How long does it take engines to find...?

[jp]

At what depths do engines find the best move in this position?


[fen]8/6p1/5p2/k5p1/P7/2K2r1P/3R1P2/8 w - - 0 1[/fen]


Ideally, we'd want the engine to find and stick with the move (at higher depths), as well as give the correct evaluations of this move and other moves.

[dangi12012]

Your question is way too generic to answer with anything that would help you.


Solving a position as a test for an engine does not give you any approximation of general strength.
Anyway here is the output I forgot to close it in the background - and 112 Billion nodes is substantial analysis:

Code: Select all

FEN: 8/6p1/5p2/k5p1/P7/2K2r1P/3R1P2/8 w - - 0 1

Stockfish_14.1_win_x64_bmi2:
NNUE evaluation using nn-13406b1dcbe0.nnue enabled
 1/1	00:00	 818	205k	-0,30	Kc3-c4
 2/3	00:00	 4k	965k	-2,48	Rd2-d3 Rf3xf2
 3/5	00:00	 6k	1.398k	-1,68	Kc3-c4 Ka5xa4 Rd2-d1 Rf3-f4+ Kc4-c5
 4/4	00:00	 7k	1.682k	-1,17	Kc3-c4 Rf3xh3 Rd2-a2 Rh3-f3 Kc4-c5
 5/5	00:00	 9k	1.807k	-0,72	Kc3-c4 Rf3xh3 Rd2-d7
 6/6	00:00	 13k	2.613k	-0,68	Kc3-c4 Rf3xh3 Rd2-d7 Rh3-f3 Rd7-a7+ Ka5-b6
 7/7	00:00	 24k	4.819k	-0,72	Kc3-c4 Rf3xh3 Rd2-d7 Rh3-h4+ Kc4-d5 Rh4-f4 Rd7xg7
 8/11	00:00	 46k	7.722k	-0,86	Kc3-c4 Rf3xh3 Rd2-d7 Rh3-f3 Rd7-a7+ Ka5-b6 Ra7xg7 Rf3xf2 Rg7-g6
 9/13	00:00	 111k	15.813k	-0,62	Kc3-c2 Rf3xh3 Kc2-d1 Rh3-h1+ Kd1-e2 Ka5xa4
 10/12	00:00	 240k	24.048k	-0,63	Kc3-c2 Ka5xa4 Kc2-d1 Ka4-b5 Kd1-e2 Rf3xh3 Rd2-d7 Rh3-h7 Ke2-f1 Kb5-c5
 11/18	00:00	 612k	34.023k	-1,25	Kc3-d4 Rf3xh3 Kd4-e4 Ka5xa4 Rd2-d7 g7-g6 Rd7-d6 f6-f5+ Ke4-e5 g5-g4
 12/17	00:00	 722k	34.377k	-1,06	Kc3-c2 Ka5xa4 Kc2-d1 Ka4-b5 Rd2-d7 Rf3xf2 Rd7xg7 Kb5-c4 Kd1-e1 Rf2-f4 Ke1-e2 Kc4-d5
 13/17	00:00	 907k	36.262k	-0,68	Kc3-c2 Ka5xa4 Kc2-d1 Ka4-b4 Rd2-d7 Rf3xf2 Rd7xg7 Kb4-c5 h3-h4 g5xh4 Kd1-e1 Rf2-f4 Rg7-d7 Kc5-c6
 14/22	00:00	 1.364k	38.968k	-0,56	Kc3-c2 Rf3xh3 Kc2-d1 Ka5xa4 Rd2-d7 g7-g6 Kd1-e2 f6-f5 Rd7-d6 Rh3-h6 f2-f3 Ka4-b5 Rd6-f6 Kb5-c4 Rf6-d6 f5-f4 Ke2-f1 Kc4-c5
 15/20	00:00	 1.867k	40.591k	-0,63	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-d7 g7-g6 Kd1-e2 Rh3-h4 Rd7-g7 Rh4-h6 Rg7-b7 g5-g4 Ke2-f1 Rh6-h3 Rb7-b6 Rh3-f3 Kf1-g1 g6-g5
