stockfish's positional understanding better than 2700

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Uri Blass
Posts: 8556
Joined: Wed Mar 08, 2006 11:37 pm
Location: Tel-Aviv Israel

stockfish's positional understanding better than 2700

Post by Uri Blass » Sat Jan 26, 2019 4:58 pm



In this drawn position black who has more than 2700 resigned.

Stockfish without tablebases can see thanks to positional knowledge that white is not winning.

GM Shankland Samuel L has a rating of more than 2700 but his positional knowledge is weaker than stockfish(at least in this position) so he did not understand that it is a draw and resigned.

Edit:Note that I did not use tablebases for stockfish.

Stockfish does not see 0.00 but score near +1 is certainly not a winning score.

Werewolf
Posts: 1191
Joined: Thu Sep 18, 2008 8:24 pm

Re: stockfish's positional understanding better than 2700

Post by Werewolf » Sat Jan 26, 2019 6:36 pm

There are probably other 2700 people who wouldn’t resign here.

Spliffjiffer
Posts: 191
Joined: Thu Aug 02, 2012 5:48 pm
Location: Germany

Re: stockfish's positional understanding better than 2700

Post by Spliffjiffer » Sat Jan 26, 2019 9:24 pm

its a long tournament near the end, people get exausted and Sam was disappointed by his blunder before...when things accumulate humans make mistakes easier...if he would have been fresh im sure he had not resigned and saw the draw !!?
Wahrheiten sind Illusionen von denen wir aber vergessen haben dass sie welche sind.

carldaman
Posts: 1708
Joined: Sat Jun 02, 2012 12:13 am

Re: stockfish's positional understanding better than 2700

Post by carldaman » Sat Jan 26, 2019 9:43 pm

Spliffjiffer wrote:
Sat Jan 26, 2019 9:24 pm
its a long tournament near the end, people get exausted and Sam was disappointed by his blunder before...when things accumulate humans make mistakes easier...if he would have been fresh im sure he had not resigned and saw the draw !!?
That's part of what makes a 2700 player what he is. Otherwise, he'd be a ...2800 player. ;-0

MikeB
Posts: 3391
Joined: Thu Mar 09, 2006 5:34 am
Location: Pen Argyl, Pennsylvania

Re: stockfish's positional understanding better than 2700

Post by MikeB » Sun Jan 27, 2019 12:19 am

Uri Blass wrote:
Sat Jan 26, 2019 4:58 pm


In this drawn position black who has more than 2700 resigned.

Stockfish without tablebases can see thanks to positional knowledge that white is not winning.

GM Shankland Samuel L has a rating of more than 2700 but his positional knowledge is weaker than stockfish(at least in this position) so he did not understand that it is a draw and resigned.

Edit:Note that I did not use tablebases for stockfish.

Stockfish does not see 0.00 but score near +1 is certainly not a winning score.
It's an understandable mistake - not one usually made by a GM however. The knight is loss for sure , but black has the safety of the a8 and b8 squares to shuffle his K back and forth, hence white will not to be able to promote one of its pawn. What does SF think of this position w/o EGTB - it's a known win for white ( under current ICCF rules).


