Bad eval with 7 men syzygy

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Eduard
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Bad eval with 7 men syzygy

Post by Eduard » Mon Feb 11, 2019 7:48 pm

Lc0 vs Stockfish (superfinal)



I see only 8 pieces, but the Bluefish (Stockfish) with 7 men Syzygy says -1,24. :roll:

Something needs to be improved here (please).

MikeB
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Re: Bad eval with 7 men syzygy

Post by MikeB » Mon Feb 11, 2019 8:09 pm

Eduard wrote:
Mon Feb 11, 2019 7:48 pm
Lc0 vs Stockfish (superfinal)



I see only 8 pieces, but the Bluefish (Stockfish) with 7 men Syzygy says -1,24. :roll:

Something needs to be improved here (please).
Were you looking for something more like this?

McCain-X1 with 7 man syzygy

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 52	 -0.32 	35.6G	12:37.83	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kd4 Bh7 Bc5 Ka1 Kd5 Bg8+ Kd6 Bc4 Ke7 Ba6 Kf6 Bd3 Bf8 Bh7 Be7 Kb1 g5 hxg6 Kg7 Ka2 Bc5 Kb3 a4+ Ka2 Kh8 Ka1 Bd6 Ka2 Bb4 Ka1 Kg7 Ka2 Bc5 Ka1 Bd6 Ka2 Kh6 Bg8 Bf8 
 51	 -0.32 	35.6G	12:37.69	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kd4 Bh7 Bc5 Ka1 Kd5 Bg8+ Kd6 Bc4 Ke7 Ba6 Kf6 Bd3 Bf8 Bh7 Be7 Kb1 g5 hxg6 Kg7 Ka2 Bc5 Kb3 a4+ Ka2 Kh8 Ka1 Bd6 Ka2 Bb4 Ka1 Kg7 Ka2 Bc5 Ka1 Bd6 Ka2 Kh6 Bg8 Bf8 
 50	 -0.32 	35.6G	12:37.58	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kd4 Bh7 Bc5 Ka1 Kd5 Bg8+ Kd6 Bc4 Ke7 Ba6 Kf6 Bd3 Bf8 Bh7 Be7 Kb1 g5 hxg6 Kg7 Ka2 Bc5 Kb3 a4+ Ka2 Kh8 Ka1 Bd6 Ka2 Bb4 Ka1 Kg7 Ka2 Bc5 Ka1 Be7 Kb1 
 49	 -0.32 	32.9G	11:38.90	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kf4 Bc2 Kg4 Bd1+ Kg5 Kb3 Kf6 Be2 Ke6 Bc4+ Kf5 Bf7 Kf4 Bg6 Kg4 Bf7 a2 Kxa2 a4 Bg6 a3 Bf7 Kg5 Kb3 Be7 Ka4 Kh4 Kb3 Bd6 Ka2 Bc5 Bg6 Kg5 Ka1 Kh6 Ka2 
 48	 -0.32!	32.1G	11:20.37	Be6! 
 48	 -0.38!	2.21G	0:53.62	Be6! 
 47	 -0.44 	1.06G	0:26.47	Be6 Bd6 Bg4 Kc3 Be6 Bb4 Bf5 Bf8 Bc8 Kb4 Be6 Bc5 Bd5 Bd6 Be6 Kc3 Bb3 Bf8 Bf7 Bc5 Be6 Kd4 Kb1 Bf8 Kc2 Ke5 Bh3 Kf6 Bg2 a4 Bd5 Bc5 Bc4 Kg5 Be2 Kh6 Bf3 Bd6 Be2 Bf8 Kb1 Kg5 Kc2 Kf4 Bb5 a2 Kb2 a1=Q+ Kxa1 