 16/27	00:00	 5.458k	39.267k	-1,59	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-d7 Rh3-h7 Rd7-b7 Ka4-a5 Kd1-e2 Ka5-a6 Rb7-b8 Ka6-a7 Rb8-b3 Rh7-h4 Rb3-e3 Rh4-b4 Ke2-f3
 17/22	00:00	 5.631k	39.380k	-1,43	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Rf5-f4 Rc3-c5+ Ka5-b6 Rc5-c3 Rf4-d4 Rc3-f3 Kb6-a5 Rf3-f5+ Ka5-a6 Rf5-f3 Ka6-b6 Kb3-a3 Kb6-a5 Rf3-f5+ Ka5-a6
 18/24	00:00	 5.942k	39.094k	-1,48	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Rf5-e5 Rc3-d3 Re5-e8 Rd3-c3 Ka5-b6 Kb3-a3 Re8-e4 Ka3-b3 Re4-e5 Rc3-g3 Kb6-c5
 19/31	00:00	 7.972k	39.271k	-1,41	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-d7 Rh3-h7 Rd7-b7 Ka4-a5 Kd1-e2 Ka5-a6 Rb7-b1 Rh7-h3 Rb1-g1 Rh3-h4 Rg1-b1 Rh4-f4 Ke2-e3 Rf4-f5 Rb1-d1 Rf5-b5
 20/28	00:00	 8.080k	39.224k	-1,41	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-d7 Rh3-h7 Rd7-b7 Ka4-a5 Kd1-e2 Ka5-a6 Rb7-b1 Rh7-h3 Rb1-g1 Rh3-h4 Rg1-b1 Rh4-f4 Ke2-e3 Rf4-f5 Rb1-d1 Rf5-b5 Ke3-f3 Rb5-b4 Kf3-g3 Rb4-b7 Kg3-g4 Ka6-b5 Rd1-c1 g7-g6
 21/30	00:00	 8.868k	39.240k	-1,42	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-d7 Rh3-h7 Rd7-b7 Ka4-a5 Kd1-e2 Ka5-a6 Rb7-b8 Ka6-a7 Rb8-b1 Rh7-h3 Rb1-g1 Rh3-h4 Rg1-b1 Rh4-e4+ Ke2-f3 Re4-c4 Rb1-b2 Rc4-c3+ Kf3-g4 g7-g6 Rb2-b1 Rc3-c4+ Kg4-h3
 22/33	00:00	 9.826k	39.305k	-1,43	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-d7 Rh3-h7 Rd7-b7 Ka4-a5 Kd1-e2 Ka5-a6 Rb7-b8 Ka6-a7 Rb8-b2 Rh7-h3 Ke2-f1 Rh3-c3 Kf1-g2 Rc3-c4 Kg2-g3 g7-g6 f2-f3
 23/29	00:00	 15.313k	40.297k	-1,65	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-d7 Rh3-h7 Rd7-b7 Ka4-a5 Kd1-e2 Ka5-a6 Rb7-b2 Rh7-h3 Ke2-f1 Rh3-c3 Kf1-g2 Rc3-c4 Kg2-h2 Rc4-c6 Kh2-h3 g7-g6 Rb2-b1 Rc6-b6 Rb1-g1 Rb6-b3+ Kh3-h2 Rb3-b2
 24/44	00:00	 32.938k	40.266k	-1,52	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-e1 Rd8-c8 Re1-e3+ Kb3-b4 Re3xh3 a4-a5+ Kb6-b7 Rc8-e8 Rh3-h2 Re8-e7+ Kb7-c6 Re7xg7 Rh2-h4+ Kb4-c3 Kc6-d5 Kc3-b3 Rh4-h8 a5-a6
 25/50	00:01	 41.702k	40.566k	-1,46	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-h4 Rd8-b8+ Kb6-c5 Rb8-b5+ Kc5-c6 Rb5-b3 f6-f5 a4-a5 Kc6-c5 Rb3-g3 g5-g4 h3xg4 Rh4xg4 Rg3-b3 Rg4-g1 Ka3-b2 Rg1-g2+ Kb2-b1 Rg2-g6 Rb3-b7 Kc5-d4 Kb1-c2 f5-f4 Kc2-d2 Rg6-g2+ Kd2-e1
