New Stockfish contempt

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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: New Stockfish contempt

Post by MikeB »

mjlef wrote:It is great that Stockfish has a better form of Contempt now. But switching sides without reversing the Contempt sign is going to fill the hash with contradictory information if it applies contempt to the side to move. Komodo turns off Contempt in analysis mode, unless the "White Contempt" is on. Then it uses Contempt in regular play and analysis, but applies the Contempt number .com white's point of view, switching it as needed for black. This lets you use it in analysis mode without switching analysis side messing up the hash.
+1 - there is debate right now on the SF Github page about this very topic. Hopefully they make the right decision with SF 9. It's kind of interesting those more involved with the programming aspect of SF are in direct conflict with those who have more experience with using an engine for analysis.
It's not only the switching back and forth but the analysis from black's perspective is messed as well as it delays seeing black's winning move Ne5! below by almost two minutes..
[d]2r5/8/3k2np/p2p2p1/Pp4P1/1P1N3P/2Pb1P2/3B1RK1 b - - 9 56 ; bm Ne5
current dev-SF, with contempt 20 ( default), single core, hash 64:

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 48	 -0.47!	333.7M	3:32.37	Ne5! 
 48	 -0.32!	279.4M	2:57.04	Ne5! 
 48	 -0.20!	265.3M	2:48.25	Ne5! 
 48	 -0.13!	245.6M	2:35.79	Ne5! 
 47	 -0.05 	189.3M	2:00.42	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Be5+ Kg1 Rc8 Kh1 Ng6 Re1 Bd4 Kg2 Rh8 Kg3 Rf8 Kg2 Nh4+ Kg1 Rc8 Kf1 Bf6 Kg1 Ng6 Rf1 Bd4 
 46	 -0.05 	160.3M	1:42.05	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Be5+ Kg1 Rc8 Kh1 Ng6 Kg2 Rf8 Re1 Nh4+ Kg1 Bd4 Rf1 Rc8 Kh2 Ng6 Kg3 Rc3 Kg2 Ne5 Nxe5 Kxe5 
 45	 -0.05 	131.6M	1:24.03	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Be5+ Kg1 Rc8 Kh1 Rh8 Re1 Bg7 Rf1 Ng6 Kg2 Rf8 Re1 Bc3 Rf1 Rf7 Be2 Bd4 Bd1 Rf8 
 44	 -0.05 	93.8M  	0:59.91	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg3 Rc8 Re1 Bc3 Rf1 Be5+ Kg2 Bf4 Re1 Nh4+ Kh1 Bd2 Rf1 Rf8 Kg1 Re8 Kh2 Ng6 
 43	 -0.05 	77.2M  	0:49.40	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg2 Be5 Be2 Nh4+ Kg1 Bd4 Bd1 Rc8 Re1 Bc3 Rf1 Be5 Re1 Bd4 Kh2 Bc3 Re2 
