Stockfish finds some old vey hard positions

[Vinvin]

Intel 4930K, 6 cores 3.4 ghz

Karpov - Kasparov : Ng2!!! after 3h40m
...

[d]8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - 0 1
Stockfish_syzygy_14101816_x64_modern:
...
89/104+ 3:40:00 144.288.796k 10.930k +0,63 1.Cg2 hxg3+ 2.Rxg3
89/104+ 5:15:10 210.487.524k 11.131k +0,69 1.Cg2 hxg3+ 2.Rxg3

Today's run on this position (6*4GHz) : 3h6m

Code: Select all

FEN: 8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - 0 1

Stockfish_170810_x64_modern:
 101/106	1:54:13	179 874 971k	26 244k	+0,44	1.gxh4 Bg6 2.Ng2 Bf7 3.Nf4 Kc6 4.Nd3 Be6 5.Nc5 Bc8 6.Ke3 Kd6 7.Kf4 Ke7 8.Nd3 Bd7 9.Ke3 Kd6 10.Nc1 Kc7 11.Nb3 Kd6 12.Kd3 Kc7 13.Nc5 Bf5+ 14.Ke3 Bc8 15.Kf4 Kc6 16.Nd3 Kd6 17.Nc1 Bd7 18.Nb3 Kc7 19.Nc5 
 102/107+	3:06:58	276 330 671k	24 631k	+0,52	1.Ng2
 102/107+	4:03:37	352 448 299k	24 112k	+0,59	1.Ng2
 102/107+	5:00:35	419 728 888k	23 272k	+0,70	1.Ng2

[Nordlandia]

Vincent: 0.70 is not enough convincing.

0.70 advantage is equivalent to bishop-pair advantage +20 centipawn.

[peter]

Hi Vincent!

Intel 4930K, 6 cores 3.4 ghz

Karpov - Kasparov : Ng2!!! after 3h40m
...

[d]8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - 0 1
Stockfish_syzygy_14101816_x64_modern:
...
89/104+ 3:40:00 144.288.796k 10.930k +0,63 1.Cg2 hxg3+ 2.Rxg3
89/104+ 5:15:10 210.487.524k 11.131k +0,69 1.Cg2 hxg3+ 2.Rxg3

Today's run on this position (6*4GHz) : 3h6m

Code: Select all

FEN: 8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - 0 1

Stockfish_170810_x64_modern:
 101/106	1:54:13	179 874 971k	26 244k	+0,44	1.gxh4 Bg6 2.Ng2 Bf7 3.Nf4 Kc6 4.Nd3 Be6 5.Nc5 Bc8 6.Ke3 Kd6 7.Kf4 Ke7 8.Nd3 Bd7 9.Ke3 Kd6 10.Nc1 Kc7 11.Nb3 Kd6 12.Kd3 Kc7 13.Nc5 Bf5+ 14.Ke3 Bc8 15.Kf4 Kc6 16.Nd3 Kd6 17.Nc1 Bd7 18.Nb3 Kc7 19.Nc5 
 102/107+	3:06:58	276 330 671k	24 631k	+0,52	1.Ng2
 102/107+	4:03:37	352 448 299k	24 112k	+0,59	1.Ng2
 102/107+	5:00:35	419 728 888k	23 272k	+0,70	1.Ng2

Here's an overaggressive tactical komodo- setting:

Code: Select all

8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - 0 1

Analysis by Komodo 11.2.2 64-bitT:

1.gxh4 Bh7 
  =  (0.29 ++)   Depth: 7   00:00:00  82kN
...
1.gxh4 Bg6 
  +/=  (0.61 --)   Depth: 20   00:00:00  2792kN
1.Ng2 hxg3+ 2.Kxg3 
  +/-  (0.80 ++)   Depth: 20   00:00:00  3746kN
...
1.Ng2 hxg3+ 2.Kxg3 Bg6 3.Nf4 Bf7 4.Kh4 Ke7 5.Nxh5 Ke6 6.Ng7+ Ke7 7.Kg4 Bg6 8.Nh5 Be8 9.Nf4 Bd7+ 10.Kh4 Kf7 11.Nxd5 Bc6 12.Nc7 Bb7 13.Kg4 Ke7 14.Kf5 Kd7 15.Ne6 Bxf3 
  +/-  (0.94)   Depth: 22   00:00:01  12195kN
...
1.Ng2 hxg3+ 2.Kxg3 Bg6 3.Nf4 Bf7 4.Kh3 Ke7 5.Kh4 Kd7 6.Nxh5 Ke6 7.Ng7+ Ke7 8.Kg4 Bg6 9.Nh5 Bd3 10.Kg3 Bc4 11.Kg2 Ke6 12.Nf4+ Kf7 13.Kg3 Ke7 14.Kh4 Kf7 15.Nh5 Bb3 16.Kg4 Ke7 17.Kf4 Bc4 18.Kg3 Kf7 19.Kg4 Bb3 20.Nf4 Bc4 21.Kf5 
  +/-  (0.83)   Depth: 35   00:00:33  736MN
...
1.Ng2 hxg3+ 2.Kxg3 Bg6 3.Nf4 Bf7 4.Kh4 Ke7 5.Nxh5 Ke6 6.Ng7+ Ke7 7.Kg4 Bg6 8.Nh5 Bd3 9.Nf4 Bc4 10.Kh5 Kf7 11.Kh4 Ke7 12.Kg4 Kf7 13.Kh5 Ke7 14.Kg6 Bb3 15.Nh5 Bc2+ 16.Kg7 Bd1 17.Nxf6 Bxf3 18.Kg6 Be4+ 19.Kg5 Bd3 20.Nh5 Kf7 21.Nf4 Be4 22.Nh3 Bc2 23.Nf2 Ke6 24.Ng4 Bf5 25.Kf4 Bb1 26.Ne5 Bf5 
  +/-  (1.23)   Depth: 39   00:03:38  5364MN