 26/44	00:01	 57.952k	41.159k	-1,42	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-h4 Rd8-b8+ Kb6-a6 Rb8-b3 Rh4-h8 Rb3-c3 Rh8-e8 Ka3-b4 Re8-e4+ Kb4-a3 Ka6-a5 Rc3-c5+ Ka5-b6 Rc5-c8 Kb6-b7 Rc8-c3 Re4-h4 Rc3-f3 Kb7-b6 Rf3-c3 f6-f5 Rc3-b3+ Kb6-a6 Rb3-g3 g5-g4 h3xg4 Rh4xg4
 27/42	00:01	 70.773k	41.339k	-1,40	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-e2 Rd3-c3 Re2-e5 Kb3-a3 Re5-e4 Rc3-c5+ Ka5-b6 Rc5-c8 Re4-d4 Rc8-c3 Rd4-h4 Ka3-b3 Rh4-f4 Rc3-d3 Rf4-f1 Rd3-c3 Rf1-h1 Kb3-b4 Rh1-b1+ Kb4-a3 Rb1-e1 Rc3-c8 Re1-e4 Ka3-b3
 28/34	00:01	 73.700k	41.404k	-1,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-e2 Rd3-c3 Re2-e5 Kb3-a3 Re5-d5 Ka3-b3 Rd5-d4 Rc3-c5+ Ka5-b6 Rc5-c3 Rd4-e4 Rc3-c8 Kb6-b7 Rc8-c3 Re4-h4 Kb3-a3 Kb7-b6 Ka3-b3 Rh4-d4 Kb3-a3 Rd4-e4 Rc3-c8 Re4-h4 Rc8-c3 f6-f5 Rc3-g3 g5-g4 Rg3-b3+ Kb6-a6 h3xg4 Rh4xg4 Rb3-e3
 29/39	00:01	 73.932k	41.395k	-1,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-e2 Rd3-c3 Re2-e5 Kb3-a3 Re5-d5 Ka3-b3 Rd5-d4 Rc3-c5+ Ka5-b6 Rc5-c3 Rd4-e4 Rc3-c8 Re4-h4 Rc8-c3 Kb6-a5 Rc3-c5+ Ka5-a6 Rc5-c3 Rh4-f4 Kb3-a3 Ka6-a5 Rc3-c5+ Ka5-b6 Rc5-c3 g5-g4 h3xg4 Rf4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5 Rf3-g3 g7-g5 Rg3-f3 Re4-b4+ Kb3-c3
 30/45	00:01	 76.390k	41.426k	-1,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-e2 Rd3-c3 Re2-e5 Kb3-a3 Re5-d5 Ka3-b3 Rd5-d4 Rc3-c5+ Ka5-b6 Rc5-c3 Rd4-e4 Rc3-c8 Re4-h4 Rc8-c3 Kb6-a5 Rc3-c5+ Ka5-a6 Rc5-c3 Rh4-f4 Kb3-a3 Ka6-a5 Rc3-c5+ Ka5-b6 Rc5-c3 Rf4-e4 Rc3-c8 Re4-d4 Rc8-c3 f6-f5 Rc3-g3 g5-g4 h3xg4 Rd4xg4 Rg3-b3+ Kb6-a7 Rb3-e3 f5-f4 Re3-e7+ Ka7-b6
 31/45	00:03	 128.219k	42.177k	-1,83	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-e4 Rd3-c3 Re4-h4 Kb3-a3 g5-g4 h3xg4 Rh4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5 Rf3-g3 Re4-b4+ Kb3-c3 Rb4-b7 Rg3-g4 Rb7-c7+ Kc3-d3 g7-g5 Rg4-d4 Rc7-c1 Kd3-e2 Rc1-c6 Ke2-f2 Rc6-b6
 32/40-	00:03	 138.197k	42.236k	-1,91	Rd2-d3 Rf3xf2
 32/40+	00:03	 138.452k	42.237k	-1,82	Rd2-d3
 32/44+	00:03	 139.547k	42.236k	-1,69	Rd2-d3