 46	 -0.44 	863.2M	0:21.27	Be6 Bd6 Bg4 Kc3 Be6 Bb4 Bf5 Bf8 Bc8 Kb4 Be6 Bc5 Bd5 Bd6 Be6 Kc3 Bd5 Be7 Ba8 Kd2 Kb3 Kd3 Bd5 Ke3 Ka2 Kd4 Bf3 Ke5 Kb1 Kf5 Ka2 a4 Bd1 Kg5 Bf3 Bd6 Bd1 Bc5 Kb1 Kh4 Be2 Bd6 Bf3 Kg5 Ka2 Kh6 Bd1 
 45	 -0.44 	835.1M	0:20.52	Be6 Bd6 Bg4 Kc3 Be6 Be7 Bd5 Kc2 Bf7 Kd3 Be6 Ke4 Bf7 Kf4 Bc4 Kg4 Bf7 Kg3 Bg6 Kf4 Be8 Ke5 Kb3 Bc5 Bd7 Ke4 Kc3 Kf4 Bb5 Kg5 Be2 a4 Kc2 Kh4 Kb1 Bf8 Ka2 Kg5 Bf3 Bc5 Bd1 Kh4 Kb1 Be7 Kc2 Bf6 Kb1 
 45	 -0.45!	828.7M	0:20.33	Be6! 
 44	 -0.51!	681.0M	0:16.38	Be6! 
 44	 -0.61!	451.5M	0:11.07	Be6! 
 44	 -0.67!	396.4M	0:09.75	Be6! 
 43	 -0.73!	347.0M	0:08.58	Be6! 
 42	 -0.79 	199.5M	0:05.08	Be6 Kc3 Bd5 Be7 Bb3 Kb4 Bd5 Bd6 Be6 Kc3 Bg4 Kd4 Be2 Ke4 Bd1 Kf5 Ba4 Kg5 Be8 a4 Bg6 Bc5 Be8 Kg4 Bg6 Kh4 Be8 Be7 Bf7 Bb4 Bg6 Bf8 Bf7 Kg5 Bg6 Bd6 Kb1 Kg4 Be8 Bc5 Ka2 Bb4 Bf7 
 41	 -0.79 	185.9M	0:04.71	Be6 Kc3 Bf7 Be7 Bb3 Kb4 Bd5 Bd6 Be6 Bf8 Bd5 Be7 Be6 Bd6 Ka1 Bf8 Ka2 a4 Bd7 Bd6 Bf5 Be7 Be4 Bg5 Bc6 Bf6 Bd5 Kc5 Be4 Bb2 Bc2 Kb4 Bd1 Bc1 Bc2 Bg5 Bh7 Bf6 Bf5 Bb2 Bd7 
 40	 -0.79 	184.8M	0:04.68	Be6 Kc3 Bf7 Be7 Bb3 Kb4 Bd5 Bd6 Be6 Bf8 Bd5 Be7 Be6 Bd6 Ka1 Bc5 Kb1 Be3 Ka2 a4 Bd7 Bc5 Bg4 Bf2 Bf3 Bg3 Bd5 Bd6 Kb1 Be7 Bf3 Bg5 Bd5 Be3 Ka2 Bc5 Bc6 Bd6 Bd5 Bg3 Be6 
 39	 -0.79 	183.3M	0:04.64	Be6 Kc3 Bf7 Be7 Bb3 Kb4 Bd5 Bd6 Be6 Bf8 Bd5 a4 Be4 Be7 Bc2 Bh4 Be4 Bf6 Bc6 Bb2 Be4 Be5 Bd3 Bf4 Be4 Be3 Bd5 Bc5 Be6 Bd4 Bh3 Be3 Bf5 Bd2 Be4 Bf4 Bd3 Bc1 Bh7 
 38	 -0.79 	180.0M	0:04.54	Be6 Kc3 Bd5 Be7 Bb3 Kb4 Bd5 Bd8 Bg2 Bf6 Be4 Bd4 Bd5 Bb6 Bb3 Be3 Be6 Bg1 Bd5 Bd4 Kb1 Bc5 Kc2 a4 Bg8 Bd4 Ba2 Bb2 Kb1 Kc5 Kc2 Bf6 Be6 Bd8 Bg8 Bg5 Ba2 Be3 Bf7 
 37	 -0.85 	132.5M	0:03.39	Be6 Kc3 Bd5 Be7 Bb3 Kb4 Bd5 Bf8 Bc6 Bc5 Bd5 Bf2 Bf7 Ba7 Bb3 Bb8 Be6 Bf4 Bd5 Bc7 Bh1 Bd6 Be4 Kc4 Bc2 Kc3 Bg6 Be7 Ka1 Kb4 Ka2 a4 Bd3 Bd6 Bf5 Be5 Bh7 
 36	 -0.85 	126.8M	0:03.24	Be6 Kc3 Bf7 Kb4 Bd5 Bd4 Bb3 Be3 Bc2 Bg5 Bg6 Bf6 Be4 Bh4 Bd3 Be7 Kb1 Bf8 Bc2 Kc4 Ka1 Bc5 Bg6 Kc3 Ka2 Bd6 Bf5 Kb4 Be6 Be7 Bd7 a4 Bc6 Bd6 Be4 Kc3 Ka1 