[Uri Blass]

Vincent: 0.70 is not enough convincing.

0.70 advantage is equivalent to bishop-pair advantage +20 centipawn.

Stockfish did not finish to solve fail high based on the output

The 0.70 is probably going to be more than 0.70 at the end of the iteration.

[Nordlandia]

Vincent: 0.70 is not enough convincing.

0.70 advantage is equivalent to bishop-pair advantage +20 centipawn.

Stockfish did not finish to solve fail high based on the output

The 0.70 is probably going to be more than 0.70 at the end of the iteration.

You're right. This endgame is very extensively analysed.

[Vinvin]

Vincent: 0.70 is not enough convincing.

0.70 advantage is equivalent to bishop-pair advantage +20 centipawn.

Stockfish did not finish to solve fail high based on the output

The 0.70 is probably going to be more than 0.70 at the end of the iteration.

The last line was after 5 hours and I stopped the engine after 7 hours ...

[whereagles]

About Shirov Bh3: when I checked that position, I noted SF quickly sees that taking the bishop loses. Seeing that it is nevertheless the best move is what takes time.

[MikeB]

Vincent: 0.70 is not enough convincing.

0.70 advantage is equivalent to bishop-pair advantage +20 centipawn.

Stockfish did not finish to solve fail high based on the output

The 0.70 is probably going to be more than 0.70 at the end of the iteration.

The last line was after 5 hours and I stopped the engine after 7 hours ...

You might want to try soon to be released SF->CFish->Aristides v2.0 with this position:
[d]8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - 0 1

Code: Select all

 dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 33	 -20.27!	3.66G	1:41.03	Bh3! 
 33	 -16.90!	2.27G	1:04.04	Bh3! 
 33	 -14.36?	2.27G	1:03.93	Bh3 Kf2? 
 33	 -16.56!	2.22G	1:02.69	Bh3! 
 33	 -14.87!	2.17G	1:01.30	Bh3! 
 33	 -13.80?	2.17G	1:01.13	Bh3 Kf2? 
 33	 -14.70!	2.04G	0:57.66	Bh3! 
 33	 -13.87!	1.82G	0:51.80	Bh3! 
 33	 -12.84?	1.54G	0:44.01	Bh3 Kh2? 
 33	 -13.22?	1.54G	0:43.95	Bh3 Kh2? 
 33	 -13.55!	1.48G	0:42.38	Bh3! 
 33	 -13.34!	1.47G	0:41.96	Bh3! 
 33	 -13.18!	1.44G	0:41.30	Bh3! 
 33	 -13.07!	1.42G	0:40.53	Bh3! 
 33	 -12.99!	1.39G	0:39.75	Bh3! 
 32	 -12.92 	1.37G	0:39.17	Bh3 Kh2 Bg4 Kg3 Kf5 Bb2 Ke4 Bc1 Kd3 Bb2 Bh3 Kf2 Ke4 g3 Bg4 Ke1 Kd3 Bc1 f5 Kf2 Kc2 Ba3 d4 Bb4 a3 Bxa3 d3 Ke3 d2 Kf4 d1=Q Be7 Qd2+ Ke5 Qe1+ Kf6 Qxg3 Ke6 Qc7 Bf8 Qd8 Kf7 Qxh4 Ke6 Kb3 Bc5 g5 Ke5 
 32	 -11.13!	999.7M	0:28.89	Bh3! 
 32	 -9.00!	610.4M	0:18.38	Bh3! 
 32	 -7.31!	411.4M	0:12.73	Bh3! 
 32	 -5.98!	304.9M	0:09.59	Bh3! 
 32	 -4.93!	248.8M	0:07.89	Bh3! 
 32	 -4.10!	209.5M	0:06.68	Bh3! 
 32	 -3.46!	181.1M	0:05.82	Bh3! 
 32	 -2.96!	150.2M	0:04.87	Bh3! 
 32	 -2.57!	124.9M	0:04.08	Bh3! 
 32	 -2.28!	104.0M	0:03.42	Bh3! 
 32	 -2.07!	91.6M  	0:03.03	Bh3! 
 31	 -1.65 	20.8M  	0:00.74	Be4 g3 f5 Bh8 Kd6 Kf2 Kc5 Ke3 Kc4 Bf6 a3 Bg7 Kb3 Kd2 Kb4 Bf6 Kc4 Ke3 Bg2 Bg7 Bf1 Bd4 Kb4 Be5 Bg2 Bf6 a2 Kd2 Kc4 Ke3 Kb3 Kd2 Be4 Bd4 Kc4 

