a hard test position for computers that I composed

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Uri Blass
Posts: 10282
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

Re: a hard test position for computers that I composed

Post by Uri Blass »

Dave Mitchell wrote:Since the position is illegal, I believe there is a correction needed.

[D]k1b5/1p1p4/p1bP4/PP6/8/6N1/8/K7 w - - 0 1 bm b6



???
The position is clearly legal(black promoted one of the pawns to a bishop)
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Dave Mitchell
Posts: 115
Joined: Thu Nov 25, 2010 12:16 pm

Re: a hard test position for computers that I composed

Post by Dave Mitchell »

<ROFL>

You have a great imagination, Uri - I stand corrected!
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: a hard test position for computers that I composed

Post by Vinvin »

Uri Blass wrote: ↑Fri Jan 14, 2011 10:15 am [d]k1b5/1p1p4/p1bP4/PP6/8/6N1/8/K7 w - - 0 1 bm b6

The plan is very simple after b6 play Kb2-c3-d4-e5-f6-e7-d8
play knight to e7-c8 and later capture the d7 pawn
SF 11, 4 cores@4 GHz, 9m46s to find a ++ score.

Stockfish_20011801_x64_bmi2 :

Code: Select all

Found 145 tablebases
...
 78/13	00:35	 325.036k	9.240k	 0,00	1.bxc6 dxc6 2.Ne4 b6 3.axb6 Kb7 4.Nc5+ Kxb6 5.d7 Kc7 6.dxc8Q+ Kxc8
 79/35+	00:38	 359.224k	9.330k	+0,09	1.b6
 79/43+	00:38	 361.182k	9.337k	+0,19	1.b6
 79/84+	09:46	 7.060.801k	12.049k	+6,97	1.b6
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Jouni
Posts: 3286
Joined: Wed Mar 08, 2006 8:15 pm

Re: a hard test position for computers that I composed

Post by Jouni »

After executing same moves and going back SF11 thinks this is mate in 29.

1.b6 Bf3 2.Nf5 Be4 3.Ne7 Kb8 4.Kb2 Bd3 5.Kc3 Bb1 6.Kd4 Bh7 7.Ke5 Bc2 8.Kf6 Bb3 9.Kg7 Bd1 10.Kf7 Bh5+ 11.Kf8 Ka8 12.Nxc8 Kb8 13.Na7 Bd1 14.Ke8 Bg4 15.Kd8 Bh3 16.Nc8 Be6 17.Ne7 Bf7 18.Kxd7 Bh5 19.Kd8 Be2 20.d7 Bb5 21.Ng6 Ba4 22.Ke7 Bxd7 23.Kxd7 Ka8 24.Ne5 Kb8 25.Kd8 Ka8 26.Nc6 bxc6 27.Kc7 c5 28.b7+ Ka7 29.b8Q#
+- (#29) Depth: 57/58 00:00:00 277kN

BTW sadly SF11 has issues in mate finding see https://github.com/official-stockfish/S ... ssues/2543!
Jouni
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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: a hard test position for computers that I composed

Post by MikeB »

Uri Blass wrote: ↑Fri Jan 14, 2011 10:15 am [d]k1b5/1p1p4/p1bP4/PP6/8/6N1/8/K7 w - - 0 1 bm b6

The plan is very simple after b6 play Kb2-c3-d4-e5-f6-e7-d8
play knight to e7-c8 and later capture the d7 pawn

stockfish(with slow hardware) does not see it in an hour but after making b6 it suddenly see the win fast at depths 53-56