https://syzygy-tables.info/?fen=3k4/2n5 ... _w_-_-_0_1

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 51	+100.00 	343.0M	0:11.68	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Be4 Nh6 Kc4 Ng4 Bd5 Nf6 Kc5 Ng4 Kd6 Nf6 Bf3 Ng8 Kc5 Nf6 Kd4 Nd7 Bg4 Nf6 Be6 Kb7 Ke5 Kc6 Bc4 Nd5 b5+ Kc5 Bxd5 Kxb5 Kf5 Kxa5 Be4 Kb6 
 50	+100.00 	315.5M	0:10.77	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Be4 Ne7 Bd3 Kb7 Bc4 Ng6 Bd5+ Ka7 Bf3 Ne5 Be4 Ng4 Bd3 Kb7 Bc4 Nf6 Kd4 Nd7 Be6 Nf6 Ke5 Kc6 Bc4 Nd5 b5+ Kc5 Bxd5 Kxb5 Kf5 Kxa5 Be4 Kb6 
 49	+100.00 	308.1M	0:10.51	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Be4 Ne7 Bd3 Kb7 Bc4 Ng6 Bd5+ Ka7 Bf3 Ne5 Be4 Ng4 Kc4 Nh6 Kd4 Ng8 Bd5 Nf6 Be6 Kb7 Ke5 Kc6 Bc4 Nd5 Bxd5+ Kb5 Kd4 Kxb4 Bc6 Kxa5 Ke5 Kb6 
 48	+100.00 	280.2M	0:09.65	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Be4 Ne7 Bd3 Kb7 Kd6 Ng8 Ke6 Nh6 Kd5 Ng4 Be2 Nf6+ Kd4 Nh7 Bd3 Nf6 Bc4 Nd7 Be6 Nf6 Ke5 Kc6 Bc4 Nd5 Bxd5+ Kb5 Kd6 Kxb4 Kc6 Kxa5 Bb3 Kb4 
 47	+100.00 	268.3M	0:09.30	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Be4 Ne7 Bd3 Kb7 Kd6 Ng8 Ke6 Nh6 Be4+ Ka7 Bd5 Ng4 Kd6 Nf6 Ke5 Ng4+ Kd4 Nf6 Bf3 Nd7 Bg2 Nf6 Bd5 Nh7 Ke5 Nf8 Be4 Nd7+ Ke6 Nb6 axb6+ Kxb6 Kd5 Kb5 
 46	+100.00 	252.0M	0:08.83	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Be4 Ne7 Bd3 Nc8 Bg6 Kb7 Be4+ Kc7 Bf5 Ne7 Bd3 Kb7 Kc4 Kc6 Kd4 Nd5 b5+ axb5 Be4 Kb7 Kxd5 Ka6 Bc2 Kxa5 Kc5 b4 Bb3 Ka6 Kc6 Ka5 
 45	+100.00 	219.4M	0:07.85	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Be4 Ne7 Bd3 Nc8 Bg6 Kb7 Be4+ Kc7 Bd5 Ne7 Bf3 Nc8 Be2 Kb7 Bg4 Ne7 Kd6 Ng8 Be6 Nf6 Ke5 Kc6 Bc4 Nd5 Bxd5+ Kb5 Kf5 Ka4 Bc4 Kxb4 Bd5 
 44	+100.00 	216.6M	0:07.77	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng2 Ke5 Ne3 Kd4 Nf5+ Kc5 Ka7 Bc4 Ng7 Kd4 Kb7 Bd3 Ka7 Kd5 Kb7 Be4 Nh5 Kc4+ Kc7 Kc5 Nf4 b5 axb5 a6 Ne6+ Kxb5 Nd4+ Kc4 Kb6 Kxd4 Kxa6 Kc5 Ka5 Bf5 Ka6 