some others
[d]8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - 0 1-

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 33	+3.69!	1.52G	0:55.52	Nd3! 
 33	+3.55?	1.50G	0:54.99	Nd3 Nf5? 
 32	+3.69 	1.41G	0:51.40	Nd3 Ke6 Kc3 Kf5 e3 Nc6 f3 Ke6 Kb3 Kd6 Ka4 Rc5 bxc5+ bxc5 Nxc5 Kxc5 hxg5 fxg5 Rd1 h4 gxh4 gxh4 Kb3 d4 e4 Ne7 f4 Ng6 Rh1 d3 f5 Ne5 Kc3 d2 Kc2 Nf3 Rh3 Ne5 Rxh4 Kd4 f6 
 32	+3.49!	1.15G	0:42.30	Nd3! 
 32	+3.27!	952.3M	0:35.33	Nd3! 
 32	+3.26!	874.5M	0:32.59	Nd3! 
 32	+3.18!	843.3M	0:31.48	Nd3! 
 31	+3.11 	807.4M	0:30.15	Nd3 Nf5 e3 Nd6 Kc3 Ne4+ Kb2 Ke7 Ka3 Ke6 Nc1 Nxf2 Ne2 Rc5 bxc5 bxc5 Rd2 Ng4 hxg5 fxg5 Ka4 Nxe3 Kb5 Kd6 Nc3 d4 Ne4+ Kd5 Nxc5 h4 gxh4 gxh4 Nb3 
 31	+2.96!	717.5M	0:26.82	Nd3! 
 31	+2.80!	691.6M	0:25.88	Nd3! 
 31	+2.69!	674.9M	0:25.28	Nd3! 
 31	+2.62!	642.0M	0:24.11	Nd3! 
 30	+2.54 	581.6M	0:21.94	Nd3 Nc6 e3 Ke6 Kc3 Kf5 f3 Ke6 Kb3 Kd6 hxg5 fxg5 Ka4 Rc5 bxc5+ bxc5 Nxc5 Kxc5 Rd1 Ne7 Rh1 g4 f4 Nf5 Rxh5 Nxg3 Rg5 Ne2 Rxg4 d4 Rg2 d3 Kb3 Kd5 Rg5+ Ke4 Re5+ Kf3 
 30	+2.42!	455.0M	0:17.36	Nd3! 
 30	+2.20!	445.6M	0:17.02	Nd3! 
 30	+2.04!	439.5M	0:16.81	Nd3! 
 30	+1.93!	431.3M	0:16.51	Nd3! 
 30	+1.85!	418.9M	0:16.05	Nd3! 
 29	+1.78 	411.3M	0:15.77	Nd3 Nc6 e3 Nd8 Kc3 Ne6 Ne1 Kg6 Nc2 Kf5 Rd2 Ke4 Kb3 d4 exd4 gxh4 Re2+ Kf3 Rxe6 h3 Rxf6+ Kg2 Ne1+ Kf1 Nf3 Rd5 Kc4 Rd8 Rf5 Kxf2 Kd3 Kxg3 Ke4 h4 Rh5 h2 Rxh4 
 29	+1.81!	348.9M	0:13.39	Nd3! 
 29	+1.31!	306.4M	0:11.81	Nd3! 
 29	+0.92!	275.0M	0:10.66	Nd3! 
 29	+0.63!	265.7M	0:10.31	Nd3! 
 29	+0.42!	263.3M	0:10.22	Nd3! 
 29	+0.26!	260.3M	0:10.10	Nd3! 
 29	+0.15!	258.0M	0:10.02	Nd3! 
 29	+0.07!	255.4M	0:09.92	Nd3! 
 28	  0.00 	163.7M	0:06.40	hxg5 fxg5 Nxh5 Nc6 Rd3 Ne5 Rd4 Nc6 