 42	 -0.05 	65.7M  	0:42.06	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg2 Be5 Be2 Nh4+ Kg1 Bd4 Rd1 Ng6 Kf1 Bb6 Kg1 Nh4 Kf1 Rf7 Re1 Bd4 
 41	 -0.05 	51.7M  	0:33.36	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg2 Be5 Be2 Nh4+ Kg1 Rc8 Bd1 Ng6 Kg2 Rc3 Re1 Nf4+ Nxf4 Bxf4 Re8 
 40	 -0.05 	42.9M  	0:27.96	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg2 Be5 Be2 Nh4+ Kg1 Rc8 Bd1 Bd4 Kh1 Ng6 Kg2 Re8 f4 Nh4+ Kh2 
 39	 -0.05 	38.4M  	0:25.02	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg2 Be5 Be2 Rc8 Bd1 Nh4+ Kg1 Bd4 Kh1 Ng6 Kg2 Rf8 Kg3 
 38	 -0.05 	24.3M  	0:15.64	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg2 Be5 Be2 Rc8 Bd1 Nh4+ Kh1 Rf8 Kg1 Bc3 f4 Bd4+ Kh1 
 37	 -0.05 	20.5M  	0:13.23	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Ng6 Kg2 Bg7 Re1 Bc3 Rf1 Rf7 Be2 Bd4 Bd1 Rf8 
 36	 -0.05 	13.8M  	0:08.97	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Rf8 Be2 Bd4 Bd1 Be5+ Kg1 Rc8 Re1 Bd4 Rf1 Ng6 Kg2 Ne5 Nxe5 Bxe5 
 35	 -0.05 	10.6M  	0:06.76	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Nh4 Kh2 Re8 Kg1 Bc3 Kh2 Ng6 Kg2 Bd2 Kg3 Rc8 Kg2 Bf4 Kg1 Rf8 Kh1 Nh4 Be2 Bd2 
 34	 -0.05 	8.37M  	0:05.36	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Rc7 Kg2 Ke6 Rg1 Kf6 Kf1 Rc3 Kg2 Nh4+ Kh2 d4 Rh1 Ke6 Rf1 Ng6 Rh1 Nf4 Nxf4+ gxf4 Kg2 
 33	 -0.05 	6.83M  	0:04.35	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Rc7 Kg2 Ke6 Rg1 Kf6 Kf1 Rc3 Kg2 d4 Rh1 Nh4+ Kf1 Rc8 Ke2 Bc3 f4 gxf4 Nxf4 
 32	 -0.05 	5.64M  	0:03.58	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Rc7 Kg2 Ke6 Rg1 Kf6 Kf1 Rc3 Kg2 d4 Rh1 Nh4+ Kf1 Rc8 Ke2 Bc3 f4 gxf4 
 31	 -0.05 	4.60M  	0:02.96	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Rc7 Kg2 Ke6 Rg1 Nh4+ Kh2 Rc3 Rf1 Ng6 Kg2 Rc8 Rh1 Kf6 Rg1 Rc3 Rf1 
 30	 -0.05 	4.12M  	0:02.66	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Rc7 Kg2 Rc3 Kg1 Ne5 Nxe5 Kxe5 Kg2 d4 Rh1 d3 cxd3 Rxd3 h4 gxh4 Rxh4 Bg5 
 29	 -0.05 	2.59M  	0:01.64	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Rc7 Kg2 Rc3 Kg1 Ne5 Nxe5 Kxe5 Kg2 d4 Rh1 d3 cxd3 Rxd3 h4 
 28	 -0.05 	2.21M  	0:01.41	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Re8 Kg2 Bf4 Kg1 Rf8 Kh1 Nh4 Be2 Bd2 Kh2 Ng6 Kg2 
 27	 -0.05 	1.93M  	0:01.24	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Re8 Kg2 Bf4 Kg1 Rf8 Kh1 Ne5 Nxe5 Bxe5 Kg2 Rc8 
 26	 -0.05 	1.66M  	0:01.08	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Re8 Kg2 Bf4 Kg1 Rf8 Kh1 Ne5 Nxe5 Kxe5 Kg2 