 35	 -0.86 	29.1M  	0:00.91	Be6 Kc3 Bf7 Kb4 Bd5 Bd4 Bb3 Be3 Bc2 Bg5 Bg6 Bf6 Be4 Bh4 Bd3 Bd8 Ba6 Be7 Bd3 Bf8 Be2 Kc3 Bg4 Bc5 Be6 Bd6 Bg4 Kb4 Be6 Be7 Bf7 a4 Bd5 Kc5 Be6 
 34	 -0.86 	28.8M  	0:00.90	Be6 Kc3 Bf7 Kb4 Bd5 Bd4 Bb3 Be3 Bc2 Bg5 Bg6 Bf6 Be4 Bh4 Bd3 Bd8 Ba6 Be7 Bd3 Bf8 Be2 Kc3 Bg4 Bd6 Be6 Be7 Bf5 Kc4 Be6+ Kb4 Bf7 a4 Bd5 Bd6 Be6 
 33	 -0.86 	27.0M  	0:00.86	Be6 Kc3 Bf7 Kb4 Bd5 Bd4 Bb3 Be3 Bc2 Bg5 Bg6 Bf6 Be4 Bb2 Bd5 Bc1 Ka1 Be3 Be4 Bd4+ Kb1 Bf2 Bc2 Bg3 Be4 Bh4 Bf3 Bf2 Be2 a4 Bd3 Bc5 Bc2 Bd4 
 32	 -0.86 	10.4M  	0:00.38	Be6 Kc3 Bd5 Be7 Be4 Bd6 Bb7 Kb4 Bd5 Bb8 Be6 Bf4 Bd5 a4 Bc6 Bg5 Bd5 Bc1 Bc6 Bb2 Be4 Bf6 Bd5 Bg5 Be4 Be3 Bc6 Bd4 Be4 Bc5 Bd5 
 31	 -0.92 	5.62M  	0:00.23	Be6 Kc3 Bd5 Bd6 Bb3 Kb4 Bd5 Be5 Bf7 Bf6 Bd5 Bd4 Be6 Bb6 Bd5 Bg1 Be4 Bf2 Bc2 Bc5 Bd1 Bf8 Bb3 Be7 Bd5 Bd6 Be4 Kc4 Bc2 Kd5 Bd1 
 30	 -0.92 	4.63M  	0:00.20	Be6 Kc3 Bd5 a4 Bf7 Bf8 Bg6 Kb4 Bd3 Bc5 Be4 Bd6 Bc2 Bf4 Be4 Bg5 Bd5 Bf6 Be6 Bb2 Bf7 Be5 Bd5 Bd6 Be4 Bc5 Bc6 Be7 Bf3 Kc3 
 29	 -0.92 	4.38M  	0:00.19	Be6 Kc3 Bd5 a4 Bf7 Bf8 Bg6 Kb4 Bd3 Bc5 Be4 Be7 Bc6 Bg5 Bd5 Bf4 Be6 Bg3 Bd5 Be5 Bb7 Bd6 Be4 Kc3 Bg6 Bf8 Be4 Be7 Bd5 
 28	 -0.98 	1.31M  	0:00.06	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bg1 Be6 Bd4 Bd5 Be3 Bf3 Bc5 Bd5 Kc3 Be6 Be7 Bf7 Bd6 Bb3 Kd4 Bc2 Kc4 Be4 Kb4 Bd5 Kc5 
 27	 -0.98 	1.19M  	0:00.05	Be6 Kc3 Bd5 Kb4 Be6 Bd6 Bd5 Be7 Bg8 Bg5 Bd5 Bh4 Bb7 Bf6 Bd5 Bb2 Be4 Bd4 Bc2 Be5 Bg6 Bf6 Be4 a4 Bd5 Be7 Bf7 
 26	 -0.98 	839499	0:00.04	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bf4 Be6 Bg5 Bf5 Bh4 Be4 Be7 Kb1 Kc4 Ka2 Bd6 Bc6 Kc3 Be4 Kb4 Bf5 Kc4 Be6+ Kc3 Bf7 
 25	 -0.98 	750890	0:00.03	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bg6 Bd4 Bf7 Bc5 Bd5 Bd6 Be4 Be7 Bg6 Kc3 Be4 Kc4 Bc2 Bd6 Be4 Bc5 Bf3 Be7 Bd1 Kc3 
 24	 -0.98 	634089	0:00.03	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bg6 Bd4 Bf7 Bc5 Bd5 Be7 Bg8 Bg5 Bf7 Bd8 Bd5 Bh4 Be4 Bg5 Bg6 Be7 Bf7 Kc3 Bd5 
 23	 -0.98 	601113	0:00.03	Be6 Kc3 Bd5 Kb4 Bf7 Bd6 Bg6 Kc4 Bf7+ Kc3 Be6 Kb4 Bf7 Bc5 Bd5 Kc3 Bb7 Kc4 Bf3 Kd4 Bh1 Ke5 Bf3 Kf4 