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 68	+48.37!	47.6G	5:32.89	b6!
 68	+45.18?	47.6G	5:32.88	b6 Bg2?
 67	+48.37!	45.8G	5:15.06	b6!
 67	+45.18?	45.7G	5:14.16	b6 Bg2?
 66	+48.37 	45.1G	5:08.75	b6 Bg2 Nf5 Kb8 Ne7 Be4 Kb2 Bc6 Kc2 Be4+ Kc3 Bg2 Kc4 Be4 Kb4 Bf3 Ka3 Bg4 Kb2 Be2 Kc3 Bf3 Kb4 Bd1 Ng6 Bh5 Nh4 Bf7 Nf5 Bg6 Ne7 Bf7 Kc3 Ba2 Ng6 Bf7 Nf4 Be6 Kc2 Bf5+ Kd2 Be4 Kc3 Bf3 Kb3 Be4 Ka2 Bc2 Kb2 Bd1 Ng6 Bh5 Nh4 Be2 Kb3 Bd1+ K
 65	+48.37 	44.8G	5:05.95	b6 Bg2 Nf5 Kb8 Ne7 Be4 Kb2 Bc6 Kc2 Be4+ Kc3 Bg2 Kc4 Be4 Kb4 Bf3 Ka3 Bg4 Kb2 Be2 Kb3 Bd1+ Kc3 Bf3 Ng6 Bd1 Kc4 Bc2 Nf4 Bd1 Kb4 Bg4 Kc3 Be6 Kc2 Bf5+ Kd2 Be4 Kc3 Bf3 Kd3 Bg4 Kd4 Bf3 Kc5 Be4 Kc4 Ka8 Kd4 Bf3 Ke3 Bc6 Ng6 Ba4 Kd2 Bc6 K
 64	+48.37 	44.8G	5:05.92	b6 Bg2 Nf5 Kb8 Ne7 Be4 Kb2 Bc6 Kc2 Be4+ Kc3 Bg2 Kc4 Be4 Kb4 Bf3 Kb3 Bg2 Ng6 Bf3 Kc4 Be4 Nf4 Ka8 Kb4 Bc6 Ng6 Bf3 Kc4 Be4 Nf4 Bc6 Kd4 Bb5 Ke5 Bc4 Ke4 Kb8 Ng6 Be2 Ke3 Bh5 Nf4 Bg4 Kd4 Bf3 Kc3 Bd1 Kb4 Bg4 Kb3 Bf5 Kc3 Be6 Kb2 Bg8 Ka3
 63	+48.37 	44.8G	5:05.90	b6 Bg2 Nf5 Kb8 Ne7 Be4 Kb2 Bc6 Kc2 Be4+ Kc3 Bg2 Kd4 Bf3 Kd3 Bd1 Ng6 Bb3 Kd4 Bd1 Ke3 Bh5 Nf4 Bg4 Kd4 Bf3 Ke5 Ka8 Kf6 Bc6 Kf5 Kb8 Ke5 Bb5 Kd4 Ka8 Kc3 Bc6 Kc4 Be4 Kd4 Bf3 Ke3 Bc6 Ng6 Ba4 Kd3 Bb5+ Kc3 Bf1 Kb3 Bh3 Ka3 Bf1 Ne7 Bc4 Kb
 62	+48.37!	44.8G	5:05.70	b6!
 62	+45.18?	44.8G	5:05.68	b6 Bg2?
 61	+48.37 	44.3G	5:00.19	b6 Bg2 Nf5 Kb8 Ne7 Be4 Ka2 Bf3 Kb3 Be2 Kc3 Bf3 Kd3 Bd1 Kd2 Bf3 Ng6 Bg4 Ke3 Bh5 Ne7 Bd1 Kd3 Bb3 Kc3 Bf7 Kc2 Bc4 Kd2 Bb5 Kc3 Bc6 Ng6 Bg2 Kd3 Bf1+ Ke3 Bb5 Kd4 Bf1 Ne7 Be2 Ke5 Bd1 Kf5 Bf3 Kf6 Bd1 Ke5 Bg4 Nd5 Bh5 Nf4 Bg4 Kd4 Bf3 Kc3
 60	+48.37 	44.3G	5:00.18	b6 Bg2 Nf5 Kb8 Ne7 Be4 Ka2 Bf3 Kb3 Be2 Kc3 Bf3 Kd3 Bc6 Ng6 Bb5+ Kc3 Be2 Kc2 Bg4 Ne7 Be2 Kb1 Bc4 Ka1 Bb3 Kb2 Ba4 Kc3 Bc6 Ng6 Bg2 Nf4 Bc6 Kd4 Bf3 Ke5 Bg4 Ng6 Bh5 Ne7 Bf3 Kf5 Bh5 Ke4 Be8 Kd5 Ka8 Kc5 Kb8 Kc4 Bh5 Kd4 Bf3 Kc5 Bg4 Kd5
 59	+48.37 	44.3G	5:00.13	b6 Bg2 Nf5 Kb8 Ne7 Be4 Ka2 Bf3 Kb3 Be2 Kc3 Bf3 Kd3 Bc6 Kd4 Bf3 Ke5 Bg4 Ke4 Bh5 Ke3 Bd1 Kd2 Bf3 Ng6 Bg4 Kc3 Be2 Kc2 Bg4 Ne7 Be2 Kb1 Bc4 Ka1 Bb3 Kb2 Ba4 Kc3 Bc6 Ng6 Bg2 Kb2 Be4 Nf4 Ka8 Kc3 Bf3 Kd3 Kb8 Kd2 Ka8 Ke3 Bc6 Kd4 Bf3 Ke5 
 58	+48.37!	44.2G	4:59.50	b6!
 58	+45.18?	44.2G	4:59.49	b6 Bg2?
 57	+48.37!	44.2G	4:58.93	b6!
 57	+45.18?	44.2G	4:58.93	b6 Bg2?
 56	+48.37!	44.2G	4:58.83	b6!
 56	+45.18?	44.2G	4:58.83	b6 Bg2?
 55	+48.37 	44.0G	4:57.15	b6 Bg2 Nf5 Kb8 Ne7 Be4 Ka2 Bf3 Kb3 Be2 Ka3 Bd3 Kb4 Be2 Kb3 Bf3 Ka2 Be4 Ka1 Bc6 Kb1 Bg2 Kc2 Be4+ Kc1 Bf3 Kd2 Bc6 Kc3 Be4 Kd4 Bf3 Ke5 Be2 Kf6 Bh5 Kf5 Be8 Ke5 Bf7 Ke4 Bh5 Kd3 Bf3 Kd4 Bg2 Ke3 Bc6 Kf4 Ba4 Kf5 Bd1 Kg6 Bb3 Kg7 Bd1
 54	+48.37 	44.0G	4:57.09	b6 Bg2 Nf5 Kb8 Ne7 Be4 Ka2 Bf3 Kb3 Be2 Ka3 Bd3 Kb4 Be2 Kb3 Bf3 Ka2 Be4 Ka1 Bc6 Kb1 Bg2 Kc2 Be4+ Kd2 Bf3 Ke3 Bg4 Ke4 Be2 Kf5 Bf1 Kf4 Be2 Ke4 Bg4 Ke3 Be6 Kf4 Bb3 Ke4 Bf7 Kd3 Bb3 Ke2 Bc4+ Kd2 Bb3 Kd3 Ba4 Kc3 Bc6 Kd4 Bg2 Ke3 Bc6
