kb2 Kb7 17.Ra5 Rd2+ 18.Kb3
 34	06:07	2,760,799,874	7,520,000	-M32	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rb5 Rh4+ 14.Kd3 Ra6 15.Rg5 Ra3+ 16.Kc2 Rh2+ 17.Kb1 Rf3 18.Rg8+ Kb7 19.Rg1 Rb3+ 20.Kc1 Rc3+ 21.Kb1 Rh5 22.Ka2 Rb5 23.Rf1
 34	06:07	2,765,147,720	7,523,000	-M32	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra2 Re6 9.c6 Rhxh6 10.Rb2+ Kxc6 11.Rc2+ Kb7 12.Rb2+ Kc8 13.Rb5 Rh4+ 14.Kd3 Ra6 15.Rg5 Ra3+ 16.Kc2 Rh2+ 17.Kb1 Rf3 18.Rg8+ Kb7 19.Rg1 Rb3+ 20.Kc1 Rc3+ 21.Kb1 Rh5 22.Ka2 Rb5 23.Rf1
 35	06:27	2,946,333,552	7,609,000	-M31	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Ra4 14.Kf2 Kc6 15.Rb3 Rxc5
 35	06:27	2,946,334,052	7,609,000	-M31	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Ra4 14.Kf2 Kc6 15.Rb3 Rxc5
 36	06:36	3,035,713,848	7,656,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 36	06:36	3,035,715,035	7,656,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 37	06:52	3,171,027,756	7,688,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 37	06:52	3,171,028,430	7,688,000	-M30	1.Kb5 bxc5 2.bxc5 Rh5 3.Kc4 Rdd5 4.Ra6+ Kb7 5.Ra5 Rde5 6.Kd4 Kc6 7.Ra6+ Kb5 8.Ra7 Re6 9.Rxc7 Rexh6 10.Rb7+ Kc6 11.Rb6+ Kc7 12.Rb5 Ra6 13.Ke3 Rh4 14.Kf3 Ra3+ 15.Kg2 Rc4 16.Rb2 Rxc5
 38	07:26	3,426,121,528	7,667,000	-M27	1.Kb5 bxc5 2.bxc5 Rh5 3.h7 Rxh7 4.Kc6 Re7 5.Rf3 Rh6+ 6.Kd5 Rh5+ 7.Kd4 Kb7 8.c6+ Kxc6 9.Rc3+ Kd6 10.Rf3 Rd5+ 11.Kc4 Re4+ 12.Kb3 Kc5 13.Rc3+ Kb5 14.Rh3 Red4 15.Kb2 Rd2+ 16.Kc3 Rd8 17.Rg3 c5 18.Re3 c4 19.Re5+ R8d5
 38	07:26	3,426,124,515	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 38	07:26	3,426,125,222	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 39	07:26	3,426,127,757	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 39	07:26	3,426,128,204	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 40	07:26	3,426,129,549	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 40	07:26	3,426,129,818	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 41	07:26	3,426,131,898	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 41	07:26	3,426,132,117	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 42	07:26	3,426,150,120	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 42	07:26	3,426,150,427	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 43	07:26	3,426,152,301	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 43	07:26	3,426,152,556	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 44	07:26	3,426,164,252	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 44	07:26	3,426,164,427	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 45	07:26	3,426,184,218	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 45	07:26	3,426,184,260	7,667,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 46	07:26	3,426,361,177	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 46	07:26	3,426,361,410	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 47	07:26	3,426,445,689	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 47	07:26	3,426,445,977	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 48	07:26	3,426,546,729	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 48	07:26	3,426,547,016	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 49	07:26	3,426,629,163	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 49	07:26	3,426,629,230	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 50	07:26	3,426,707,235	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 50	07:26	3,426,707,297	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 51	07:26	3,426,800,750	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 51	07:26	3,426,800,834	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 52	07:26	3,426,919,448	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 52	07:26	3,426,919,968	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 53	07:27	3,427,068,017	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 53	07:27	3,427,068,620	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 54	07:27	3,427,513,699	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 54	07:27	3,427,514,013	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 55	07:27	3,427,984,564	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 55	07:27	3,427,985,043	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 56	07:27	3,428,242,370	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 56	07:27	3,428,242,708	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 57	07:27	3,428,469,216	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 57	07:27	3,428,469,627	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 58	07:27	3,428,685,789	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 58	07:27	3,428,685,845	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 59	07:27	3,428,947,872	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 59	07:27	3,428,948,497	7,666,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 60	07:28	3,437,321,307	7,663,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 60	07:41	3,592,863,144	7,789,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 61	07:45	3,636,407,202	7,817,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
 61	07:51	3,678,131,528	7,804,000	-M30	1.c6 Rd8 2.Rxf7 Kb8 3.Rg7 Rh5 4.h7 Rc8 5.Rg8 b5 6.Rg7 Ka8 7.Rf7 Rh8 8.Rxc7 R5xh7 9.Rxh7 Rxh7
And the first is a TB lookup.
[d]8/8/8/2b4p/8/p5k1/3N4/7K w - - 0 1
Best for white is Ne4+, then taking the Bishop, but white can't stop both pawns.
In both positions you are incorrect Look at this video by the Author GM David Smerdon ==>
the databases don't make mistakes. The entire premise is that the opponent would just casually make the wrong is what is wrong. After Tal played Nb3 rather than Ne4+, any GM would see that if he pushed the a-pawn it would be stalemate. The correct response to Nb3 is to move Be3. Granted, against a very weak player, they might all into the trap, but the GM they were playing against would have crushed them anyways. What is the point? The point is, you can't trap engines! LOL
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Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
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Karlo Bala
Posts: 373
Joined: Wed Mar 22, 2006 10:17 am
Location: Novi Sad, Serbia
Full name: Karlo Balla