[d]8/1B6/3r2p1/5p1p/5P1P/4k1P1/8/6K1 b - - 0 1

Code: Select all

 dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 42	 -132.71 	257.2M	0:08.76	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 41	 -132.71 	179.4M	0:06.27	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 40	 -132.71 	164.7M	0:05.77	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 39	 -132.71 	155.5M	0:05.46	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 38	 -132.71 	92.7M  	0:03.30	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 37	 -132.71 	77.2M  	0:02.73	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 36	 -132.71 	59.3M  	0:02.12	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 35	 -132.71 	46.2M  	0:01.65	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 34	 -132.71 	40.9M  	0:01.47	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 33	 -132.71 	31.1M  	0:01.12	g5 fxg5 f4 Kh2 f3 g6 f2 Bg2 Rxg6 Bf1 Rb6 Kg2 Rb1 Ba6 Rg1+ Kh2 f1=Q Bxf1 Rxf1 
 32	 -132.71 	24.3M  	0:00.88	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 31	 -132.71 	22.3M  	0:00.80	g5 fxg5 f4 Kh2 f3 g6 f2 Bg2 Rxg6 Bf1 Rb6 Kg2 Rb1 Ba6 Rg1+ Kh2 f1=Q Bxf1 Rxf1 
 30	 -132.71 	18.2M  	0:00.66	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 29	 -132.71 	16.9M  	0:00.61	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 28	 -132.71 	15.8M  	0:00.57	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 27	 -132.71 	15.0M  	0:00.54	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 26	 -132.71 	14.7M  	0:00.52	g5 fxg5 f4 Kh2 f3 Bc8 f2 Bh3 Ke2 Bg2 f1=Q Bxf1+ Kxf1 Kh1 Kf2 Kh2 Rd3 g6 Rxg3 
 25	 -132.70 	12.0M  	0:00.41	g5 fxg5 f4 Kh2 f3 Kh3 f2 Bg2 Ke2 Be4 f1=Q+ Bg2 Qxg2+ Kxg2 Rd2 g6 Rd6 g7 Rg6 g4 Rxg7 
 24	 -2.37 	885576	0:00.03	Rd1+ Kg2 Rd7 Bc6 Rc7 Bd5 Rc2+ Kf1 Kd4 Bf3 Rb2 Bc6 Ke3 Bd5 Rb1+ Kg2 Rc1 Bb7 Rc2+ Kg1 Kd4 Kf1 Rd2 Bc6 Rb2 Kg1 Rc2 Bb7 