 32/58	00:03	 148.657k	42.389k	-1,55	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-e4 Rd3-c3 Re4-h4 Kb3-a3 g5-g4 h3xg4 Rh4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5 Rf3-g3 Re4-b4+ Kb3-c3 Rb4-b7 Rg3-g4 Rb7-c7+ Kc3-d3 g7-g5 Rg4-g1 Ka5xa4 Rg1-a1+ Ka4-b4 Ra1-b1+ Kb4-a3 Rb1-b6 f6-f5 Rb6-b5 Rc7-f7 Kd3-e2 Ka3-a4 Rb5-e5 Ka4-b4 Ke2-f3 Rf7-f6 Kf3-e3 Kb4-c4 Ke3-f3 Rf6-f8 Re5-a5
 33/57-	00:03	 162.525k	42.613k	-1,63	Rd2-d3 Rf3xf2
 33/57-	00:03	 167.105k	42.618k	-1,72	Rd2-d3 Rf3xf2
 33/57-	00:06	 259.968k	43.070k	-2,26	Rd2-d3 Rf3xf2
 33/57	00:07	 328.790k	43.439k	-2,39	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-h4 Rd3-c3 Kb6-a5 Rc3-c5+ Ka5-a6 Rc5-c6+ Ka6-b7 Rc6-c3 Kb7-b6 Kb3-a3 g5-g4 h3xg4 Rh4xg4 Rc3-b3+ Kb6-a6 Rb3-f3 Rg4-e4 Ka3-b3 Ka6-a5 Rf3-g3 Re4-b4+ Kb3-c3 Rb4-b7 Rg3-g4 Rb7-c7+ Kc3-d3 Rc7-d7+ Kd3-e3 Rd7-b7 Ke3-d3 g7-g5 Rg4-g1 Rb7-b3+ Kd3-e2 Rb3-b6 Rg1-a1 Rb6-b2+ Ke2-e3 Rb2-b3+ Ke3-e2 Rb3-c3 Ra1-g1 Rc3-c6 Rg1-g4 Rc6-b6 Rg4-d4 Rb6-b4 Rd4-d5+ Ka5xa4
 34/57	00:07	 334.571k	43.451k	-2,39	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f4 Rd8-d3 Rf4-h4 Kb3-a3 Rh4-e4 Rd3-c3 g5-g4 h3xg4 Re4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5 Rf3-g3 Re4-b4+ Kb3-c2 Rb4-b7 Rg3-g4 g7-g5 Kc2-c3 Rb7-b1 Rg4-d4 Rb1-c1+ Kc3-d2 Rc1-c6 Rd4-g4 Rc6-c7 Rg4-d4 Rc7-b7 Kd2-c3 Rb7-b1 Rd4-d8 Rb1-f1 Rd8-a8+ Ka5-b6 a4-a5+ Kb6-b5 a5-a6 Rf1-f2 Kc3-d4 Rf2-f3 Kd4-d5 Kb5-b6 a6-a7 Kb6-b7
 35/41+	00:08	 349.681k	43.531k	-2,31	Rd2-d3
 35/48	00:08	 350.836k	43.528k	-2,39	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-e4 Rd8-c8 Re4-h4 Rc8-c3 g5-g4 h3xg4 Rh4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5 Rf3-g3 Re4-b4+ Kb3-c3 Rb4-b7 Rg3-g4 Rb7-c7+ Kc3-d3 Rc7-e7 Kd3-c3 Re7-b7 Kc3-d2 g7-g5 Kd2-c3 Rb7-b1 Rg4-d4 Rb1-c1+ Kc3-d2 Rc1-c6 Rd4-g4 Rc6-d6+ Kd2-e3 Rd6-b6 Rg4-d4 Rb6-b3+ Ke3-f2 Rb3-b4
 36/57	00:08	 357.942k	43.636k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-e4 Rd8-c8 Re4-h4 Rc8-c3 g5-g4 h3xg4 Rh4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5 Rf3-g3 Re4-b4+ Kb3-c3 Rb4-b7 Rg3-g4 Rb7-c7+ Kc3-d3 Rc7-e7 Kd3-c3 Re7-b7 Kc3-d2 g7-g5 Kd2-c3 Rb7-b1 Rg4-d4 Rb1-e1 Kc3-d2 Re1-e5 Rd4-g4 Re5-d5+ Kd2-e3 Rd5-d1 Rg4-c4 Rd1-b1 Rc4-c5+ Ka5xa4 Rc5-f5 Rb1-b6 Rf5-f1 Ka4-b4