Re: Some top engines solve this instantly, but Humans ?

Post by Karlo Bala »

MOBMAT wrote: ↑Sat Aug 08, 2020 3:11 am
the databases don't make mistakes. The entire premise is that the opponent would just casually make the wrong is what is wrong. After Tal played Nb3 rather than Ne4+, any GM would see that if he pushed the a-pawn it would be stalemate. The correct response to Nb3 is to move Be3. Granted, against a very weak player, they might all into the trap, but the GM they were playing against would have crushed them anyways. What is the point? The point is, you can't trap engines! LOL
As a matter of fact, the position is rather easy for the average chess player. The "human" way would be to just move the bishop for example to a7, and play Kf2, Ke2, and so on. Black is winning even without the pawn on h5.
Best Regards,
Karlo Balla Jr.
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Karlo Bala
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Full name: Karlo Balla

Re: Some top engines solve this instantly, but Humans ?

Post by Karlo Bala »

Chessqueen wrote: ↑Sat Aug 08, 2020 12:57 am In both positions you are incorrect Look at this video by the Author GM David Smerdon ==>
You are missing the point of the video...

The position is simply lost for white. The point of the video is how to confuse the opponent and provoke to make an error (1...a2??).
Best Regards,
Karlo Balla Jr.
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Chessqueen
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Re: Some top engines solve this instantly, but humans?

Post by Chessqueen »

Ajedrecista wrote: ↑Fri Aug 07, 2020 7:31 pm Hello:

I got the key ideas on the second position, trying to stalemate the white king with c6 and b5 while getting rid of the white rook and the h-pawn. Nice indeed!

I searched the first position. The original post and the key word is swindle: black is winning (white is lost in 19 moves according to Shredder online EGTB) but in this case rushing the a-pawn builds a draw by stalemate or a standard draw, so a2 is an 'avoid move' at some moment. The intended solutions are here:

Jammo's Chess Puzzle #51

1. Nb3 a2? 2. Nc1! a1=Q (½-½) Draw by stalemate.
1. Nb3 a2? 2. Nc1! a1=R (½-½) Draw by stalemate.
1. Nb3 a2? 2. Nc1! a1=B (½-½) Draw.
1. Nb3 a2? 2. Nc1! a1=N 3. Nb3! (½-½) Draw.

I have followed a kind of 'chess notation approach' according to 'chess annotation symbols' article at Wikipedia: '?' for a move that converts a win into a draw, a draw into a lose or a win into a lose; and '!' for the only legal move that does not worsen the result of the playing side (only move that wins on a won position or only move that draws in a drawn position).

The web wrongly quotes the game Firmian - Smejkal, Tallinn 1971. According to ChessGames, white side was not Nick de Firmian but Semyon Abramovich Furman, so Furman - Smejkal, Tallinn 1971:

Semyon Abramovich Furman vs Jan Smejkal, Tallinn (1971)