 22	 -0.98 	546058	0:00.03	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bg6 Bd4 Bf7 Bc5 Bd5 Be7 Bg2 Kc4 Bc6 Bc5 Bb7 Bd6 Bc6 Be7 Be4 Bb4 Bg2 
 21	 -0.98 	511407	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bb2 Bf7 Be5 Be6 Bg3 Bd5 Bd6 Be4 Kc4 Bg6 Kd4 Bc2 
 20	 -0.98 	424943	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bc2 Bh6 Be4 Bg5 Bd5 Bh4 Be6 Bg3 Bg8 Bf2 
 19	 -0.98 	394638	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bf7 Bb8 Bd5 Bg3 Be6 Bf2 Bg8 Bh4 Bf7 
 18	 -0.98 	381395	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bf7 Bb8 Bd5 Bg3 Be6 Bf2 Bg8 Bh4 
 17	 -0.98 	372707	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bf7 Bb8 Bd5 Bg3 Be6 Bf2 Bg8 
 16	 -0.98 	365614	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bf7 Bb8 Bd5 Bg3 Be6 Bf2 
 15	 -0.98 	357756	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bf7 Bb8 Bd5 Bg3 Be6 
 14	 -0.98 	352395	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bf7 Bb8 Bd5 Be5 
 13	 -0.98 	346413	0:00.02	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bd5 Bc1 Bb3 Bf4 Bf7 Bb8 Bd5 
 12	 -0.98 	283168	0:00.02	Be6 Bd6 Kb3 Ke5 Bg4 Ke4 Be2 Kf4 Bc4 Kg5 Be2 Kh4 Bd1 
 11	 -1.02 	88556  	0:00.01	Be6 Bd6 Kb3 Ke5 Bf7 Kf5 Bg6+ Kg4 Bf7 Kh4 h6 gxh6 
 10	 -1.05 	66793  	0:00.01	Be6 Kc3 Bd5 Kb4 Bf7 Be3 Bb3 Bc1 Bf7 a4 
  9	 -1.00 	53238  	0:00.01	Be6 Kc3 Bd5 Kb4 Bb3 Be3 Bd5 Bd4 
  8	 -1.09 	29732  	0:00.01	Be6 Kc3 Bd5 Bd6 Be6 Kb4 Bd5 Be5 
  7	 -1.09 	22946  	0:00.01	Be6 Kc3 Bd5 Bd6 Be6 Kb4 Bd5 
  6	 -1.09 	19142  	0:00.01	Be6 Kc3 Bd5 Kb4 Be4 
  5	 -1.11 	14698  	0:00.01	Be6 Kc3 Bd5 Kb4 Be4 
  4	 -1.04 	11590  	0:00.01	Be6 Kc3 Bf7 a4 
  3	 -1.00 	4739    	0:00.00	Be6 Kc3 Bb3 
  2	 -1.11 	2745    	0:00.00	Bb3 Kc3 
  1	 -0.94 	1126    	0:00.00	Bc6 
  0	# 
McCain loses 5 or 10 Elo to incorporate some of these ideas - - of course when you have an engine rated 3400 plus, as a user ( not a programmer) , do you really care about 5 or 10 Elo? , maybe or maybe not, - it's a tradeoff and there is no right or wrong answer, it's matter of personal preference..