 37/57	00:08	 378.165k	43.840k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-e4 Rd8-c8 Re4-h4 Rc8-c3 g5-g4 h3xg4 Rh4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5 Rf3-g3 Re4-b4+ Kb3-c3 Rb4-b7 Rg3-g4 Rb7-c7+ Kc3-d3 Rc7-d7+ Kd3-c3 Rd7-b7 Rg4-d4 Rb7-b6 Rd4-f4 Rb6-b1 Rf4-g4 g7-g5 Rg4-d4 Rb1-e1 Kc3-d2 Re1-e5 Rd4-g4 Re5-e6 Kd2-c3 Re6-e1 Rg4-d4 Re1-e3+ Kc3-d2 Re3-b3 Rd4-d5+ Ka5xa4 Rd5-f5
 38/42+	00:09	 398.227k	44.042k	-2,29	Rd2-d3
 38/57-	00:11	 507.081k	44.689k	-2,46	Rd2-d3 Rf3xf2
 38/57+	00:14	 638.259k	45.190k	-2,33	Rd2-d3
 38/57	00:14	 640.724k	45.204k	-2,24	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Kb3-a3 Rf5-f1 Rd3-d5+ Ka5-b6 Rd5-b5+ Kb6-c6 Rb5-b3 Kc6-c5 Ka3-b2 Rf1-e1 Rb3-b7 Re1-e2+ Kb2-b1 Re2-e3 a4-a5
 39/19-	00:14	 644.689k	45.203k	-2,32	Rd2-d3 Rf3xf2
 39/20+	00:14	 647.569k	45.161k	-2,24	Rd2-d3
 39/20+	00:14	 651.999k	45.193k	-2,12	Rd2-d3
 39/20	00:14	 653.627k	45.199k	-2,39	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-h4 Rd8-d3 Kb6-c5 Rd3-b3 Rh4-h8 a4-a5 f6-f5 Ka3-b2
 40/27-	00:14	 654.715k	45.203k	-2,49	Rd2-d3 Rf3xf2
 40/27+	00:14	 654.883k	45.202k	-2,39	Rd2-d3
 40/27	00:14	 663.314k	45.213k	-2,48	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Rb2-b7 Rh3-h7 Kd1-e2 Ka5-a6 Rb7-b8 Ka6-a7 Rb8-b2 Rh7-h3 Rb2-b1 Rh3-c3
 41/17	00:14	 672.627k	45.228k	-2,48	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Rb2-b7 Rh3-h7 Kd1-e2 Ka5-a6 Rb7-b8 Ka6-a7 Rb8-b2 Rh7-h3 Ke2-f1 Rh3-c3 Kf1-g2
 42/24	00:15	 697.809k	45.315k	-2,49	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Kd1-e2 Ka5-a6 Ke2-f1 Rh3-c3 Kf1-g2 Rc3-c7 Kg2-h3 Rc7-b7 Rb2-c2 Ka6-b6 Kh3-g4 Rb7-c7 Rc2-e2 Kb6-c5
 43/22	00:15	 719.378k	45.378k	-2,49	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Kd1-e2 Ka5-a6 Ke2-f1 Ka6-a7 Kf1-g2 Rh3-c3 Rb2-b4 Rc3-c7 Kg2-g3 Rc7-b7 Rb4-a4+ Ka7-b6 Kg3-g4 Kb6-c6 Ra4-a2 Kc6-d5
 44/16	00:16	 735.994k	45.384k	-2,49	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Kd1-e2 Ka5-a6 Ke2-f1 Ka6-a7 Kf1-g2 Rh3-c3 Rb2-b4 Rc3-c7 Kg2-g3 Rc7-b7