 53	+48.37!	44.0G	4:56.86	b6!
 53	+45.18?	44.0G	4:56.83	b6 Bg2?
 52	+48.37!	43.8G	4:55.46	b6!
 52	+45.18?	43.8G	4:55.46	b6 Bg2?
 51	+48.37!	43.8G	4:55.44	b6!
 51	+45.18?	43.8G	4:55.44	b6 Bg2?
 50	+48.37!	43.8G	4:55.35	b6!
 50	+45.18?	43.8G	4:55.34	b6 Bg2?
 49	+43.79?	43.8G	4:54.64	b6 Bg2?
 49	+48.37!	43.8G	4:54.64	b6!
 49	+45.18?	43.8G	4:54.64	b6 Bg2?
 48	+48.37!	43.7G	4:54.63	b6!
 47	+21.05?	43.7G	4:54.61	b6 Bg2?
 47	+48.37!	43.7G	4:54.59	b6!
 47	+44.70!	43.7G	4:54.59	b6!
 47	+40.56?	43.7G	4:54.58	b6 Bg2?
 47	+42.30?	43.7G	4:54.58	b6 Bg2?
 47	+43.79?	43.7G	4:54.58	b6 Bg2?
 47	+45.18?	43.7G	4:54.58	b6 Bg2?
 46	+48.43 	43.7G	4:54.54	b6 Bg2 Nf5 Bc6 Kb2 Bg2 Ne7 Be4 Kb3 Bc6 Kc3 Bb5 Kd4 Bf1 Ke5 Bh3 Ke4 Kb8 Kd4 Be6 Ke5 Bg4 Kf6 Bh5 Kg7 Bg4 Kf7 Bf3 Kg6 Ka8 Kf5 Be2 Ke5 Bd1 Nxc8 Kb8 Na7 Bg4 Kd5 Bd1 Ke4 Bg4 Kd3 Bf3 Kc3 Ka8 Nc8
 45	+48.43 	43.7G	4:54.52	b6 Bg2 Nf5 Kb8 Ne7 Bh1 Kb2 Be4 Kc3 Bc6 Kd3 Bf3 Kd4 Bc6 Ke5 Bf3 Kf6 Bh5 Kg7 Be8 Kg8 Bh5 Kf8 Bf3 Ke8 Ka8 Nxc8 Bd5 Ke7 Kb8 Na7 Bf3 Kf6 Bh5 Kf5 Bf7 Ke5 Be6
 45	+48.37!	43.7G	4:54.41	b6!
 45	+41.33!	43.7G	4:54.41	b6!
 45	+14.78!	43.6G	4:53.86	b6!
 45	+13.43!	43.4G	4:52.60	b6!
 45	+12.38!	43.3G	4:51.84	b6!
 45	+11.53!	42.0G	4:43.11	b6!
 45	+10.87!	41.8G	4:42.13	b6!
 45	+10.36!	41.8G	4:41.83	b6!
 45	+9.22?	41.7G	4:41.45	b6 Bg2?
 45	+10.37?	41.7G	4:41.45	b6 Bg2?
 45	+10.64?	41.7G	4:41.45	b6 Bg2?
 44	+10.90 	41.7G	4:41.43	b6 Bg2 Nf5 Kb8 Ne7 Ka8 Kb2 Kb8 Kc3 Bh3 Kc4 Be6+ Kd4 Ba2 Ke5 Bb3 Kf6 Be6 Kg6 Ka8 Kg7 Bg4 Nxc8 Kb8 Na7 Bh5 Kf8 Be2 Ke8 Bg4 Kf7 Be6+ Ke7 Bg8 Kd8 Bd5 Ke8 Bg8 Ke7 Ka8 Nc8 Be6 Ke8 Kb8 Kd8 Bc4 Kxd7 Bf7 Ne7
 44	+10.54!	41.7G	4:41.42	b6!
 44	+9.17!	41.5G	4:40.03	b6!
 44	+8.08!	41.2G	4:38.19	b6!
 44	+7.23!	40.7G	4:34.69	b6!
 44	+6.56!	39.3G	4:25.05	b6!
 44	+6.03!	39.1G	4:24.01	b6!
 44	+5.62!	39.0G	4:23.66	b6!
 44	+5.31!	30.1G	3:24.26	b6!
 44	+5.07!	29.5G	3:20.30	b6!
 44	+4.89!	21.2G	2:24.72	b6!
 43	+4.63 	230.0M	0:01.85	b6 Bg2 Nf5 Bf3 Ne7 Kb8 Kb2 Bh5 Kc2 Bf7 Kc3 Be6 Kd4 Ka8 Ke5 Bb3 Kf6 Ba4 Kf7 Bc2 Nxc8 Bb3+ Ke8 Kb8 Kd8 Bf7 Kxd7 Bh5 Na7 Bg4+ Ke8 Bh3 Ke7 Ka8 Kd8 Bg4 Kc7 Be6 Nc6
 42	  0.00 	50.0M  	0:00.47	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 41	  0.00 	41.0M  	0:00.39	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 40	  0.00 	36.3M  	0:00.35	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 39	  0.00 	31.9M  	0:00.31	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 38	  0.00 	26.3M  	0:00.26	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 37	  0.00 	22.0M  	0:00.22	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 36	  0.00 	18.1M  	0:00.19	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 35	  0.00 	16.0M  	0:00.17	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 34	  0.00 	15.7M  	0:00.17	