 43	+100.00 	159.9M	0:05.74	Kb2 
 42	+100.00 	118.2M	0:04.22	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng6 Kf5 Ne7+ Ke6 Ng6 Be4 Nf4+ Kf5 Ne2 Bd3 Nd4+ Ke5 Nf3+ Kd5 Kb7 Bc4 Ng5 Bf1 Ka7 Bg2 Nf7 Kc5 Ng5 Bd5 Nh7 Kd4 Ng5 Be4 Nxe4 Kxe4 Kb7 Kd5 Kc7 Kc5 Kb7 Kd6 
 41	+100.00 	99.3M  	0:03.52	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng6 Kf5 Ne7+ Ke6 Ng6 Be4 Nf4+ Ke5 Nh3 Bd5 Kc7 Bc4 Kb7 Kf6 Nf4 Kf5 Nh5 Bd3 Ka7 Ke5 Kb7 Be2 Ng7 Kf6 Ne8+ Ke7 Ng7 Bg4 Kc6 Kf8 Kb5 Kxg7 Kxb4 
 40	+100.00 	86.9M  	0:03.08	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Ne2+ Kd3 Nf4+ Ke4 Ng6 Kf5 Ne7+ Ke6 Ng6 Be4 Nf4+ Ke5 Nh3 Bd3 Kb7 Kf5 Nf2 Be2 Ka7 Kf4 Nh3+ Kg4 Nf2+ Kf3 Nh3 Bc4 Ng5+ Ke3 Nh7 Kf4 Nf6 Kf5 Nd7 Be6 Nb8 Bd5 Nd7 Be4 Nb6 axb6+ Kxb6 Ke6 Kb5 Kd6 a 
 39	+100.00 	63.0M  	0:02.21	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd4+ Kc3 Nf5 Be4 Ng7 Kc4 Ne6 Bd5 Nf4 Kd4 Ka7 Kc5 Nd3+ Kc4 Nf2 Kc3 Nd1+ Kd4 Nf2 Bc4 Nd1 Bd3 Kb7 Be4+ Kc7 Bf3 Nf2 Kc4 Nh3 b5 axb5+ Kxb5 Ng1 Bd5 Ne2 Kc5 Nf4 
 38	+100.00 	58.9M  	0:02.06	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bc4 Nc7 Bd3 Ka7 Kc3 Nd5+ Kc4 Ne7 Kc5 Ng8 Bc4 Nf6 Bd5 Ng4 Kd4 Nh2 Ke4 Ng4 Bc4 Kb7 Kd4 Nf6 Bd5+ Kc7 Be6 Kb7 Ke5 Kc6 Bc4 Nd5 Bxd5+ Kb5 Kf4 Kxb4 Ke3 Kxa5 
 37	+100.00 	56.3M  	0:01.97	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bc4 Nc7 Bd3 Ka7 Kc3 Nd5+ Kc4 Ne3+ Kd4 Ng4 Bf5 Nf6 Ke5 Ng8 Be4 Nh6 Bd5 Ng4+ Kd4 Kb8 Be6 Nf2 Bc4 Kb7 Bd5+ Kc7 Bf3 Nh3 Kc4 Nf4 b5 axb5+ Kxb5 Ne6 Bd5 Nf8 a6 Kb8 
 36	+100.00 	38.2M  	0:01.32	Kb2 Kd7 Bc4 Kc6 Kb3 Kb7 Kc3 Kc6 Be2 Kb7 Kd4 Ne6+ Ke5 Nd8 Kd5 Nf7 Bc4 Ka7 Kd4 Nh8 Bd5 Ng6 Kd3 Ne5+ Kc3 Ng4 Kd4 Nh2 Be4 Ng4 Bf5 Nf6 Be6 Kb7 Ke5 Kc6 Kxf6 Kb5 Bd5 
 35	+100.00 	33.7M  	0:01.16	Kb2 Kc8 Kc3 Kb7 Bc4 Kc6 Be2 Kb7 Bf3+ Kb8 Kd4 Ne6+ Ke5 Nd8 Kd5 Nf7 Bh5 Nh6 Be2 Ka7 Bc4 Nf5 Bd3 Ne3+ Kd4 Ng4 Bc4 Kb7 Be2 Nh6 Bf3+ Kb8 b5 axb5 Kc5 Nf7 