 25	 -0.05 	1.40M  	0:00.92	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Nh4+ Kh1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh1 Re8 Kg2 Bf4 Re1 Rf8 Be2 Nh4+ Kh1 Bd2 Rf1 Re8 
 24	 -0.06 	992351	0:00.67	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Rb8 Rf1 Rf8 Re1 Nh4+ Kg1 Bc3 Rf1 Ng6 Kg2 Bd2 Kh2 Rc8 Kh1 Nf4 Nxf4 gxf4 Kg2 
 23	 -0.08 	617304	0:00.43	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Kg1 Re8 Kg2 Rf8 Be2 Rc8 Bd1 Rc7 Kg3 Bf4+ Kg2 Nh4+ Kh1 
 22	 -0.08 	529689	0:00.37	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Kg1 Rc7 Kg2 Rc3 Rg1 Rc8 Rf1 Rc7 Kg3 Bf4+ Kg2 Nh4+ Kh1 Ng6 
 21	 -0.08 	454483	0:00.31	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Kg1 Rc7 Kg2 Rc3 Rg1 Rc8 Rf1 Rf8 Be2 Bc3 Bd1 Nh4+ Kh1 
 20	 -0.08 	415416	0:00.29	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Kg1 Rc7 Kg2 Rc3 Rg1 Ne5 Nxe5 Kxe5 Rh1 Rc8 h4 
 19	 -0.08 	387478	0:00.27	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Kg1 Rc7 Kg2 Rc3 Rg1 Ne5 Nxe5 Kxe5 Rh1 Rc8 h4 
 18	 -0.08 	353981	0:00.24	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Kg1 Rc7 Kg2 Rc3 Rg1 Ne5 Nxe5 Kxe5 Rh1 
 17	 -0.08 	317182	0:00.22	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Rh1 Rc7 Rf1 Rc3 Rg1 Ne5 Nxe5 Kxe5 Rh1 
 16	 -0.08 	261502	0:00.19	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bc3 Rf1 Bd2 Rh1 Rc7 Rf1 Rc3 Rg1 Ne5 Nxe5 Kxe5 
 15	 -0.15 	191232	0:00.14	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bd4 Rf1 Rf8 Re1 Bb6 Rf1 Nf4+ Nxf4 Rxf4 Be2 
 14	 -0.23 	157858	0:00.12	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bd4 Re2 Rf8 Re1 Bb6 Rf1 Nf4+ Nxf4 Rxf4 Be2 
 13	 -0.24 	136751	0:00.10	Rf8 Kg2 Bc3 Be2 Be5 Bd1 Rc8 Re1 Bd4 Re2 Ne5 Nxe5 Bxe5 
 12	 -0.23 	112443	0:00.08	Bf4 Re1 Be5 Re2 Bd4 Rd2 Bc3 Re2 Ne5 Nxe5 Bxe5 Kg2 
 11	 -0.27 	74848  	0:00.04	Rc7 Kg2 Rf7 Be2 Bc3 Bd1 Rf8 Be2 Bd4 Rd1 Ne5 Rf1 Nxd3 
 10	 -0.14 	31645  	0:00.02	Rc3 Kg2 Rc7 Rh1 Rc6 Rf1 Rc3 Rh1 Rc7 Rf1 Nf4+ Nxf4 
  9	 -0.42 	7282    	0:00.01	Rc3 Kg2 Ne5 Nxe5 Kxe5 Rh1 Rc8 Rg1 Rc3 
  8	 -0.48 	3596    	0:00.00	Ne5 Be2 Rc3 Nxe5 Kxe5 Kg2 Rxc2 Rd1 
  7	 -0.43 	2141    	0:00.00	Ne5 Nxe5 Kxe5 Kg2 Kd4 Rh1 Rc3 
  6	 -0.53 	1783    	0:00.00	Ne5 Nxe5 Kxe5 Kg2 Kd4 Rh1 
  5	 -0.45 	1159    	0:00.00	Rc7 Kh2 Ne5 Nxe5 Kxe5 
  4	 -0.39 	488      	0:00.00	Nf4 Nxf4 Bxf4 Kg2 
  3	 -0.50 	263      	0:00.00	Ne5 Nxe5 Kxe5 
  2	 -0.50 	158      	0:00.00	Nh4 f3 
  1	 -0.45 	37        	0:00.00	Nf4 Nxf4 Bxf4