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 33	  0.00 	12.5M  	0:00.14	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 32	  0.00 	10.9M  	0:00.12	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 31	  0.00 	9.91M  	0:00.12	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 30	  0.00 	7.50M  	0:00.09	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 29	  0.00 	6.10M  	0:00.08	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 28	  0.00 	5.04M  	0:00.07	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 27	  0.00 	3.95M  	0:00.06	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 26	  0.00 	3.07M  	0:00.05	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 d7 Bxd7 Nxd7
 25	  0.00 	2.52M  	0:00.05	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 d7 Bxd7 Nxd7
 24	  0.00 	2.08M  	0:00.04	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 23	  0.00 	1.58M  	0:00.04	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 22	  0.00 	1.07M  	0:00.03	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 21	  0.00 	918026	0:00.03	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 20	  0.00 	829436	0:00.03	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 19	  0.00 	806658	0:00.03	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 18	  0.00 	780581	0:00.03	bxc6 dxc6 Ne4 b6 Nf6 Ka7 d7 Bxd7 Nxd7 bxa5
 17	  0.00 	368732	0:00.02	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 16	  0.00 	355308	0:00.02	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 15	  0.00 	225718	0:00.02	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 14	  0.00 	184849	0:00.02	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 13	  0.00 	173195	0:00.02	bxc6 dxc6 Ne4 Ka7 Kb2 b6 Nf6 bxa5 Kc3 Kb7 d7 Kc7 dxc8=Q+ Kxc8
 12	  0.00 	118909	0:00.02	bxc6 dxc6 Ne4 b6 Nf6 bxa5 d7 Bxd7 Nxd7
 11	  0.00 	97600  	0:00.01	bxc6 dxc6 Ne4 b6 Nf6 bxa5 d7 Bxd7 Nxd7
 10	  0.00 	86563  	0:00.01	bxc6 dxc6 Ne4 b6 Nf6 bxa5 d7 Bxd7 Nxd7
  9	  0.00 	80367  	0:00.01	bxc6 dxc6 Ne4 b6 Nf6 bxa5 d7 Bxd7 Nxd7
  8	  0.00 	76627  	0:00.01	bxc6 dxc6 Ne4 b6 Nf6 bxa5 d7 Bxd7 Nxd7
  7	+0.09 	40064  	0:00.00	bxc6 bxc6 Ne4 Kb8 Kb2 Ka7 Kb1 Kb7
  6	+0.13 	31422  	0:00.00	bxc6 bxc6 Ne4 Bb7 Nc5 Bc8
  5	+0.13 	27691  	0:00.00	bxc6 bxc6 Ne4 Bb7
  4	 -0.09 	24602  	0:00.00	bxc6 bxc6 Ne4 Kb7 Kb2
  3	 -0.09 	20744  	0:00.00	bxc6 dxc6 Ne4 Bf5 Nc5
  2	 -0.12 	14581  	0:00.00	bxc6 dxc6 Ne2
  1	 -0.09 	1096    	0:00.00	bxc6 dxc6
  0	#
times are a changing ...Honey-XI-LP (honey eleven with large pages enabled)
https://github.com/MichaelB7/Stockfish/releases/tag/XI
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Kieren Pearson
Posts: 70
Joined: Tue Dec 31, 2019 2:52 am
Full name: Kieren Pearson