 45/19	00:17	 815.282k	45.513k	-2,50	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Kd1-e2 Ka5-a6 Ke2-f1 Rh3-h8 Kf1-g2 Rh8-c8 Kg2-h3 Rc8-c7 Kh3-g4 Rc7-b7 Rb2-c2 Ka6-b6 Kg4-f5
 46/42	00:19	 875.375k	45.829k	-2,57	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Kd1-e2 Ka5-a6 Ke2-f1 Ka6-a7 Rb2-c2 Ka7-b6 Kf1-g2 Rh3-d3 Rc2-c8 Rd3-d7 Kg2-f3 Rd7-c7 Rc8-d8 Kb6-c6 Kf3-g4 Rc7-e7 Kg4-f5 Re7-e2 f2-f3 Re2-e3
 47/25	00:20	 929.371k	45.956k	-2,57	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Rb2-b8 Ka5-a6 Kd1-e2 Rh3-c3 Ke2-d2 Rc3-c7 Kd2-e3 Rc7-b7 Rb8-c8 Ka6-b6 Ke3-e4 Rb7-d7 Rc8-c3 Rd7-c7 Rc3-b3+ Kb6-c5
 48/19	00:20	 956.062k	45.962k	-2,57	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Rb2-b8 Ka5-a6 Kd1-e2 Rh3-c3 Rb8-b1 Ka6-a7 f2-f3 Rc3-c7 Ke2-f2 Rc7-b7 Rb1-d1 Ka7-b6 Rd1-d6+ Kb6-c7
 49/19	00:21	 995.586k	45.975k	-2,57	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Rb2-b8 Ka5-a6 Kd1-e2 Rh3-c3 Rb8-b4 Rc3-c6 Rb4-b2 Rc6-c7 Rb2-b1 Rc7-b7 Rb1-a1+ Ka6-b6 Ra1-b1+ Kb6-c7
 50/19	00:22	 1.050.463k	46.197k	-2,58	Kc3-c2 Ka5xa4 Kc2-d1 Rf3xh3 Rd2-b2 Ka4-a5 Rb2-b8 Ka5-a6 Kd1-e2 Rh3-c3 Rb8-b4 Rc3-c6 Rb4-e4 Rc6-c7 Ke2-f3 Ka6-b5 Re4-e1 Kb5-c6 Kf3-g4 Kc6-d6
 51/17	00:25	 1.190.475k	46.245k	-2,58	Kc3-c2 Rf3xh3 Kc2-d1 Ka5xa4 Rd2-b2 Ka4-a5 Rb2-b8 Ka5-a6 Kd1-e2 Rh3-c3 Rb8-b4 Rc3-c6 Ke2-f1 Rc6-c7 Rb4-b8 Rc7-b7 Rb8-c8
 52/19+	00:27	 1.291.018k	46.286k	-2,50	Rd2-d3
 52/20+	00:29	 1.386.375k	46.435k	-2,41	Rd2-d3
 52/20	00:31	 1.456.979k	46.433k	-2,39	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f4 Kb3-a3 Rf4-h4 Rd8-b8+ Kb6-a6 Rb8-b3 Rh4-d4 Rb3-f3 Ka6-a5 Rf3-f5+ Ka5-b6 Rf5-b5+ Kb6-a6
 53/19	00:35	 1.637.575k	46.663k	-2,34	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-h4 Kb3-a3 Kb6-c5 Rd3-b3 Rh4-e4 a4-a5 Re4-e1 Ka3-b2 Re1-e7 Kb2-a3 f6-f5 Ka3-b2
 54/19	00:38	 1.818.928k	46.926k	-2,32	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-h4 Kb3-a3 Kb6-c5 Rd3-b3 Rh4-e4 a4-a5 Re4-e1 Ka3-b2 Re1-e8 Kb2-a3 f6-f5 Ka3-b2
 55/22+	00:42	 2.011.736k	47.121k	-2,24	Rd2-d3