 34	+100.00 	27.3M  	0:00.92	Kb2 Kd7 Bc4 Kc6 Kb3 Kb7 Bf7 Nb5 Bd5+ Ka7 Kc4 Nd6+ Kd4 Nf5+ Ke5 Ne3 Be4 Ng4+ Kd4 Nh6 Bd3 Kb7 Kc5 Nf7 Be4+ Ka7 Bd5 Ne5 Kd4 Ng4 Bc4 Kb7 Be6 Nf2 Ke3 Kc6 Kxf2 Kb5 Kg2 Kxb4 Bc8 
 33	+100.00 	24.3M  	0:00.81	Kb2 Kd7 Bc4 Kc6 Kb3 Kb7 Bf7 Nb5 Bd5+ Ka7 Kc4 Nd6+ Kd4 Nf5+ Ke5 Ne3 Be4 Ng4+ Kf4 Nf6 Kf5 Ng8 Ke5 Nh6 Bd5 Ng4+ Kf4 Nf6 Be6 Kb7 Ke5 Kc6 Kxf6 Kb5 Bd5 Kxb4 
 32	+100.00 	22.5M  	0:00.74	Kb2 Kd7 Bc4 Kc8 Kb3 Kb7 Kc3 Kc6 Be2 Kb7 Bf3+ Ka7 Kd4 Ne6+ Ke5 Ng5 Bd5 Nh3 Bc4 Nf2 Kd4 Kb7 Be2 Nh3 Ke3 Ng5 Bc4 Nh3 Bd5+ Kc7 Kf3 Kb8 Kg3 Ng5 Kg4 Nh7 
 31	+100.00 	21.6M  	0:00.71	Kb2 Kd7 Bc4 Kc6 Kb3 Kb7 Kc3 Kc6 Be2 Kb7 Bf3+ Ka7 Kd4 Ne6+ Ke5 Ng5 Bd5 Nh3 Bc4 Kb7 Kf5 Ka7 Ke4 Nf2+ Ke3 Nd1+ Kd4 Nf2 Be2 Nh3 Ke3 Ng5 Bc4 
 30	+100.00 	20.5M  	0:00.67	Kb2 Kd7 Bc4 Kc6 Kb3 Kb7 Bf7 Nb5 Bd5+ Ka7 Kc4 Nd6+ Kd4 Nf5+ Kc5 Ne3 Bf3 Nf5 Be4 Nh6 Kd4 Kb8 Bd5 Nf5+ Kc5 Ka7 Be6 Ne3 Kd4 Nc2+ Kc3 Ne3 
 29	+100.00 	9.27M  	0:00.27	Kb2 Kc8 Bf7 Nb5 Bc4 Nc7 Kc3 Kb7 Kd3 Kc6 Kc2 Kb7 Kc3 Kc6 Bf1 Kb7 Kc4 Ne8 Kd4 Nf6 Be2 Nh7 Bf3+ Kb8 Ke5 Ng5 Bd5 Nh7 Kf4 Nf6 
 28	+100.00 	8.07M  	0:00.23	Kb2 Kc8 Bf7 Nb5 Bc4 Nc7 Kc3 Kb7 Kd3 Kc6 Kc2 Kb7 Kc3 Kc6 Bf1 Kb7 Bg2+ Kb8 Bf3 Ka7 Be4 Ne6 Bd5 Nf4 Kd4 Kb8 Ke4 Nxd5 Kxd5 
 27	+100.00 	7.99M  	0:00.23	Kb2 Kc8 Bf7 Kb8 Bc4 Ka7 Kc3 Kb7 Kd3 Ne8 Kd4 Nf6 Bd3 Nd7 Be4+ Kc7 Bf5 Kc6 Bxd7+ Kxd7 Kd5 Kc7 Kc5 Kb7 Kd6 Kb8 Kc6 
 26	+100.00 	6.97M  	0:00.20	Kb2 Kc8 Bc4 Kb8 Kb3 Ka7 Kc3 Kb7 Kd3 Kc6 Kc2 Kb7 Kc3 Ne8 Bd5+ Ka7 Kc4 Nf6 Kd4 Kb8 Bf3 Kc7 Be2 Kb7 Ke5 Nd7+ Kd6 Nf6 Bf3+ Ka7 Ke5 Nd7+ Ke6 
 25	+100.00 	5.71M  	0:00.16	Kb2 Kc8 Bc4 Kb7 Kc3 Ne8 Kd4 Nf6 Bd3 Ka7 Be4 Kb8 Bg2 Ka7 Kc5 Ng4 Be4 Nf2 Kd4 Kb8 Bf3 Kc7 Be2 Kb7 Ke3 
 24	+100.00 	2.38M  	0:00.07	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd6 Kc3 Ne8 Kc4 Nf6 Kd4 Ng4 Bf3 Nf2 Ke3 Nh3 Bg2 Ng5 Kd4 Ka7 Kd5 
 23	+100.00 	1.93M  	0:00.06	Kb2 Kc8 Bf7 Kb8 Kb3 Nb5 Bd5 Nd6 Kc3 Ne8 Kd4 Nf6 Bc4 Kb7 Be6 Kc7 Bf5 Kc6 Kc4 Kc7 Bd3 Kb7 Kc5 Ng4 Be4+ Ka7 