Re: a hard test position for computers that I composed

Post by Kieren Pearson »

zullil wrote: ↑Fri Jan 14, 2011 3:31 pm Which engines find mate-in-20?

[d]1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - - 17 9
Surprisingly my engine Halogen (Dev version ~2150 CCRL Blitz) is able to find it relatively quickly. Not sure if the line is completely correct though maybe someone can verify?

Code: Select all

FEN: 1Q6/k1K5/p7/P1p5/8/8/8/8 b - - 0 31

Halogen Experimental:
 1/1	00:00	 16	16k	-2.58	Kg7-f6
 2/2	00:00	 89	6k	-2.72	Ne7xc8 Kb8xc8
 3/3	00:00	 363	13k	-2.24	Ne7xc8 Kb8xc8 Kg7-f6
 4/4	00:00	 873	21k	-2.43	Ne7xc8 Kb8xc8 Kg7-f6 Bd1-g4
 5/5	00:00	 1k	24k	-2.24	Ne7xc8 Kb8xc8 Kg7-f6 Bd1-g4 Kf6-e5
 6/6	00:00	 3k	38k	-2.33	Ne7xc8 Kb8xc8 Kg7-f6 Bd1-g4 Kf6-e5 Bg4-e6
 7/7	00:00	 6k	69k	-2.19	Kg7-f6 Bd1-g4 Kf6-e5 Bg4-f3 Ke5-d4 Bf3-e2 Ne7xc8
 8/8	00:00	 8k	81k	-2.19	Kg7-f6 Bd1-g4 Kf6-e5 Bg4-f3 Ke5-d4 Bf3-e2 Ne7xc8 Kb8xc8
 9/15	00:00	 19k	165k	-2.19	Kg7-f6 Bd1-g4 Kf6-e5 Bg4-e2 Ke5-d4 Be2-f3 Kd4-e5 Bf3-c6 Ke5-d4 Bc6-g2 Kd4-e5 Bg2-f1 Ne7xc8 Kb8xc8 Ke5-d4
 10/12	00:00	 37k	265k	+0.30	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-b5 Ne7xc8 Bb5-c6 Nc8-e7 Bc6-d5
 11/12	00:00	 43k	278k	+0.30	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-b5 Ne7xc8 Bb5-a4 Nc8-e7 Ba4-c6
 12/15	00:00	 51k	300k	+0.30	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-f3 Ne7xc8 Bf3-g4 Nc8-e7 Bg4-e6 Kd8-e8 Be6-g4 Ne7-g6
 13/17	00:00	 73k	381k	+0.37	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-f3 Ne7xc8 Bf3-g4 Nc8-e7 Bg4-e6 Kd8-e8 Kb8-a8 Ke8-d8 Ka8-b8 Kd8-e8
 14/15	00:00	 102k	474k	+0.48	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-f3 Ne7xc8 Bf3-g4 Nc8-e7 Bg4-e6 Ne7-g6 Be6-f5 Ng6-e5
 15/16	00:00	 124k	527k	+0.48	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-f3 Ne7xc8 Bf3-g4 Nc8-e7 Bg4-e6 Ne7-g6 Be6-f5 Ng6-e5 Bf5-e6
 16/21	00:00	 429k	1,216k	+1.10	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-f3 Ne7xc8 Bf3-e2 Kd8xd7 Be2-g4+ Kd7-d8 Bg4xc8 d6-d7 Bc8xd7 Kd8xd7 Kb8-a8 Kd7-e6 Ka8-b8 Ke6-d5
 17/23	00:00	 908k	1,819k	+2.43	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-b5 Ne7xc8 Bb5-e2 Nc8-e7 Be2-g4 Ne7-g6 Bg4-h3 Ng6-e5 Kb8-a8 Ne5xd7 Bh3-e6 Kd8-e7 Be6-f5 Ke7-d8 Bf5-e6 Kd8-e7
 18/27	00:00	 2,066k	2,358k	+2.71	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-b5 Ne7xc8 Bb5-e2 Nc8-e7 Be2-g4 Ne7-g6 Kb8-a8 Ng6-e5 Bg4-e6 Ne5xd7 Be6-f5 Kd8-e7 Bf5-e4 Ke7-d8 Be4-c6 Kd8-e7 Bc6-b5 Ke7-d8 Bb5-c6 Kd8-e7