[d]1q5r/5rk1/R2p1nn1/3Ppp2/1pB2p2/1P5P/2R2BPK/5Q2 b - - 0 1

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 30	 -4.23 	1.22G	0:51.74	Ng4+ Kh1 f3 gxf3 Nf4 h4 Nxf2+ Qxf2 Kf6 Qe1 Rfh7 Rh2 Ng6 f4 Nxf4 Qf2 Qc7 Rc6 Qe7 Kg1 Rg7+ Kf1 Rhg8 Ra6 Qc7 h5 Rg1+ Qxg1 Rxg1+ Kxg1 Qc5+ Kf1 Nxd5 Rd2 Ne3+ Ke1 Nxc4 bxc4 Qg1+ Ke2 Qg2+ Ke1 Qh1+ Ke2 Qxh5+ Ke1 Qh4+ Kd1 Qg4+ Ke1 Qg1+  
 29	 -4.23 	1.16G	0:49.26	Ng4+ Kh1 f3 gxf3 Nf4 h4 Nxf2+ Qxf2 Kf6 Qe1 Rfh7 Rh2 Ng6 f4 Nxf4 Qf2 Qc7 Rc6 Qe7 Kg1 Rg7+ Kf1 Rhg8 Ra6 Qc7 h5 Rg1+ Qxg1 Rxg1+ Kxg1 Qc5+ Kf1 Nxd5 Rd2 Ne3+ Ke1 Nxc4 bxc4 Qg1+ Ke2 Qg2+ Ke1 Qh1+ Ke2 Qxh5+ Ke1 Qh4+ Kd1 Qg4+ Ke1 Qg1+  
 29	 -4.20!	1.09G	0:46.32	Ng4+! 
 29	 -4.09!	988.2M	0:42.20	Ng4+! 
 29	 -4.02!	935.7M	0:40.03	Ng4+! 
 28	 -3.94 	883.9M	0:37.95	Ng4+ Kh1 f3 gxf3 Nf4 h4 Nxf2+ Qxf2 Kf6 Qe1 Rfh7 Rh2 Ng6 f4 Nxf4 Qf2 Qc7 Bb5 Qc1+ Qg1 Qxg1+ Kxg1 e4 Rxd6+ Ke5 Rc6 Ra7 Ra6 Rg7+ Kh1 Nxd5 h5 Rg3 Bc4 Ne3 Bf7 Ng4 Rg2 Kf4 Rxg3 Kxg3 Kg1 f4 Ra2 Ne5 Bg6 e3 Ra5 
 28	 -3.89!	836.6M	0:35.98	Ng4+! 
 28	 -3.73!	782.8M	0:33.79	Ng4+! 
 28	 -3.62!	736.8M	0:31.91	Ng4+! 
 28	 -3.55!	719.1M	0:31.18	Ng4+! 
 27	 -3.47 	681.3M	0:29.60	Ng4+ Kh1 f3 gxf3 Nf4 h4 Nxf2+ Qxf2 Kf6 Qe1 Rfh7 Rh2 Ng6 f4 Nxf4 Qf2 Qc7 Bb5 Nxd5 Rc6 Qb8 Bc4 Nf4 Ra6 Qb7+ Kg1 Rd8 Kf1 Qe4 Ra1 Nd3 Qg3 Qf4+ Qxf4 Nxf4 Ra4 e4 Rxb4 Ke5 Ke1 d5 Bf1 Rdh8 Kd2 Rxh4 Rxh4 
 26	 -3.52 	637.7M	0:27.75	Ng4+ Kh1 f3 gxf3 Nf4 h4 Nxf2+ Qxf2 Kf6 Qe1 Rfh7 Rh2 Ng6 f4 Nxf4 Qf2 Qc7 Bb5 Nxd5 Rc6 Qb8 Bc4 Nf4 Ra6 Qb7+ Kg1 Rd8 Qb6 Qxb6+ Rxb6 e4 Kf2 Ke5 Rxb4 d5 Be2 Rg8 Rb6 Rhg7 Ke3 d4+ Kd2 
 26	 -3.31!	599.6M	0:26.19	Ng4+! 
 26	 -3.10!	563.2M	0:24.66	Ng4+! 
 26	 -2.86?	520.5M	0:22.90	Ng4+ Kh1? 
 26	 -2.94?	513.2M	0:22.59	Ng4+ Kh1? 
 25	 -3.01 	511.1M	0:22.50	Ng4+ Kh1 f3 gxf3 Nf4 h4 Nxf2+ Qxf2 Kf6 Qe1 Rfh7 Rh2 Ng6 f4 Nxf4 Qf2 Qc7 Rc6 Qe7 Ra6 Rg7 Qb6 Rhg8 h5 Qc7 Rha2 Qxb6 Rxb6 Rg1+ Kh2 e4 h6 R1g3 Rxd6+ Ke5 Re6+ Nxe6 dxe6 
 25	 -3.07!	500.0M	0:22.03	Ng4+! 
 25	 -3.05!	488.3M	0:21.54	Ng4+! 
 25	 -2.98!	478.7M	0:21.13	Ng4+! 
 24	 -2.90 	468.6M	0:20.70	Ng4+ Kg1 f3 g3 Nxf2 Qxf2 e4 Bf1 Ne5 Rca2 Rh6 Ra8 Qc7 R2a7 Qc3 Rxf7+ Nxf7 Re8 Rg6 Bc4 Qc1+ Kh2 f4 g4 Qe3 Qxe3 fxe3 Rxe4 e2 
 24	 -2.79!	427.5M	0:18.95	Ng4+! 
 24	 -2.57!	400.1M	0:17.77	Ng4+! 
 24	 -2.41!	393.3M	0:17.48	Ng4+! 
 24	 -2.30!	383.1M	0:17.04	Ng4+! 
 24	 -2.22!	371.4M	0:16.52	Ng4+! 
 23	 -2.15 	331.8M	0:14.78	Qd8 Be2 Ne4 Bd3 Nc3 Qc1 Qf6 Bf1 Rd7 Be1 Nxd5 Rc8 Nge7 Rxh8 Kxh8 Ra8+ Kh7 Bd2 Qg5 Kh1 Ne3 Bxb4 Nxf1 Qxf1 