 22	+100.00 	1.27M  	0:00.04	Kb2 Kc8 Bf7 Nb5 Bc4 Nc7 Kb3 Kb8 Bf7 Nb5 Bd5 Nd6 Kc3 Ne8 Bc4 Kb7 Kd4 Nf6 Bd3 Ng4 Be4+ Kb8 Bf5 Nf2 Kc4 Kb7 Kc5 Ka7 
 21	+100.00 	945809	0:00.03	Kb2 Kc8 Kc3 Kb7 Bc4 Kc6 Kb3 Nb5 Bd3 Nd4+ Kc3 Nb5+ Kb2 Kb7 Bxb5 axb5 Kc3 Kc7 Kd4 Kc6 Ke5 Kc7 Kd5 
 20	+100.00 	882402	0:00.03	Kb2 Kc8 Kc3 Kb7 Bc4 Kc6 Bd3 Kb7 Be4+ Kb8 Kc4 Ne6 Kd5 Ng5 Bd3 Kb7 Bc4 Nh3 Ke4 Nf2+ Kd4 Nh3 
 19	+100.00 	742401	0:00.03	Kb2 Kc8 Kc3 Kb7 Bc4 Kc6 Bd3 Kb7 Be4+ Kb8 Kd4 Ne6+ Ke5 Ng5 Bd5 Nh3 Be6 Ng5 Bc4 Kb7 Kd5 
 18	+100.00 	691298	0:00.03	Kb2 Kc8 Kc3 Kb7 Bc4 Kc6 Bd3 Kb7 Be4+ Kb8 Kd4 Ne6+ Ke5 Ng5 Bd3 Kb7 Bc4 Nh3 Ke4 Nf2+ Kd4 Nd1 
 17	+100.00 	432748	0:00.02	Kb2 Kd7 Bb1 Kc8 Kb3 Kb7 Be4+ Ka7 Kc3 Kb8 Bd3 Kb7 Bc4 Ne8 Kd4 Nd6 Bd3 
 16	+100.00 	415542	0:00.02	Kb2 Kd7 Bb1 Kc8 Kb3 Kb7 Be4+ Ka7 Kc3 Ne6 Kc4 Kb8 Kd5 Ng5 Bd3 Kb7 Kd6 
 15	+100.00 	396835	0:00.02	Kb2 Kd7 Bc4 Kc6 Kb3 Kb7 Kc3 Ne8 Bd3 Nc7 Be4+ Kb8 Kd4 Ne6+ Kd5 Ng5 Bd3 
 14	+100.00 	277422	0:00.02	Kb2 Kd7 Bc4 Kc6 Kb3 Kb7 Bd3 Ne6 Kc4 Kc7 Kc3 Kb7 Be4+ Kb8 
 13	+100.00 	134919	0:00.01	Kb2 Kc8 Bf7 Nb5 Bg6 Kc7 Bd3 Kb8 Kb3 Kb7 Kc4 Nd6+ Kd4 Nf7 Kc5 
 12	+100.00 	124157	0:00.01	Kb2 Kc8 Bf7 Nb5 Bg6 Kc7 Bd3 Kb7 Kb3 Nd6 Kc3 Nf7 Kd4 
 11	+100.00 	92756  	0:00.01	Kb2 Kc8 Bc4 Kb7 Bd3 Nb5 Kb3 Nd6 Kc3 Nb5+ Kc4 
 10	+100.00 	52034  	0:00.01	Kb2 Kc8 Bc4 Kb7 Bd3 Nb5 Bxb5 axb5 Kc3 Kc7 
  9	+100.00 	39194  	0:00.01	Kb2 Kc8 Bc4 Kb7 Bd3 Nb5 Bxb5 axb5 
  8	+100.00 	27123  	0:00.01	Kb2 Kd7 Kb3 Nb5 Bb1 Kc7 Bd3 
  7	+100.00 	20021  	0:00.01	Kb2 Kc8 Bb1 Nb5 Bd3 
  6	+100.00 	12507  	0:00.01	Kb2 Kd7 Bc4 Kc6 Kc3 Nd5+ Bxd5+ Kxd5 
  5	+100.00 	4950    	0:00.01	Kb2 Kd7 Bb3 Kd6 Bc4 
  4	+100.00 	2641    	0:00.01	Kb2 Kc8 Bc4 Kb7 
  3	+100.00 	1058    	0:00.01	Kb2 Nb5 Bc4 
  2	+100.00 	300      	0:00.01	Kb2 Nb5 
  1	+100.00 	62        	0:00.01	Kb2 
  1	Found 1511 tablebases 
  0	# 