current dev-SF, with contempt 0 ( has to be manually set), single core, hash 64:

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 41	 -0.67!	83.9M  	0:53.96	Ne5! 
 41	 -0.45!	69.4M  	0:44.38	Ne5! 
 41	 -0.29!	54.7M  	0:34.81	Ne5! 
 41	 -0.18!	51.1M  	0:32.42	Ne5! 
 41	 -0.10!	47.1M  	0:29.86	Ne5! 
 40	 -0.03 	33.2M  	0:20.95	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Rh1 Nh4+ Kg3 Rc3 Kh2 Rc7 Rg1 Ng6 Kg3 Rf7 Kg2 Re7 Rh1 Re8 Rf1 Rf8 Rh1 Nh4+ Kh2 Rf7 Rf1 Ng6 Kh1 Ne5 Nxe5 Kxe5 
 39	 -0.03 	25.8M  	0:16.34	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Rh1 Nh4+ Kg3 Rc3 Kh2 Rc7 Rg1 Ng6 Kg3 Rf7 Kg2 Re7 Rh1 Ra7 Rg1 Rf7 Rf1 Rf8 Rh1 Bc3 Rf1 Rf6 Be2 Rf8 
 38	 -0.03 	18.7M  	0:11.83	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Rh1 Nh4+ Kg3 Rc3 Kh2 Rc7 Rg1 Ng6 Kg3 Rf7 Kg2 Re7 Rh1 Ra7 Rg1 Rf7 Rf1 Rf8 Kg1 Nh4 Kh1 Re8 Kg1 
 37	 -0.03 	15.4M  	0:09.70	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Rh1 Nh4+ Kg3 Rc3 Kh2 Rc7 Rg1 Ng6 Kg3 Rf7 Kg2 Re7 Rh1 Ra7 Rg1 Rf7 Rf1 Rf8 Be2 Rc8 Bd1 Re8 Kh2 
 36	 -0.03 	12.5M  	0:07.95	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Rh1 Nh4+ Kg3 Re8 Rg1 Ng6 Kg2 Re7 Rh1 Ra7 Rg1 Rf7 Rf1 Rf8 Be2 Rc8 Bd1 Rc3 Kh2 Ne5 
 35	 -0.03 	9.86M  	0:06.19	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Rh1 Nh4+ Kg3 Re8 Rg1 Ng6 Kg2 Re7 Rh1 Ra7 Rg1 Rf7 Rf1 Rf8 Kg1 Bc3 Kg2 Nh4+ Kh2 Rf7 Kg3 
 34	 -0.03 	7.59M  	0:04.68	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Rh1 Re8 Rf1 Rf8 Kg1 Bc3 Kg2 Nh4+ Kh1 Bd2 Kg1 Rf7 Kh2 Ng6 Kg1 Re7 Kg2 Rc7 Rh1 
 33	 -0.03 	6.28M  	0:03.88	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Kg3 Re8 Kh2 Ra8 Kg2 Rf8 Kg1 Bc3 Kg2 Rf7 Be2 Bd4 Bd1 Rf6 Re1 Rf8 Rf1 
 32	 -0.03 	4.57M  	0:02.73	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Kg3 Re8 Kh2 Ra8 Kg2 Rf8 Kg1 Bc3 Kg2 Be5 Be2 Nh4+ Kh1 Bc3 Bd1 Bd2 Kg1 
 31	 -0.03 	3.69M  	0:02.19	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rc8 Kg3 Re8 Kh2 Ra8 Kg2 Rf8 Kg1 Bc3 Kg2 Be5 Be2 Rc8 Bd1 Nh4+ Kh1 Rf8 
 30	 -0.03 	2.50M  	0:01.51	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rf6 Rg1 Bc3 Rf1 Rf7 Be2 Rf8 Bd1 Bd4 Re1 Rc8 Rf1 Ne5 Nxe5 Kxe5 
 29	 -0.03 	1.92M  	0:01.18	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rf6 Rg1 Bc3 Rf1 Rf7 Be2 Rf8 Bd1 Bd2 Kg1 Nh4 Kh1 Rf7 Kh2 
 28	 -0.03 	1.61M  	0:01.01	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rf6 Rg1 Bc3 Rf1 Rf7 Be2 Rf8 Bd1 Nh4+ Kh1 Re8 Kg1 Re7 f4 Re3 