[d]8/1k4p1/3p1pPp/1P2pP1P/2n1P3/3K4/2B5/8 b - -

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 47	 -2.01 	1.31G	0:44.34	d5 Bb3 Nd6 Bxd5+ Kb6 Bc4 Kc5 b6 Kxb6 Bg8 Kb5 Ke3 Kc5 Kd3 Nb5 Be6 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Ne1 Bf1 Nc2+ Kf3 Kd4 Ba6 Ne1+ Ke2 Ng2 Kf3 Nf4 Bb7 Kd3 Kg4 Ke3 Kh4 Nd3 Bd5 Nc5 Kg4 Nxe4 Bc4 Nd6 Ba6 
 46	 -2.01!	1.30G	0:43.94	d5! 
 45	 -1.94 	1.18G	0:40.10	d5 Bb3 Nd6 Bxd5+ Kb6 Bc4 Kc5 b6 Kxb6 Bg8 Kb5 Ke3 Kc5 Kd3 Nb5 Be6 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Ba6 Nc4+ Ke2 Na5 Ke3 Nb3 Bb5 Nd2 Ba4 Nc4+ Kf3 Kd3 Bb5 Kd4 Ke2 Ne3 Kf3 Nc2 Bd7 Ne1+ Kf2 Nd3+ Kg 
 44	 -1.94 	1.17G	0:39.72	d5 Bb3 Nd6 Bxd5+ Kb6 Bc4 Kc5 b6 Kxb6 Bg8 Kb5 Ke3 Kc5 Kd3 Nb5 Be6 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Ba6 Nc4+ Ke2 Na5 Ke3 Nb3 Bb5 Nd2 Ba4 Nc4+ Ke2 Kd4 Bc2 Nd6 Kf2 Nb7 Kf3 Kc3 Bd1 Nc5 
 43	 -1.94 	1.14G	0:39.04	d5 Bb3 Nd6 Bxd5+ Kb6 Bc4 Kc5 b6 Kxb6 Bg8 Kb5 Ke3 Kc5 Kd3 Nb5 Be6 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Ba6 Nc4+ Ke2 Na5 Ke3 Nb3 Bb5 Nd2 Ba4 Nc4+ Ke2 Kd4 Kf3 Nd2+ Ke2 Nxe4 Bb3 Nd6 Bc2 
 43	 -1.92!	1.14G	0:38.82	d5! 
 43	 -1.76!	1.06G	0:36.31	d5! 
 43	 -1.65!	971.3M	0:33.55	d5! 
 43	 -1.57!	901.9M	0:31.30	d5! 
 42	 -1.50 	855.5M	0:29.74	d5 Bb3 Nd6 Bxd5+ Kb6 Be6 Kxb5 Bb3 Kc5 Be6 Nb5 Bg8 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Ba6 Nc4+ Kf3 Kd4 Bb5 Nd6 Bc6 Kd3 Ba4 Nc4 Bb5 Kd4 Bc6 Nd2+ Kg4 Nxe4 Kf3 Nc5 
 41	 -1.46 	810.8M	0:28.21	d5 Bb3 Nd6 Bxd5+ Kb6 Be6 Kxb5 Bb3 Kc5 Be6 Nb5 Bg8 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Ba6 Nc4+ Kf3 Kd4 Bb5 Nd2+ Ke2 Nb1 Bc6 Na3 Kd2 Nc4+ Kd1 Ne3+ Ke2 Ng2 Kf3 Ne1+ Ke2 Nd3 
 40	 -1.42 	765.5M	0:26.70	d5 Bb3 Nd6 Bxd5+ Kb6 Be6 Kxb5 Bb3 Kc5 Be6 Nb5 Bb3 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Ba6 Nc4+ Ke2 Kd4 Bb7 Nb2 Bc6 Nd3 Kf3 Kc3 Ke3 Nf4 Ba4 Nxh5 Bd1 
 39	 -1.38 	689.7M	0:24.15	d5 Bb3 Nd6 Bxd5+ Kb6 Be6 Kxb5 Bb3 Kc5 Be6 Nb5 Bb3 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Bb5 Nc4+ Ke2 Kd4 Bc6 Nd6 Kf3 Kc4 Ba8 Kc3 Ke3 Nb5 Bc6 Na3 Ba4 Nc2+ Ke2 Nd4+ Ke3 
 38	 -1.38 	685.7M	0:24.02	d5 Bb3 Nd6 Bxd5+ Kb6 Be6 Kxb5 Bb3 Kc5 Be6 Nb5 Bb3 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Bb5 Nc4+ Ke2 Kd4 Bc6 Nd6 Kf3 Kc4 Ba8 Kc3 Ke3 Nb5 Bc6 Na3 Ba4 
 37	 -1.38 	683.3M	0:23.94	d5 Bb3 Nd6 Bxd5+ Kb6 Be6 Kxb5 Bb3 Kc5 Be6 Nb5 Bb3 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Bb5 Nc4+ Ke2 Kd4 Bc6 Nd6 Kf3 Kc4 Ba8 Kc3 Bd5 Kd3 Ba2 Kd4 Bb1 
 36	 -1.38 	680.3M	0:23.83	d5 Bb3 Nd6 Bxd5+ Kb6 Be6 Kxb5 Bb3 Kc5 Be6 Nb5 Bb3 Nd4 Bd5 Kb4 Bb7 Nf3 Ba6 Ng5 Ke3 Nh3 Be2 Nf4 Bd1 Kc3 Bf3 Nd3 Be2 Nb2 Bb5 Nc4+ Ke2 Kd4 Bc6 Nd6 Kf3 Kc4 Ba8 Kc3 Bd5 Kd4 Ba8 Kd3 
 36	 -1.26!	669.8M	0:23.48	d5! 
 36	 -1.13!	669.7M	0:23.48	d5! 
 36	 -0.46!	669.7M	0:23.48	d5! 
 35	  0.00 	363.9M	0:12.80	Na3 Ba4 Kb6 Kc3 d5 Kb4 Nc4 Bb3 Ne3 Bxd5 Nf1 Bb3 Nd2 Bc2 Nf1 Kc3 Ng3 Bd1 Nxe4+ Kc4 Ng3 Kd5 e4 Ke6 e3 Kf7 Nxf5 Ke6 Ng3 Kf7 Nf5 