Jouni
Posts: 1979
Joined: Wed Mar 08, 2006 7:15 pm

Re: stockfish's positional understanding better than 2700

Post by Jouni » Mon Jan 28, 2019 7:57 am

No wonder if GM blunders. Analysis by Komodo 12.3 WITH syzygy:

1. try
...
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kg5 Kc8 49.Be1 Kd8 50.Kf5 Kc8 51.Bf2 Kb8 52.Kg4 Kc8 53.Kf4 Kd8 54.Kf5 Kc8 55.Bc5 Kb8 56.Bg1 Ka8 57.Kg4 Kb8 58.Bd4 Kc8 59.Kg5 Kb8 60.Bg1 Kc8 61.Kf5 Kd8 62.Bc5 Kc8 63.Kg5 Kd8 64.Bf2 Kc8
+- (250.00) Depth: 39 00:00:02 41879kN, tb=42923
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kg5 Ke6 49.Kg4 Kd7 50.Kf5 Kc8 51.Bg3 Kd7 52.Be1 Kc8 53.Kg4 Kd7 54.Bf2 Kc8 55.Kf5 Kb8 56.Bc5 Kc8 57.Bg1 Kd8 58.Kg5 Kc8 59.Bf2 Kd7 60.Bd4 Kc8 61.Kg4 Kd7 62.Bg1 Kc8 63.Bc5 Kd7 64.Bd4 Kc8
+- (250.00) Depth: 40 00:00:02 43612kN, tb=45825
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf6 Kc8 49.Bg3 Kd7 50.Be1 Kd8 51.Kf5 Kd7 52.Bh4 Kc8 53.Kg4 Kd7 54.Kg5 Ke7 55.Bf2 Ke6 56.Be1 Kd7 57.Kf5 Kc8 58.Bf2 Kd7 59.Kg4 Kc8 60.Bc5 Kd7 61.Bd4 Kc8 62.Bf2 Kd7 63.Kf5 Kc8 64.Bg3 Kd7 65.Kf6 Kd8
+- (250.00) Depth: 41 00:00:03 47209kN, tb=49367
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf4 Kc8 49.Kg4 Kd7 50.Bg3 Ke7 51.Kf5 Kd7 52.Kf6 Kd8 53.Bf2 Kc8 54.Kg5 Kd7 55.Kf5 Kc8 56.Ke6 Kb8 57.Bh4 Kc8 58.Kd6 Kb8 59.Ke5 Kc8 60.Bf2 Kd7 61.Bg3 Ke7 62.Bh4+ Kd7 63.Kf5 Kc8 64.Kf4 Kd7 65.Bg3 Ke6 66.Kg5 Kd7
+- (250.00) Depth: 42 00:00:03 49823kN, tb=53431
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf4 Ke8 49.Kg4 Kd7 50.Kf5 Kc8 51.Bf2 Kd7 52.Bc5 Kc8 53.Kf6 Kb8 54.Be3 Kc8 55.Bf2 Kd8 56.Bh4 Kc8 57.Kg5 Kd7 58.Bg3 Kc6 59.Bf2 Kd7 60.Kf5 Kc8 61.Bc5 Kb8 62.Kg4 Kc8 63.Be3 Kd7 64.Kf5 Kc8 65.Bf4 Kd7 66.Kg5 Ke6
+- (250.00) Depth: 43 00:00:03 55201kN, tb=59111
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Bg3 Kc8 49.Kg4 Kd7 50.Bh4 Ke6 51.Kf4 Kd7 52.Bg3 Kc8 53.Kg5 Kd7 54.Bf2 Ke6 55.Bh4 Kd7 56.Kf6 Kc8 57.Bf2 Kd7 58.Bg3 Kd8 59.Ke6 Kc8 60.Ke5 Kd7 61.Bh4 Kc8 62.Kd6 Kb8 63.Bf2 Kc8 64.Bg3 Kd8 65.Bh4+ Kc8 66.Ke5 Kd7 67.Kf4 Ke6
+- (250.00) Depth: 44 00:00:03 57639kN, tb=63646
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf4 Ke6 49.Bg3 Kd7 50.Kg4 Kc8 51.Kg5 Kd7 52.Kf4 Kc8 53.Kf5 Kd7 54.Bh2 Kc8 55.Bd6 Kd7 56.Bg3 Kc8 57.Kg4 Kd7 58.Bh4 Ke6 59.Bf2 Kd7 60.Kf5 Kc8 61.Ke6 Kb8 62.Bg3+ Kc8 63.Bd6 Kd8 64.Bc5 Kc8 65.Ke7 Kb8 66.Kd7 Ka8 67.Ke6 Kb8
+- (250.00) Depth: 45 00:00:03 61172kN, tb=69062
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf4 Ke6 49.Bg3 Kf6 50.Kg4 Ke7 51.Bf2 Kf6 52.Kf4 Ke7 53.Kf5 Kd7 54.Kg4 Kc8 55.Bh4 Kd7 56.Kf5 Kc8 57.Kg5 Kd7 58.Kg4 Ke6 59.Kf4 Kd7 60.Bg5 Kc8 61.Kg4 Kd7 62.Be3 Ke6 63.Kf4 Kf6 64.Bd4+ Ke6 65.Bc5 Kd7 66.Kg4 Ke6 67.Kg5 Ke5 68.Bf2 Ke6
+- (250.00) Depth: 46 00:00:04 81852kN, tb=123893