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Eduard
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Re: Bad eval with 7 men syzygy

Post by Eduard » Mon Feb 11, 2019 8:30 pm

Eval was live at TCEC to see. Stockfish (Bluefish) runs on 176 Threads and 7-men Syzyzy in the analysis mode. In my opinion, eval should be clearly below 1.

MikeB
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Re: Bad eval with 7 men syzygy

Post by MikeB » Mon Feb 11, 2019 8:58 pm

Eduard wrote:
Mon Feb 11, 2019 8:30 pm
Eval was live at TCEC to see. Stockfish (Bluefish) runs on 176 Threads and 7-men Syzyzy in the analysis mode. In my opinion, eval should be clearly below 1.
It is believed by many that current Stockfish over evaluates any position relative to how most humans and and many other top engines by a range of 30% to 40%. So in that sense, the SF eval you are seeing is consistent with that opinion.

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Eduard
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Re: Bad eval with 7 men syzygy

Post by Eduard » Mon Feb 11, 2019 9:09 pm

It was funny to see (on the graphic) how the eval of about 1 in a move fell to zero at 7 pieces. :)

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Re: Bad eval with 7 men syzygy

Post by MikeB » Mon Feb 11, 2019 9:51 pm

Eduard wrote:
Mon Feb 11, 2019 9:09 pm
It was funny to see (on the graphic) how the eval of about 1 in a move fell to zero at 7 pieces. :)
Left McCain running to simulate something on 128 cores.

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 58	 -0.13 	294.1G	1:39:30	Be6 Kd3 Bd7 Bb4 Bc6 Be7 Bd5 Kd4 Bc6 Bf8 Ba4 Kc3 Bb5 Kd2 Bd7 Bb4 Ba4 Bc5 Bb5 Be7 Ba4 Ke3 Bd1 Bf8 Kb1 Kd2 Bb3 Kc3 Bf7 Kb4 Kc2 a4 Be6 Be7 Bd5 Bh4 Be6 Bf2 Bd5 Bd4 Ba2 Ba7 Be6 Bg1 Ba2 Bd4 Kb1 Bc3 Be6 a2+ Bxa2 Kc5 Kc2 Kd4 Bf7 Ba5 Be 
 57	 -0.13 	291.9G	1:38:43	Be6 Kd3 Bd7 Bb4 Bc6 Be7 Bd5 Kd4 Bc6 Bf8 Ba4 Kc3 Bb5 Kd2 Bd7 Bb4 Ba4 Bc5 Bb5 Bd6 Bd7 Bf8 Kb3 Bc5 Be6 Bd6 Bc4 a2 Kxa2 Kc3 Bd5 a4 Bc6 Kb4 Bd7 Be7 Kb1 Bg5 Be6 Kc3 Ba2 Bd8 Kc1 Bf6 Bd5 Bd4 Bc6 Kb4 Bd5 Kc5 Bf7 Kd6 Bc4 a3 Kb1 Be5 Kc2  
 56	 -0.13!	288.7G	1:37:33	Be6! 
 55	 -0.19!	185.1G	1:02:26	Be6! 
 54	 -0.25 	65.9G	22:50.12	Be6 Bd6 Bd7 Ke3 Be8 Bf8 Bd7 Kd2 Be6 Be7 Bd7 Bb4 Bb5 Bc5 Bd7 Be7 Be6 Ke3 Bf7 Kd4 Bb3 Ke5 Bc2 Bc5 Bh7 Bf8 Bc2 Be7 Ka1 Kd4 Bd1 a2 Bb3 Bg5 Kxa2 Bc1 Kb1 Kc3 Ka2 Kb4 Be6 Bg5 Bd5 a4 Be6 a3 Bd7 Be3 Bg4 Bc1 Bd7 Kc3 Bc6 Kd4 Kb3 
 53	 -0.25!	65.0G	22:29.03	Be6! 
 52	 -0.32 	35.6G	12:37.83	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kd4 Bh7 Bc5 Ka1 Kd5 Bg8+ Kd6 Bc4 Ke7 Ba6 Kf6 Bd3 Bf8 Bh7 Be7 Kb1 g5 hxg6 Kg7 Ka2 Bc5 Kb3 a4+ Ka2 Kh8 Ka1 Bd6 Ka2 Bb4 Ka1 Kg7 Ka2 Bc5 Ka1 Bd6 Ka2 Kh6 Bg8 Bf8 
 51	 -0.32 	35.6G	12:37.69	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kd4 Bh7 Bc5 Ka1 Kd5 Bg8+ Kd6 Bc4 Ke7 Ba6 Kf6 Bd3 Bf8 Bh7 Be7 Kb1 g5 hxg6 Kg7 Ka2 Bc5 Kb3 a4+ Ka2 Kh8 Ka1 Bd6 Ka2 Bb4 Ka1 Kg7 Ka2 Bc5 Ka1 Bd6 Ka2 Kh6 Bg8 Bf8 
 50	 -0.32 	35.6G	12:37.58	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kd4 Bh7 Bc5 Ka1 Kd5 Bg8+ Kd6 Bc4 Ke7 Ba6 Kf6 Bd3 Bf8 Bh7 Be7 Kb1 g5 hxg6 Kg7 Ka2 Bc5 Kb3 a4+ Ka2 Kh8 Ka1 Bd6 Ka2 Bb4 Ka1 Kg7 Ka2 Bc5 Ka1 Be7 Kb1 
 49	 -0.32 	32.9G	11:38.90	Be6 Kc3 Bd7 Bd6 Bf5 Be7 Bd7 Kc2 Bf5+ Kd2 Kb3 Ke3 Bg6 Bb4 Ka2 Kf4 Bc2 Kg4 Bd1+ Kg5 Kb3 Kf6 Be2 Ke6 Bc4+ Kf5 Bf7 Kf4 Bg6 Kg4 Bf7 a2 Kxa2 a4 Bg6 a3 Bf7 Kg5 Kb3 Be7 Ka4 Kh4 Kb3 Bd6 Ka2 Bc5 Bg6 Kg5 Ka1 Kh6 Ka2 
 48	 -0.32!	32.1G	11:20.37	Be6! 
 48	 -0.38!	2.21G	0:53.62	Be6! 
 47	 -0.44 	1.06G	0:26.47	Be6 Bd6 Bg4 Kc3 Be6 Bb4 Bf5 Bf8 Bc8 Kb4 Be6 Bc5 Bd5 Bd6 Be6 Kc3 Bb3 Bf8 Bf7 Bc5 Be6 Kd4 Kb1 Bf8 Kc2 Ke5 Bh3 Kf6 Bg2 a4 Bd5 Bc5 Bc4 Kg5 Be2 Kh6 Bf3 Bd6 Be2 Bf8 Kb1 Kg5 Kc2 Kf4 Bb5 a2 Kb2 a1=Q+ Kxa1 
 46	 -0.44 	863.2M	0:21.27	Be6 Bd6 Bg4 Kc3 Be6 Bb4 Bf5 Bf8 Bc8 Kb4 Be6 Bc5 Bd5 Bd6 Be6 Kc3 Bd5 Be7 Ba8 Kd2 Kb3 Kd3 Bd5 Ke3 Ka2 Kd4 Bf3 Ke5 Kb1 Kf5 Ka2 a4 Bd1 Kg5 Bf3 Bd6 Bd1 Bc5 Kb1 Kh4 Be2 Bd6 Bf3 Kg5 Ka2 Kh6 Bd1 