but position analysis is not Arisides's strength, it is game play - here are 63 hand picked positions from Kai's 3 move opening book that tend to exaggerate the real ELO difference when the engines are every close, game 60 seconds with 0.6 sec inc vs today's dev-Stockfish

Code: Select all

126 rounds and 126 games completed...
time control: 6000+60
Date: 08/13/17 : 21:51:26
126 game(s) loaded
Rank Name                      Rating   Δ     +    -     #     Σ    Σ%     W    L    D   W%    =%   OppR 
---------------------------------------------------------------------------------------------------------
   1 Aristides v2.0d 64 POPCN   3119   0.0   13   13   126   70.5  56.0   23    8   95  18.3  75.4  3081 
   2 Stockfish 130817 64 POPC   3081  38.5   13   13   126   55.5  44.0    8   23   95   6.3  75.4  3119 
---------------------------------------------------------------------------------------------------------

in this example game -
[pgn][Event "Computer chess game"]
[Site "Mac-Pro"]
[Date "Sun Aug 13 21:40:49 2017"]
[Round "40"]
[White "Stockfish 130817 64 POPC"]
[Black "Aristides v2.0d 64 POPCN"]
[Result "0-1"]
[TimeControl "6000+60"]
[FEN "r1bqkbnr/pp1ppp1p/2n3p1/2p5/5P2/5NP1/PPPPP2P/RNBQKB1R w KQkq - c0 2;
"]

1. e4 d5 2. exd5 Qxd5 3. Bg2 Bg7 4. d3 Qe6+ 5. Qe2 Nh6 6. Nbd2
Qxe2+ 7. Kxe2 b6 8. Nc4 Ba6 9. Be3 Rc8 10. Nfe5 Nd4+ 11. Bxd4
cxd4 12. Kd2 f6 13. Nf3 Kf7 14. Bh3 Rcd8 15. g4 Bb7 16. Rhf1
Bc8 17. Rg1 Ke8 18. Rae1 Nf7 19. Bf1 Bb7 20. Bg2 Bh6 21. g5 Bxf3
22. Bxf3 fxg5 23. a4 gxf4 24. a5 Nd6 25. axb6 axb6 26. Nxb6 Rb8
27. Nc4 Nxc4+ 28. dxc4 Rxb2 29. Rb1 Rxb1 30. Rxb1 Rf8 31. Rb8+
Kf7 32. Rb6 Ke8 33. Rb8+ Kf7 34. Rb6 Bg5 35. Kd3 Bf6 36. c5 Rc8
37. Kc4 Rc7 38. Bd5+ Kf8 39. Kb5 Rc8 40. c6 Be5 41. Rb7 Bd6 42.
Be6 Rc7 43. Bd5 e6 44. Bf3 Ke7 45. h4 Be5 46. Kb6 Kd8 47. h5
gxh5 48. Bxh5 Rxb7+ 49. cxb7 Bb8 50. Kc5 Kc7 51. Bf3 e5 52. Kc4
Kd6 53. Kd3 Ke6 54. Ke4 Bc7 55. Bg4+ Kf6 56. Kf3 Kg5 57. Bh3
Kg6 58. Bd7 Bb8 59. Be8+ Kg5 60. Bd7 Bd6 61. Bb5 Kf6 62. Bd7
Bb8 63. Bg4 Kg6 64. Bd7 Bc7 65. Be8+ Kf6 66. Bh5 Kg5 67. Be8
e4+ 68. Kxe4 Kg4 69. Kxd4 f3 70. Ke4 Kg3 71. Bh5 f2 72. Be2 h5
73. Bf1 h4 74. Ke3 Bb8 75. Ke2 Bf4 76. c4 Bb8 77. Ke3 Bd6 78.
Ke2 Bf4 79. c5 Bb8 80. Ke3 Bc7 81. Ke2 Bf4 82. c6 Bd6 83. Ke3
Bc7 84. Ke2 Bf4 85. c7 Bxc7 86. Ke3 Bb8 87. Bb5 h3 88. Ke2 Kg2
89. Ke3 f1=Q 90. Bc6+ Kg3 91. Bd5 Qg2 92. Ba2 Qxb7 93. Kd4 Qb2+
94. Kd3 Qxa2 95. Ke4 h2 96. Kf5 h1=Q 97. Kf6 Qh6+ 98. Ke7 Qd6+
99. Ke8 Qae6# 0-1 {White Checkmated}[/pgn]