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Bf2 Kc8 49.Ke6 Kb8 50.Bg3+ Kc8 51.Kf5 Kd7 52.Bh4 Kd6 53.Bf2 Kd7 54.Bg3 Kc8 55.Bc7 Kd7 56.Kg4 Ke6 57.Bg3 Kd7 58.Bh4 Ke6 59.Bf2 Kd7 60.Bg3 Kc8 61.Bc7 Kd7 62.Kf5 Kc8 63.Bd6 Kd7 64.Bc5 Kc8 65.Ke5 Kd7 66.Bf2 Kc8 67.Bg3 Kd7 68.Bf4 Kc8
+- (250.00) Depth: 47 00:00:05 83973kN, tb=127099
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Bf2 Kc8 49.Ke6 Kb8 50.Bh4 Kc8 51.Ke5 Kd7 52.Kf4 Kd6 53.Bf2 Ke7 54.Kf5 Kd7 55.Bg3 Kc8 56.Bc7 Kd7 57.Kg4 Ke6 58.Bg3 Kd7 59.Kg5 Kc6 60.Bf2 Kd7 61.Bc5 Kc8 62.Kf5 Kb8 63.Ke6 Kc8 64.Ke5 Kd7 65.Kf5 Kc8 66.Ke6 Kd8 67.Bf2 Kc8 68.Bh4 Kb8
+- (250.00) Depth: 48 00:00:05 85456kN, tb=130057
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kg4 Ke6 49.Bg3 Kd7 50.Kg5 Kc6 51.Bf2 Kd7 52.Kf5 Kc8 53.Bc5 Kb8 54.Ke6 Kc8 55.Ke5 Kd7 56.Bf2 Kc8 57.Bg3 Kd7 58.Kf5 Kc8 59.Ke6 Kd8 60.Bh4+ Kc8 61.Bf2 Kb8 62.Bg3+ Kc8 63.Kf5 Kd7 64.Kf4 Kc8 65.Kg5 Kd7 66.Bf2 Kc8 67.Kf5 Kb8 68.Kg4 Kc8 69.Kh4 Kd7 70.Bd4 Kc8
+- (250.00) Depth: 49 00:00:05 87603kN, tb=133943
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Bg3 Kc8 49.Ke6 Kd8 50.Bf2 Kc8 51.Be3 Kb8 52.Bf4+ Kc8 53.Kf5 Kd7 54.Be5 Ke7 55.Kg4 Kd7 56.Bh2 Kc6 57.Bg1 Kd6 58.Bd4 Ke6 59.Bc5 Kd7 60.Bf2 Kc8 61.Kh4 Kd7 62.Bd4 Kc8 63.Bg1 Kb8 64.Kg3 Ka8 65.Kf4 Kb8 66.Bc5 Kc8 67.Bf2 Kd8 68.Bg3 Kc8 69.Kg4 Kd7 70.Bh4 Kc8
+- (250.00) Depth: 50 00:00:05 95067kN, tb=146871
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf4 Kc8 49.Bg3 Kb8 50.Kf5+ Kc8 51.Ke6 Kd8 52.Bh4+ Kc8 53.Bg5 Kb8 54.Ke5 Kc8 55.Be3 Kd7 56.Kf5 Kc8 57.Bf4 Kd7 58.Bc7 Kc8 59.Bh2 Kd7 60.Bg1 Kd6 61.Kg4 Ke5 62.Bf2 Kf6 63.Bh4+ Ke6 64.Bg5 Kd7 65.Be3 Ke6 66.Bf4 Kd7 67.Bh2 Ke6 68.Kg5 Kd7 69.Bg1 Kc8 70.Kg4 Kb8 71.Bf2 Kc8
+- (250.00) Depth: 51 00:00:05 96981kN, tb=150662
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf4 Kc8 49.Bg3 Kb8 50.Bf2 Kc8 51.Bh4 Kb8 52.Kg4 Kc8 53.Bg5 Kd7 54.Be3 Ke6 55.Bf4 Kd7 56.Bh2 Ke6 57.Kg5 Kd7 58.Bg1 Kc8 59.Kg4 Kb8 60.Kf5 Ka8 61.Bf2 Kb8 62.Ke6 Kc8 63.Bh4 Kb8 64.Be7 Kc8 65.Bg5 Kb8 66.Be3 Kc8 67.Ke5 Kd7 68.Bf2 Kc8 69.Ke6 Kb8 70.Bh4 Kc8
+- (250.00) Depth: 52 00:00:05 98084kN, tb=155083
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Kf4 Kc8 49.Bg5 Kd7 50.Kg4 Ke6 51.Bh4 Kd7 52.Bf2 Kc8 53.Kg5 Kd7 54.Be3 Ke6 55.Bc5 Ke5 56.Kg4 Ke6 57.Kf4 Kd7 58.Kf5 Kc8 59.Kg4 Kd7 60.Be3 Ke6 61.Bf2 Kd7 62.Bh4 Kc8 63.Bg3 Kd7 64.Kf5 Kc8 65.Kf4 Kb8 66.Kg4+ Kc8 67.Kf5 Kd7 68.Bh4 Kc8 69.Ke5 Kb8 70.Bg5 Kc8 71.Ke6 Kb8
+- (250.00) Depth: 53 00:00:07 119mN, tb=166956
45...Ng5 46.Bxg5 Kd6 47.Bh4 Kd7 48.Bf2 Kc8 49.Ke6 Kb8 50.Bc5 Kc8 51.Kf5 Kd7 52.Be3 Kc8 53.Ke6 Kb8 54.Bg1 Kc8 55.Bd4 Kb8 56.Bf2 Kc8 57.Bc5 Kb8 58.Be3 Kc8 59.Bg5 Kb8 60.Ke5 Kc8 61.Bh4 Kd7 62.Kf4 Kc6 63.Bf2 Kd5 64.Kg3 Ke5 65.Kg4 Kf6 66.Bh4+ Ke6 67.Kg3 Kd7 68.Bg5 Kc8 69.Be3 Kd7 70.Kg4 Ke6 71.Bc5 Kd7 72.Bf2 Kc8
+- (250.00) Depth: 54 00:00:08 154mN, tb=195642