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Eduard
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Re: Bad eval with 7 men syzygy

Post by Eduard » Mon Feb 11, 2019 10:45 pm

Thanks!

Here is a analysis of McCain X1 arm8 on my Android Smartphone with only 6 men syzygy (see Attachment).

Thank You for this nice Android Engine, I found it in the MZ Chess Forum.
Attachments
Screenshot_20190211-233730_1.jpg
Screenshot_20190211-233730_1.jpg (101.87 KiB) Viewed 1126 times
Last edited by Eduard on Mon Feb 11, 2019 10:48 pm, edited 1 time in total.

MikeB
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Re: Bad eval with 7 men syzygy

Post by MikeB » Mon Feb 11, 2019 10:48 pm

Eduard wrote:
Mon Feb 11, 2019 10:45 pm
Thanks!

Here is a analysis of McCane X1 arm8 on my Android Smartphone with only 6 men syzygy (see Attachment).

Thank You for this nice Android Engine, I found it in the MZ Chess Forum.
That's cool - that's what open source is all about.

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Re: Bad eval with 7 men syzygy

Post by PK » Tue Feb 12, 2019 7:46 am

I vaguely recall Tord Romastad's post on fishcooking list where he explained that overvaluing drawn positions is actually good for modern selective search. Getting "good drawn position" might indicate that there is some conversion to superior ending along the way, but it has been pruned one way or the other. His post was a detailed response to user's query about some missing or deleted endgame scaling rule.

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Re: Bad eval with 7 men syzygy

Post by Michel » Tue Feb 12, 2019 11:21 am

PK wrote:
Tue Feb 12, 2019 7:46 am
I vaguely recall Tord Romastad's post on fishcooking list where he explained that overvaluing drawn positions is actually good for modern selective search. Getting "good drawn position" might indicate that there is some conversion to superior ending along the way, but it has been pruned one way or the other. His post was a detailed response to user's query about some missing or deleted endgame scaling rule.
This is actually AB search emulating (A0-style) MCTS search. I.e. "this position is draw but some similar looking positions are not draw, so let's reflect that in our evaluation".
Ideas=science. Simplification=engineering.
Without ideas there is nothing to simplify.

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