 27	 -0.03 	1.20M  	0:00.74	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rf6 Rg1 Bc3 Rf1 Rf7 Be2 Bd2 Bd1 Rf8 Kg1 Re8 Kh2 
 26	 -0.03 	989800	0:00.60	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rf6 Rg1 Bc3 Rf1 Rf7 Be2 Rf8 Kh1 Rc8 Bd1 Rc7 
 25	 -0.03 	863622	0:00.53	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rf6 Rg1 Bc3 Rf1 Rf7 Be2 Rf8 Bd1 Bd2 Kg1 
 24	 -0.03 	732843	0:00.46	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Bc3 Kg2 Rf8 Rh1 Bd2 Rf1 Rf6 Rg1 Bc3 Rf1 Rf7 Be2 Rf8 Bd1 Bd2 
 23	 -0.03 	648211	0:00.41	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Rf6 Kg2 Rf8 Kg1 Rc8 Kh2 Bc3 Kg2 Rf8 Rh1 Be5 Rf1 Bd4 Re1 Nh4+ Kg3 
 22	 -0.03 	580541	0:00.37	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Rf6 Kg2 Rf8 Kg1 Rc8 Kh2 Ne5 Nxe5 Kxe5 Kg2 Kf4 Rh1 Bc3 h4 
 21	 -0.03 	511468	0:00.33	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Rf6 Kg2 Rf8 Kg1 Rc8 Kh2 Ne5 Nxe5 Kxe5 Kg2 Kf4 Rh1 
 20	 -0.03 	474001	0:00.31	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Rf6 Kg2 Rf8 Kg1 Rc8 Kh2 Ne5 Nxe5 Kxe5 Kg2 Kf4 
 19	 -0.03 	425273	0:00.28	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Rf6 Kg2 Rf8 Kg1 Rc8 Kh2 Ne5 Nxe5 Kxe5 Kg2 
 18	 -0.03 	394661	0:00.26	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Rf7 Kh2 Rf6 Kg3 Bc3 Bf3 Rf7 Bg2 Bd4 Re1 Ne5 
 17	 -0.03 	347362	0:00.23	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Re7 Kh1 Bc3 Kg2 Rf7 Be2 Bd4 Re1 Ne5 Rf1 
 16	 -0.05 	265621	0:00.17	Rc7 Kg2 Re7 Kg1 Ra7 Bf3 Rc7 Bd1 Re7 Kh1 Ra7 Kg1 Ne5 Nxe5 Kxe5 Bf3 Rc7 
 15	 -0.08 	233689	0:00.15	Rc7 Kg2 Re7 Kg1 Rf7 Kh2 Bc3 Kg2 Bd4 Re1 Rf8 Be2 Ne5 Nxe5 Rxf2+ Kg3 Kxe5 
 14	 -0.11 	165049	0:00.11	Rc7 Kg2 Re7 Rh1 Rf7 Rf1 Rf8 Rg1 Bc3 Be2 Rc8 Bd1 Ne7 Rh1 
 13	 -0.16 	131792	0:00.09	Rc7 Kg2 Re7 Kg3 Rf7 Rg1 Bc3 Be2 Rc7 Bd1 Be5+ Nxe5 Kxe5 
 12	 -0.10 	104889	0:00.07	Rf8 Kg2 Bc3 Be2 Bd4 Re1 Ne5 Nxe5 Rxf2+ Kg3 Kxe5 Bf3+ Kd6 Re8 Rxc2 
 11	 -0.15 	65030  	0:00.05	Rc3 Kh2 d4 Kg2 Ne5 Nxe5 Kxe5 Rh1 d3 cxd3 Rxd3 
 10	 -0.04 	31716  	0:00.02	Rc3 Kg2 Ke6 Rg1 Kf6 Kf1 Bf4 Bf3 Ne5 Nxf4 gxf4 
  9	 -0.15 	15613  	0:00.01	Rc3 Kg2 Ke6 Rh1 Kf6 Bf3 Nh4+ Kg3 Nxf3 Kxf3 
  8	 -0.32 	2135    	0:00.00	Nf4 Nxf4 Bxf4 Kg2 Be5 Rh1 Bd4 Re1 
  7	 -0.22 	1602    	0:00.00	Nf4 Nxf4 Bxf4 Kg2 Be5 Rh1 Bb2 
  6	 -0.49 	1016    	0:00.00	Nf4 Nxf4 Bxf4 Kg2 Be5 Rh1 
  5	 -0.35 	783      	0:00.00	Ne5 Nxe5 Kxe5 Kg2 Rc3 
  4	 -0.35 	636      	0:00.00	Ne5 Kg2 Rc3 Nxe5 Kxe5 
  3	 -0.49 	283      	0:00.00	Rc3 f3 Nf4 
  2	 -0.37 	188      	0:00.00	Nf4 Nxf4 
  1	 -0.36 	37        	0:00.00	Nf4 
  0	#