[pgn]
[Event "Tallinn"]
[Site "Tallinn EST"]
[Date "1971.02.26"]
[EventDate "?"]
[Round "5"]
[Result "0-1"]
[White "Semyon Abramovich Furman"]
[Black "Jan Smejkal"]
[ECO "D76"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "188"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 O-O 7.O-O
Nb6 8.Nc3 Nc6 9.e3 Re8 10.Nd2 e5 11.d5 Ne7 12.e4 c6 13.Nb3
cxd5 14.exd5 Nf5 15.Nc5 Nd6 16.b3 e4 17.Bd2 f5 18.Rc1 Nf7
19.Re1 Nxd5 20.Nxd5 Qxd5 21.f3 b6 22.Na4 Bb7 23.fxe4 Qd4+
24.Be3 Qxd1 25.Rexd1 Bxe4 26.Bxe4 Rxe4 27.Bf2 Re7 28.Nc3 Ne5
29.h3 Rae8 30.Kf1 Nf3 31.Nd5 Re2 32.Nc7 R8e7 33.Rd8+ Kf7
34.Nd5 Nd2+ 35.Kg1 Nf3+ 36.Kf1 Nd2+ 37.Kg1 Bb2 38.Rd1 Re8
39.Rxe8 Kxe8 40.Nf4 Nf3+ 41.Kg2 Rd2 42.Rxd2 Nxd2 43.g4 Kd7
44.gxf5 gxf5 45.Nd3 Bc3 46.Be3 Kd6 47.Kf2 Ne4+ 48.Kf3 Bf6
49.Bf4+ Kd7 50.Bb8 a5 51.Be5 Bd8 52.Ke3 Ng5 53.Nf4 Ne6 54.Nh5
Bg5+ 55.Kf3 Kc6 56.Ng3 Kd5 57.Bb2 Nd4+ 58.Bxd4 Kxd4 59.Nxf5+
Kc3 60.Ke4 Kb2 61.Kd3 Kxa2 62.Kc2 Ka3 63.Nd4 Kb4 64.Ne6 Be7
65.Nf4 Kc5 66.Kd3 Bf6 67.Ng2 Kb4 68.Kc2 Kc5 69.Kd3 b5 70.Ne3
Bg5 71.Nc2 Bf6 72.Ne3 Bb2 73.Kc2 Bd4 74.Nf1 Bf6 75.Nd2 Kd4
76.Nb1 Be5 77.Nc3 Kc5 78.Ne4+ Kd5 79.Ng5 h6 80.Nf3 Ke4 81.Nd2+
Kf4 82.Kd3 Kg3 83.h4 h5 84.Ke2 a4 85.bxa4 bxa4 86.Nc4 Bf6
87.Kf1 Bxh4 88.Kg1 Be7 89.Kh1 Bc5 90.Nd2 a3 91.Ne4+ Kf3
92.Nxc5 a2 93.Nb3 Ke4 94.Kg2 Kd5 0-1
[/pgn]

White to move just after black's 90th move.

Regards from Spain.

Ajedrecista.
Yes you are correct as far as the players name, and Furman resigned and for most of the spectator, the final was rather dull. except for Mikhail Tal who was watching and calculating oh his head what would have been the best response for Furman. Tal approached the board after the game's that you posted here and asked S. " Smejkal, " What would you have done after 91. Nb3?! instead of the actual move 91. Ne4+ ?? Tal Knew what would have been the best response to 91. Nb3! which is NOT 92. a2?? but Tal who knew that most humans are impatience, and in certain position when you play an unusual response and NOT the obvious, they will play NOT the best move due to fear factor and nerve, and finally their need to stay in control. So when Smejkal responded Why pawn to a2 of course, then Tal knowing that that was NOT the best response said to Smejkal Ah with a twinkle in his Eye. "Then you would would only have drawn." Remember that these were two human GMs playing NOT computer. And some people here immediately grab their computer and even used endgame TB to prove that 92. a2 was NOT the best response,keep in mind that TAl a former Wworld Champion knew at the moment that he asked the question which was the best response.

PS: I also stated here on the title that Some Top Engines solves this instantly, but Humans ? meaning not all humans. Also before I posted the 2nd position I clearly wrote this which some of you missed it altogether " So to write databases TB do not make mistake is silly. A Rook down how can you save from losing this game, remember playing versus human even GM, it might NOT work against top engines." Meaning it is NOT meant for computer to find the best moves since back then Computer were too weak and the point is that humans under pressure blunder even GMs. Therefore, please stop using computer and TB is the position and the poster specifically write down or imply that it is NOT for computer to solve it. I guarantee that if you ask 10 GMs what would they do after 91.Nb3! they will take a few second and respond that same way, well I will simply push my pawn to 92. a2?? and promote. But these are the consequences :roll:

1. Nb3 a2? 2. Nc1! a1=Q (½-½) Draw by stalemate.
1. Nb3 a2? 2. Nc1! a1=R (½-½) Draw by stalemate.
1. Nb3 a2? 2. Nc1! a1=B (½-½) Draw.
1. Nb3 a2? 2. Nc1! a1=N 3. Nb3! (½-½) Draw.
Do NOT worry and be happy, we all live a short life :roll:
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