 19/25	00:00	 2,215k	2,361k	+2.71	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ke8-d8 Bc6-b5 Ne7xc8 Bb5-e2 Nc8-e7 Be2-g4 Ne7-g6 Kb8-a8 Ng6-e5 Bg4-e6 Ne5xd7 Be6-d5 Kd8-e7 Bd5-c6 Ke7-d8 Bc6-b5 Kd8-e7 Bb5-c6 Ke7-d8
 20/26	00:01	 2,804k	2,475k	+1.10	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-f3 Kf8-e8 Bf3-c6 Ne7-f5 Bc6-f3 Ke8-d8 Bf3-c6 Nf5-e7 Bc6-b5 Ne7xc8 Bb5-e2 Kd8xd7 Be2-g4+ Kd7-d8 Bg4xc8 d6-d7 Bc8xd7 Kd8xd7 Kb8-a8 Kd7-e6 Ka8-b8 Ke6-d5 Kb8-a8
 21/26	00:01	 3,318k	2,493k	+1.00	Kg7-f8 Bd1-h5 Ne7-g8 Bh5-g6 Kf8-e7 Bg6-h7 Ng8-f6 Bh7-f5 Ke7-e8 Bf5-e6 Nf6xd7+ Kb8-a8 Nd7-c5 Be6-f5 d6-d7 Bf5-g6+ Ke8-e7 Bc8xd7 Nc5xd7 Bg6-f5 Nd7-c5 Ka8-b8 Ke7-f6 Bf5-c2 Kf6-e5 Bc2-g6
 22/32	00:01	 3,688k	2,500k	+1.00	Kg7-f8 Bd1-h5 Ne7-g8 Bh5-g6 Kf8-e7 Bg6-h7 Ng8-f6 Bh7-f5 Ke7-e8 Bf5-e6 Ke8-d8 Be6-b3 Nf6xd7+ Bc8xd7 Kd8xd7 Bb3-a4+ Kd7-d8 Kb8-a8 Kd8-c8 Ba4-c6 d6-d7 Bc6xd7+ Kc8xd7 Ka8-b8 Kd7-e6 Kb8-c8 Ke6-e7 Kc8-b8 Ke7-d6 Kb8-c8 Kd6-c5 Kc8-b8
 23/30	00:01	 3,995k	2,488k	+1.10	Kg7-f8 Bd1-h5 Ne7-g8 Bh5-g6 Kf8-e7 Bg6-h7 Ng8-f6 Bh7-f5 Ke7-e8 Bf5-e6 Ke8-d8 Be6-b3 Nf6xd7+ Bc8xd7 Kd8xd7 Bb3-a4+ Kd7-d8 Kb8-a8 Kd8-e7 Ba4-c6 Ke7-e6 Ka8-b8 d6-d7 Bc6xd7+ Ke6xd7 Kb8-a8 Kd7-e6 Ka8-b8 Ke6-d5 Kb8-a8
 24/36	00:01	 4,833k	2,548k	+0.90	Kg7-f8 Bd1-h5 Ne7-g8 Bh5-g6 Kf8-e7 Bg6-h7 Ng8-f6 Bh7-f5 Ke7-e8 Bf5-e6 Ke8-d8 Be6-b3 Nf6xd7+ Bc8xd7 Kd8xd7 Bb3-a4+ Kd7-d8 Kb8-a8 Kd8-e7 Ba4-c6 Ke7-e6 Bc6-b5 d6-d7 Bb5xd7+ Ke6xd7 Ka8-b8 Kd7-e6 Kb8-a8 Ke6-e7 Ka8-b8 Ke7-d7 Kb8-a8 Kd7-e6 Ka8-b8 Ke6-d5 Kb8-a8
 25/34	00:02	 5,364k	2,545k	+1.00	Kg7-f8 Bd1-h5 Ne7-g8 Bh5-g6 Kf8-e7 Bg6-h7 Ng8-f6 Bh7-f5 Ke7-e8 Bf5-e6 Ke8-d8 Be6-b3 Nf6xd7+ Bc8xd7 Kd8xd7 Bb3-a4+ Kd7-d8 Kb8-a8 d6-d7 Ba4-c6 Kd8-c8 Bc6xd7+ Kc8xd7 Ka8-b8 Kd7-d8 Kb8-a8 Kd8-e7 Ka8-b8 Ke7-d7 Kb8-a8 Kd7-e6 Ka8-b8 Ke6-d7 Kb8-a8
 26/38	00:03	 8,383k	2,740k	+1.10	Ne7-d5 Bd1-c2 Nd5-e3 Bc2-d3 Kg7-f7 Bd3-b1 Ne3-g4 Bb1-e4 Ng4-e5 Kb8-a8 Kf7-f6 Be4-d5 Kf6-e7 Bd5-e4 Ke7-d8 Ka8-b8 Ne5xd7+ Bc8xd7 Kd8xd7 Kb8-a8 Kd7-c8 Be4-c6 Kc8-c7 Bc6-b5 d6-d7 Bb5xd7 Kc7xd7 Ka8-b8 Kd7-d8 Kb8-a8 Kd8-e7 Ka8-b8 Ke7-d7 Kb8-a8 Kd7-e6 Ka8-b8 Ke6-d7 Kb8-a8
 27/38	00:04	 13,323k	2,929k	+1.10	Ne7-g6 Bd1-e2 Kg7-f6 Be2-g4 Kf6-e7 Bg4-h5 Ng6-f8 Kb8-a8 Ke7-d8 Ka8-b8 Nf8-h7 Bh5-g6 Nh7-f6 Bg6-f7 Nf6xd7+ Bc8xd7 Kd8xd7 Bf7-c4 Kd7-d8 Kb8-a8 d6-d7 Bc4-e6 Kd8-c8 Be6-g4 Kc8-c7 Bg4xd7 Kc7xd7 Ka8-b8 Kd7-d8 Kb8-a8 Kd8-e7 Ka8-b8 Ke7-d7 Kb8-a8 Kd7-e6 Ka8-b8 Ke6-d7 Kb8-a8