and with contempt set to -20 for black , it takes even longer:

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 50	 -0.07!	291.2M	3:05.35	Ne5! 
 49	  0.00 	189.4M	2:00.13	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 48	  0.00 	155.9M	1:39.05	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 47	  0.00 	139.6M	1:28.60	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 46	  0.00 	79.7M  	0:50.17	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 45	  0.00 	66.9M  	0:41.97	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 44	  0.00 	58.8M  	0:36.95	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 43	  0.00 	48.4M  	0:30.62	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 42	  0.00 	35.3M  	0:22.10	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 41	  0.00 	27.2M  	0:16.86	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 40	  0.00 	20.5M  	0:12.60	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 39	  0.00 	16.4M  	0:10.12	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 38	  0.00 	13.4M  	0:08.31	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 37	  0.00 	10.7M  	0:06.69	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 36	  0.00 	8.28M  	0:05.19	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 35	  0.00 	6.73M  	0:04.20	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 34	  0.00 	5.68M  	0:03.60	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 33	  0.00 	4.54M  	0:02.92	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 32	  0.00 	3.76M  	0:02.44	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 31	  0.00 	3.18M  	0:02.06	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 30	  0.00 	2.62M  	0:01.73	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 29	  0.00 	2.00M  	0:01.34	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 28	  0.00 	1.58M  	0:01.06	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 27	  0.00 	1.32M  	0:00.87	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 26	  0.00 	1.05M  	0:00.69	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 25	  0.00 	824940	0:00.53	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 24	  0.00 	643875	0:00.42	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 23	  0.00 	510908	0:00.33	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 22	  0.00 	420957	0:00.28	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 21	  0.00 	344320	0:00.24	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 20	  0.00 	286490	0:00.20	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 19	  0.00 	247884	0:00.17	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 18	  0.00 	240111	0:00.17	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 17	  0.00 	204623	0:00.14	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 16	  0.00 	181119	0:00.13	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 15	  0.00 	164206	0:00.12	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Kg2 Rf7 
 14	  0.00 	133037	0:00.10	Rc7 Kg2 Rf7 Rh1 Bc3 Kg3 Rc7 Rf1 Bd4 Rh1 Bc3 
 13	  0.00 	111421	0:00.08	Rc7 Kg2 Rf7 Rh1 Bc3 Be2 Bd4 Kg3 Rc7 Bd1 Bc3 Bf3 Bd4 Bd1 
 12	  0.00 	102338	0:00.08	Rc7 Kg2 Rf7 Rh1 Bc3 Be2 Bd4 Rd1 Nh4+ Kg1 Ng6 Kg2 
 11	 -0.10 	53576  	0:00.04	Rc7 Kg2 Rf7 Rh1 Bc3 Be2 Bd4 Rc1 Rf8 Kg3 Rf7 Re1 
 10	  0.00 	24428  	0:00.02	Rc3 Kg2 Rc7 Rg1 Rc3 Rh1 Rc7 Rg1 
  9	 -0.32 	6151    	0:00.01	Rc3 Kg2 Ne5 Be2 Rxc2 Rd1 Bc3 Nxe5 Bxe5 Bd3 
  8	 -0.40 	2470    	0:00.00	Rc3 Kg2 Nf4+ Nxf4 Bxf4 Rg1 Be5 Rf1 Bd4 
  7	 -0.44 	1629    	0:00.00	Rc3 Kg2 Nf4+ Nxf4 Bxf4 Bf3 Be5 Re1 
  6	 -0.38 	833      	0:00.00	Ne5 Kg2 Nxd3 cxd3 Rc3 d4 
  5	 -0.27 	676      	0:00.00	Ne5 Nxe5 Kxe5 Kg2 Rc3 
  4	 -0.27 	522      	0:00.00	Ne5 Kg2 Rc3 Nxe5 Kxe5 
  3	 -0.40 	271      	0:00.00	Rc3 f3 Nf4 
  2	 -0.30 	180      	0:00.00	Nf4 Nxf4 
  1	 -0.27 	37        	0:00.00	Nf4 
  0	#
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Dann Corbit
Posts: 12540
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: New Stockfish contempt

Post by Dann Corbit »

Since I use SF almost exclusively for analysis, I simply change the default to 0 for contempt in ucioptions.cpp.
That way, I don't have to remember to set it.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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User avatar
MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: New Stockfish contempt

Post by MikeB »

Dann Corbit wrote:Since I use SF almost exclusively for analysis, I simply change the default to 0 for contempt in ucioptions.cpp.
That way, I don't have to remember to set it.
Right, we 're ok since we do our own compiles anyway Likewise all the folks on Github will be fine as well. But they should assume the worst case scenario and that is the common user will not know know or understand the issues. This is a type of issue where the maintainers should take into consideration the lowest common denominator, which is one who would not understand the implications.
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corres
Posts: 3657
Joined: Wed Nov 18, 2015 11:41 am
Location: hungary

Re: New Stockfish contempt

Post by corres »

I have a proposal to the developers of Stockfish:
Please, give one plus switcher to UCI options to switch on and to switch off the contempt with default = ON.
In this case all user will have the opportunity to choose their favorite playing and analyzing mode with only one click.
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Toadofsky
Posts: 27
Joined: Sat Dec 03, 2016 2:20 pm

Re: New Stockfish contempt

Post by Toadofsky »

MikeB wrote:
Dann Corbit wrote:Since I use SF almost exclusively for analysis, I simply change the default to 0 for contempt in ucioptions.cpp.
That way, I don't have to remember to set it.
Right, we 're ok since we do our own compiles anyway Likewise all the folks on Github will be fine as well. But they should assume the worst case scenario and that is the common user will not know know or understand the issues. This is a type of issue where the maintainers should take into consideration the lowest common denominator, which is one who would not understand the implications.
GUIs should offer a contempt setting for users capable of noticing the implications.
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Teemu Pudas
Posts: 88
Joined: Wed Mar 25, 2009 12:49 pm

Re: New Stockfish contempt

Post by Teemu Pudas »

...by default. There's a case for using contempt in analysis (as long as there's no sign-flipping when switching sides) so users shouldn't be prevented from doing it, but analysis contempt should definitely be 0 at default settings.
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