2. try:


1...Kc4 2.Bc5 Kd5 3.Kg4 Ke6 4.Be3 Nf2+ 5.Bxf2 Ke5 6.Be3 Ke6 7.Bd4 Kd7 8.Kf5 Ke7 9.Ke4 Ke6 10.Bc5 Kd7 11.Kf4 Kc6 12.Kf5 Kd7 13.Bf2 Kc8 14.Ke6 Kb8 15.Kf6 Ka8 16.Kf5 Kb8 17.Be3 Kc8 18.Ke5 Kb8 19.Ke6 Kc8 20.Bf4 Kd8 21.Kd6 Kc8 22.Kd5 Kd7 23.Ke4 Ke6 24.Be3 Kd7 25.Ke5 Kc8 26.Ke6 Kb8 27.Bf4+ Kc8 28.Kf5 Kd7 29.Ke5 Kc8 30.Kd6 Kb8 31.Kd5+ Kc8
+- (3.96) Depth: 52 00:00:11 176mN, tb=191887
1...Kc4 2.Bc5 Kd5 3.Kg4 Ke6 4.Be3 Nf2+ 5.Bxf2 Ke5 6.Be3 Ke6 7.Bd4 Kd7 8.Kf5 Ke7 9.Ke4 Ke6 10.Bc5 Kd7 11.Ke5 Kc8 12.Kd6 Kd8 13.Bf2 Kc8 14.Ke6 Kd8 15.Bd4 Kc8 16.Kf5 Kd8 17.Be3 Ke7 18.Bc5+ Kd7 19.Bf2 Kd6 20.Bh4 Kd7 21.Bg3 Kc8 22.Ke6 Kd8 23.Bf4 Kc8 24.Bd2 Kb8 25.Be3 Kc8 26.Bd4 Kd8 27.Bf6+ Kc8 28.Be7 Kb8 29.Bc5 Ka8 30.Kf5 Kb8 31.Ke4 Kc8 32.Be3 Kd7
+- (3.96) Depth: 53 00:00:12 179mN, tb=205475
1...Kc4 2.Bc5 Kd5 3.Kg4 Ke6 4.Be3 Nf2+ 5.Bxf2 Ke5 6.Be3 Ke6 7.Bd4 Kd7 8.Kf5 Kd6 9.Be3 Kd7 10.Bf2 Kd6 11.Kf4 Kd5 12.Be3 Ke6 13.Bc5 Kd7 14.Kf5 Kc8 15.Bd4 Kb8 16.Bf2 Kc8 17.Bh4 Kd7 18.Bg5 Kd6 19.Ke4 Kd7 20.Ke5 Kc8 21.Ke6 Kb8 22.Be3 Kc8 23.Bf2 Kd8 24.Bd4 Kc8 25.Bc5 Kd8 26.Bf2 Kc8 27.Bd4 Kd8 28.Kf5 Ke7 29.Bc5+ Kd7 30.Ke4 Ke6 31.Bf2 Kd6
+- (3.96) Depth: 54 00:00:12 182mN, tb=224334
1...Kc4 2.Bc5 Kd5 3.Kg4 Ke6 4.Be3 Nf2+ 5.Bxf2 Ke5 6.Be3 Ke6 7.Bd4 Kd7 8.Kf5 Kd6 9.Be3 Kd7 10.Bf2 Kd6 11.Bc5+ Kd7 12.Ke5 Kc8 13.Ke6 Kd8 14.Be3 Kc8 15.Bf4 Kd8 16.Bg5+ Kc8 17.Be3 Kb8 18.Ke5 Kc8 19.Bf2 Kd7 20.Bd4 Ke7 21.Bc5+ Kd7 22.Kf5 Kc8 23.Kf6 Kb8 24.Ke6 Kc8 25.Bf2 Kd8 26.Kd6 Kc8 27.Ke7 Kb8 28.Kd7 Ka8 29.Be3 Kb8 30.Bf4+ Ka8 31.Kd6 Kb8 32.Ke6+ Kc8
+- (3.96) Depth: 55 00:00:13 192mN, tb=252058
1...Kc4 2.Bc5
+- (4.02 --) Depth: 56 00:00:16 251mN, tb=289202
1...Kc4 2.Bc5
+- (4.10 --) Depth: 56 00:00:18 280mN, tb=319069
1...Kc4 2.Bc5 Kd5 3.Kg4 Ke6 4.Kxh3 Kf5 5.Kg3 Ke6 6.Kg4 Ke5 7.Kg5 Ke6 8.Be3 Kd7 9.Kf4 Kc8 10.Ke5 Kd7 11.Bf2 Kc8 12.Bd4 Kd8 13.Ke6 Kc8 14.Be3 Kd8 15.Kd6 Kc8 16.Bd4 Kb8 17.Ke7 Ka8 18.Kf6 Kb8 19.Kg6 Kc8 20.Be3 Kd7 21.Kf5 Kd6 22.Bd4 Kd7 23.Bf2 Kc8 24.Ke5 Kd7 25.Bg1 Kd8 26.Kd6 Kc8 27.Be3 Kb8 28.Bd4 Kc8 29.Ke7 Kb8 30.Bc5 Ka8 31.Kf6 Kb8
+- (4.12) Depth: 56 00:00:19 285mN, tb=332899
1...Kc4 2.Bc5 Kd5 3.Kg4 Ke6 4.Kxh3 Kf5 5.Kg3 Ke6 6.Kg4 Ke5 7.Kg5 Ke6 8.Be3 Kd7 9.Kf4 Kc8 10.Ke5 Kd7 11.Bc5 Ke8 12.Kd6 Kd8 13.Bf2 Kc8 14.Ke7 Kb8 15.Kf6 Kc8 16.Bd4 Kd7 17.Bc5 Kd8 18.Ke6 Kc8 19.Ke5 Kb8 20.Be3 Kc8 21.Bd4 Kd8 22.Ke6 Kc8 23.Bc5 Kb8 24.Be3 Kc8 25.Kd6 Kb8 26.Bg5 Kc8 27.Ke6 Kb8 28.Bf4+ Kc8 29.Be3 Kb8 30.Kd5 Ka8 31.Bg5 Kb8 32.Ke5 Kc8
+- (4.12) Depth: 57 00:00:19 287mN, tb=346772
1...Kc4 2.Bc5 Kd5 3.Kg4 Ke6 4.Kxh3 Kf5 5.Kg3 Ke6 6.Kg4 Ke5 7.Kg5 Ke6 8.Be3 Kd7 9.Kf4 Kc8 10.Ke5 Kd7 11.Bc5 Ke8 12.Ke6 Kd8 13.Bd4 Kc8 14.Kd6 Kb8 15.Be3 Ka8 16.Bg5 Kb8 17.Bh4 Kc8 18.Ke7 Kb8 19.Bg5 Kc8 20.Be3 Kb8 21.Kd7 Ka8 22.Ke6 Kb8 23.Ke5 Kc8 24.Kd6 Kd8 25.Bf2 Kc8 26.Bh4 Kb8 27.Kd7 Ka8 28.Bf6 Kb8 29.Bd4 Ka8 30.Be3 Kb8 31.Ke7 Kc8 32.Bc5 Kb8
+- (4.12) Depth: 58 00:00:19 294mN, tb=367735
Jouni

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