 28/21	00:09	 29,828k	3,081k	+1.10	Kg7-f7 Bd1-h5+ Kf7-f8 Bh5-g4 Ne7-d5 Bg4-h5 Nd5-f6 Bh5-g6 Nf6-g8 Bg6-b1 Kf8-e8 Bb1-g6+ Ke8-d8 Bg6-f7 Ng8-e7 Kb8-a8 Kd8xc8 Bf7-e8 Ne7-d5 Be8-h5 Nd5-c7+
 29/37	00:22	 68,510k	3,082k	+M24	Kg7-f7 Bd1-h5+ Kf7-f8 Kb8-a8 Ne7xc8 Ka8-b8 Nc8-a7 Bh5-g4 Kf8-e8 Bg4-f5 Ke8-d8 Kb8-a8 Na7-c8 Ka8-b8 Nc8-e7 Bf5-c2 Kd8xd7 Bc2-a4+ Kd7-d8 Ba4-c2 Ne7-c8 Bc2-b1 Nc8-a7 Bb1-f5 d6-d7 Kb8-a8 Na7-c6 b7xc6 Kd8-c8 Bf5xd7+ Kc8-c7 Bd7-c8 Kc7xc8 c6-c5 b6-b7+ Ka8-a7 b7-b8Q+
 30/43	00:22	 71,051k	3,112k	+M24	Kg7-f7 Bd1-h5+ Kf7-f8 Kb8-a8 Ne7xc8 Ka8-b8 Nc8-a7 Bh5-g4 Kf8-e8 Bg4-f5 Ke8-d8 Kb8-a8 Na7-c8 Ka8-b8 Nc8-e7 Bf5-c2 Kd8xd7 Bc2-a4+ Kd7-d8 Ba4-c2 Ne7-c8 Kb8-a8 Kd8-c7 Bc2-a4 Nc8-e7 Ba4-b5 d6-d7 Bb5xd7 Kc7xd7 Ka8-b8 Ne7-c8 Kb8-a8 Nc8-a7 Ka8-b8 Kd7-d8 Kb8-a8 Na7-c6 b7xc6 Kd8-c7 c6-c5 b6-b7+ Ka8-a7 b7-b8Q+
 31/43	00:24	 77,000k	3,157k	+M24	Kg7-f7 Bd1-h5+ Kf7-f8 Kb8-a8 Ne7xc8 Ka8-b8 Nc8-a7 Bh5-g4 Kf8-e8 Bg4-f5 Ke8-d8 Kb8-a8 Na7-c8 Ka8-b8 Nc8-e7 Bf5-c2 Kd8xd7 Bc2-a4+ Kd7-d8 Ba4-c2 Ne7-c8 Kb8-a8 Kd8-c7 Bc2-a4 Nc8-e7 Ba4-b5 d6-d7 Bb5xd7 Kc7xd7 Ka8-b8 Ne7-c8 Kb8-a8 Nc8-a7 Ka8-b8 Kd7-d8 Kb8-a8 Na7-c6 b7xc6 Kd8-c7 c6-c5 b6-b7+ Ka8-a7 b7-b8Q+
 32/33	00:26	 86,080k	3,235k	+M22	Kg7-f7 Bd1-h5+ Kf7-f8 Kb8-a8 Ne7xc8 Ka8-b8 Nc8-a7 Bh5-g4 Kf8-e8 Bg4-f5 Ke8-e7 Bf5-g4 Ke7-d8 Bg4-e6 Na7-c8 Be6-g4 Nc8-e7 Kb8-a8 Ne7-g6 Bg4-h3 Kd8-c8 Bh3-f1 Kc8xd7 Bf1-d3 Ng6-f4 Bd3-f1 Kd7-c7 Bf1-b5 Nf4-d5 Bb5-c6 Nd5-f4 Bc6-b5 Nf4-d5
 33/41	00:33	 113,643k	3,418k	+M21	Kg7-f7 Bd1-h5+ Kf7-f8 Kb8-a8 Ne7xc8 Ka8-b8 Nc8-a7 Bh5-g4 Kf8-e8 Bg4-f5 Ke8-d8 Kb8-a8 Na7-c8 Ka8-b8 Nc8-e7 Bf5-c2 Kd8xd7 Bc2-a4+ Kd7-d8 Ba4-b5 Ne7-c8 Kb8-a8 Nc8-a7 Bb5-a4 Kd8-e7 Ba4-d7 Ke7xd7 Ka8-b8 Kd7-d8 Kb8-a8 d6-d7 Ka8-b8 Na7-c6+ b7xc6 Kd8-e7 c6-c5 d7-d8Q+ Kb8-b7 Qd8-c7+ Kb7-a8 Qc7-c8+
 34/45	00:41	 148,246k	3,561k	+M20	Kg7-f7 Bd1-h5+ Kf7-f8 Kb8-a8 Ne7xc8 Ka8-b8 Nc8-a7 Bh5-g4 Kf8-e8 Bg4-f5 Ke8-d8 Kb8-a8 Na7-c8 Ka8-b8 Nc8-e7 Bf5-c2 Kd8xd7 Bc2-a4+ Kd7-d8 Ba4-b5 d6-d7 Bb5-a4 Ne7-c8 Kb8-a8 Kd8-e8 Ka8-b8 Nc8-a7 Kb8-a8 Ke8-d8 Ba4-d1 Kd8-c8 Bd1-g4 Kc8-c7 Bg4xd7 Kc7xd7 Ka8-b8 Kd7-d8 Kb8-a8 Na7-c6 b7xc6 Kd8-c7 c6-c5 b6-b7+ Ka8-a7 b7-b8Q+
EDIT: I completely missed that the pv given is of length 45 plys?? I guess that's what I get for extracting the PV from the transposition table. Maybe its time to update to a triangular PV table
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MikeB
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Re: a hard test position for computers that I composed