how many engines play the game winning 67 ...e4+!
[d]4B3/1Pb4p/8/4p1k1/3p1p2/5K2/2P5/8 b - - 31 67

[MikeGL]

how many engines play the game winning 67 ...e4+!
[d]4B3/1Pb4p/8/4p1k1/3p1p2/5K2/2P5/8 b - - 31 67

[/quote]
A good test position I think.

.

[Paloma]

how many engines play the game winning 67 ...e4+!

[D] 4B3/1Pb4p/8/4p1k1/3p1p2/5K2/2P5/8 b - - 0 1
Analysis by Andscacs 0.91b:

67...h6 68.Bd7 Kf6 69.Bc6 Ke6 70.Ke2 h5 71.Be4 Kd6 72.Kf3 Kc5 73.Bg6 Kd5 74.Bd3 Kc6 75.Be4+ Kb5 76.Bg6 Bb8
Black is better: -/+ (-1.20) Depth: 33/45 00:00:20 136MN
67...h6 68.Bd7 Kf6 69.Bc6 Ke6 70.Ke2 h5 71.Be4 Kd6 72.Bh7 Bb8 73.Be4 Kc5 74.Kd3 h4 75.c3 dxc3 76.Kxc3 h3
Black is better: -/+ (-1.14) Depth: 34/46 00:00:25 169MN
67...h6 68.Bd7 Kf6 69.Bc6 Ke6 70.Ke2 h5 71.Be4 Kd6 72.Bf3 Kc5 73.Kd3 h4 74.Bg2 Bb8 75.c3 dxc3 76.Kxc3 Bc7
Black is better: -/+ (-1.19) Depth: 35/48 00:00:32 215MN
67...h6 68.Bd7 Kf6 69.Bc6 Ke6 70.Ke2 Kd6 71.Bf3 h5 72.Kd3 h4 73.Bg2 Bb8 74.Ke4 Kc5 75.Kd3 Kb6 76.c3 dxc3
Black is better: -/+ (-1.19) Depth: 36/50 00:00:39 268MN
67...h6 68.Bd7 Kf6 69.Bc6 Ke6 70.Be4 Kd6 71.Kf2 Kc5 72.Ke2 Kc4 73.Kd2 h5 74.Bf5 h4 75.Be6+ Kc5 76.Bf5 Bd6
Black is better: -/+ (-1.16) Depth: 37/55 00:00:52 357MN
67...e4+
Black is clearly better: -/+ (-1.35 ++) Depth: 37/55 00:01:07 454MN
67...e4+
Black is clearly better: -/+ (-1.51 ++) Depth: 37/58 00:01:20 538MN
67...e4+
Black is clearly better: -+ (-1.75 ++) Depth: 37/64 00:01:33 623MN
67...e4+
Black is clearly better: -+ (-2.11 ++) Depth: 37/66 00:01:49 721MN
67...e4+
Black has a decisive advantage: -+ (-2.65 ++) Depth: 37/66 00:02:19 783MN
67...e4+
Black has a decisive advantage: -+ (-3.46 ++) Depth: 37/68 00:02:52 982MN
67...e4+
Black is winning: -+ (-4.67 ++) Depth: 37/68 00:03:35 1238MN
67...e4+
Black is winning: -+ (-6.48 ++) Depth: 37/69 00:04:35 1630MN
67...e4+
Black is clearly winning: -+ (-9.19 ++) Depth: 37/83 00:05:50 2130MN
67...e4+
Black is clearly winning: -+ (-19.34 ++) Depth: 37/83 00:10:01 3854MN
67...e4+
Black is clearly winning: -+ (-28.47 ++) Depth: 37/91 00:12:12 4777MN

3 cores, 8192 MB Hash