Post by MikeB »

zullil wrote: ↑Fri Jan 14, 2011 3:31 pm Which engines find mate-in-20?

[d]1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - - 17 9

Code: Select all

Black-Diamond XI-LP one thread, 60 threads: 0.1 second
	mover viewpoint		fewer / Multi-PV setting = 1 / more
exclude: none best +tail                                          
dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 44	  #20 	52.3M  	0:10.30	Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Bh3 Kd8 Bf5 Nc8 Be6 Ne7 Bf7 Kxd7 Bh5 Ng8 Bg4+ Ke8 Be2 Ke7 Bb5 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 43	  #22 	21.7M  	0:04.76	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Be4 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Ng8 Bg4+ Ke8 Be2 Ke7 Bb5 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd8 Ka8 Nc6 bxc6 Kc8 c5 b7+ Ka7 b8=Q#
 42	  #22 	14.9M  	0:03.28	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Be4 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bf1 Ke7 Bh3 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 41	  #22 	13.1M  	0:02.92	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bc2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bf1 Ke7 Bh3 d7 Bxd7 Kxd7 Ka8 Ne5 Kb8 Kd8 Ka8 Nc6 bxc6 Kc8 c5 b7+ Ka7 b8=Q#
 40	  #22 	10.0M  	0:02.30	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bc2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 d7 Bb5 Ng6 Ba4 Ke7 Bxd7 Kxd7 Ka8 Ne5 Kb8 Kd8 Ka8 Nc6 bxc6 Kc8 c5 b7+ Ka7 b8=Q#
 39	  #22 	8.36M  	0:01.91	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Be4 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 d7 Bb5 Ng6 Ba4 Ke7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 38	  #22 	7.86M  	0:01.81	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Be4 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 d7 Bb5 Ng6 Ba4 Ke7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 37	  #22 	6.67M  	0:01.53	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Be4 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Kd8 Kb8 Ne5 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 36	  #22 	4.81M  	0:01.11	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Be4 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Kd8 Kb8 Ne7 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 35	  #22 	4.26M  	0:00.98	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Bh7 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Kd8 Kb8 Ne7 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 34	  #22 	3.77M  	0:00.88	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Bh7 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Kd8 Kb8 Ne7 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 33	  #22 	3.64M  	0:00.85	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bd3 Ne7 Bh7 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 32	  #22 	3.35M  	0:00.78	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bc2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 31	  #22 	2.58M  	0:00.64	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Be4 Ne7 Bb1 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 30	  #22 	2.43M  	0:00.61	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Be4 Ne7 Bb1 Nxc8 Bg6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 29	  #22 	2.29M  	0:00.58	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bc2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd1 Ke7 Ba4 d7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 28	  #22 	2.07M  	0:00.54	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bc2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Bd1 d7 Ba4 Ng6 Bb5 Ke7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 27	  #22 	2.02M  	0:00.53	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Ba2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 Ng6 Bd3 d7 Bf5 Ke7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 26	  #22 	1.92M  	0:00.51	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Ba2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Bf3 Ng6 Bc6 d7 Bb5 Ke7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 25	  #22 	1.84M  	0:00.49	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Ba2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Bf3 Ng6 Bc6 d7 Bb5 Ke7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5 b7+ Ka7 b8=Q#
 24	  #22 	1.80M  	0:00.48	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Ba2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Bf3 Ng6 Bc6 d7 Bb5 Ke7 Bxd7 Kxd7 Ka8 Ne7 Kb8 Kd6 Ka8 Nc6 bxc6 Kc7 c5
 23	  #22 	1.79M  	0:00.48	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Ba2 Ne7 Bb3 Nxc8 Be6 Ne7 Bf7 Kxd7 Bh5 Kd8 Bf3 Ng6 Bc6 d7 Bb5 Ke7
 22	  #24 	1.45M  	0:00.41	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bh7 Ne7 Be4 Nxc8 Bg6 Ne7 Bb1 Ng8 Bd3 Nf6 Bb5 Nxd7+ Ka8 Kc7 Bc6 Nf6 Ba4 Ng8 Bb5 Ne7 Ba4 d7 Bxd7 Kxd7 Kb8 Kd6 Ka8
 21	+4.95 	1.26M  	0:00.38	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bh7 Ne7 Bb1 Nxc8 Bg6 Ne7 Bb1 Ng8 Ba2 Nf6 Be6 Nxd7+ Ka8 Kc7 Bh3 Nf6 Bf5 d7
 20	+5.05 	682976	0:00.21	Kf7 Bh5+ Kf8 Ka8 Ng8 Bg6 Ke7 Bh7 Nf6 Bb1 Kd8 Kb8 Nd5 Bh7 Ne7 Bb1 Nxc8 Bf5 Ne7 Bg4 Nd5 Bh5 Nf6 Be2 Nxd7+ Ka8 Kc7 Bf1 Nf6 Bb5 Nd5 Bc6 Ne7 Be4 d7
 19	+0.65 	353883	0:00.12	Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Ne7 Ka8 Nd5 Kb8 Nf6 Bf3 Nxd7+ Kc8 Ke7 Be4 Nc5 Bf5 Ne4 Bd7 Ng5 Bg4 Nf7 Bd7 Kf6 Bh3 Ke5 Bd7 Ng5 Kd8 Nf3 Bg4 Ne1 Bh3 Kd5 Bd7 Kd4
 18	+1.76 	118611	0:00.04	Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Ne7 Ka8 Nd5 Bf3 Nf6 Kb8 Nxd7+ Kc8 Ke7 Be4 Nf6 Bf5 Nh5 Bd7 Ng3 Bh3 Ne4 Bd7 Nc5 Bh3 Kf6 Bd7 Ke5 Bc6 Ke6
 17	  0.00 	25971  	0:00.01	Kf6 Bb3 Kf5 Bc2+ Kf6
 16	  0.00 	19861  	0:00.01	Kf6 Bb3 Kf5 Bc2+ Kf6
 15	  0.00 	15610  	0:00.01	Kf6 Bb3 Kf5 Bc2+ Kf6
 14	  0.00 	12838  	0:00.01	Kf6 Bb3 Kf5 Bc2+ Kf6
 13	  0.00 	10677  	0:00.01	Kf6 Bb3 Kf5 Bc2+ Kf6
 12	  0.00 	8366    	0:00.00	Kf6 Bb3 Kf5 Bc2+ Kf6
 11	  0.00 	7116    	0:00.00	Kf6 Bb3 Kf5 Bc2+ Kf6
 10	  0.00 	5677    	0:00.00	Kf6 Bb3 Kf5 Bc2+ Kf6
  9	  0.00 	4738    	0:00.00	Kf6 Bb3 Kf5 Bc2+ Kf6
  8	  0.00 	3897    	0:00.00	Kf6 Bb3 Kf5 Bc2+ Kf6
  7	 -1.16 	2131    	0:00.00	Kf6 Bb3 Kf5 Bc2+ Ke5 Bd3 Kd4 Bb5
  6	 -1.13 	1485    	0:00.00	Kf6 Bb3 Kf5 Bc2+ Ke5 Bh7 Kd5
  5	 -1.34 	698      	0:00.00	Kf6 Bb3 Kf5 Bc4 Ke4
  4	 -1.28 	269      	0:00.00	Kf6 Bb3 Ke5 Be6
  3	 -1.31 	161      	0:00.00	Kf6 Bb3 Ke5
  2	 -1.56 	53        	0:00.00	Kf6 Bb3
  1	 -1.56 	16        	0:00.00	Kf6
  0	#
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