 55/22	00:42	 2.016.064k	47.130k	-2,21	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-h4 Rd8-b8+ Kb6-a6 Rb8-b3 Rh4-c4 Rb3-f3 Ka6-a5 Rf3-f5+ Ka5-b6 Rf5-b5+ Kb6-a6
 56/18	00:44	 2.099.199k	47.352k	-2,21	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-h4 Rd8-b8+ Kb6-a6 Rb8-b3 Rh4-c4 Rb3-f3 Ka6-a5
 57/34+	00:47	 2.243.652k	47.490k	-2,12	Rd2-d3
 57/34	00:47	 2.264.267k	47.478k	-2,13	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-h4 Rd8-b8+ Kb6-c5 a4-a5 Rh4xh3+ Ka3-b2 g7-g6 Rb8-b6 Rh3-f3 Rb6-e6 Rf3-f2+ Kb2-b3 Kc5-d5 a5-a6 Kd5xe6
 58/20	00:52	 2.479.516k	47.271k	-2,12	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-h4 Rd8-b8+ Kb6-a7 Rb8-b3 Rh4-f4 Rb3-d3 Ka7-a6 Ka3-b3
 59/19-	00:54	 2.581.387k	47.195k	-2,20	Rd2-d3 Rf3xf2
 59/19	00:55	 2.621.489k	47.156k	-2,15	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-d3 Kb6-c5 Rd3-b3 Rc4-e4 a4-a5 Re4-e1 Ka3-b2
 60/37-	01:00	 2.856.365k	46.984k	-2,24	Rd2-d3 Rf3xf2
 60/63	01:45	 4.934.693k	46.765k	-2,28	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Kb3-a3 Rf5-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Ka3-b4 Rf3-f4+ Kb4-a3 Rf4-e4 Ka3-b3 Kb6-c5 Rd8-c8+ Kc5-d4
 61/18	01:45	 4.935.458k	46.765k	-2,28	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Kb3-a3 Rf5-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Ka3-b4 Rf3-f4+ Kb4-a3 Rf4-e4 Ka3-b3 Kb6-c5 Rd8-c8+ Kc5-d4
 62/18	01:45	 4.936.229k	46.765k	-2,28	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Kb3-a3 Rf5-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Ka3-b4 Rf3-f4+ Kb4-a3 Rf4-e4 Ka3-b3 Kb6-c5 Rd8-c8+ Kc5-d4
 63/19	01:45	 4.937.710k	46.764k	-2,28	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Kb3-a3 Rf5-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Ka3-b4 Rf3-f4+ Kb4-a3 Rf4-e4 Ka3-b3 Kb6-c5 Rd8-c8+ Kc5-d4 a4-a5
 64/25	01:46	 4.978.167k	46.757k	-2,28	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Ka5-b6 Rc3-g3 Rf5-f1 Kb3-c4 Kb6-c6 Rg3-c3 Rf1-f4+ Kc4-b3+ Kc6-b7 Rc3-e3 Kb7-a6 Re3-c3 Rf4-h4 Rc3-d3 Ka6-a5 Rd3-d5+ Ka5-b6 Rd5-d3 Kb6-c5
 65/21	01:47	 5.031.045k	46.750k	-2,28	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Ka5-b6 Rc3-g3 Rf5-f1 Kb3-c4 Kb6-c6 Rg3-g4 Rf1-e1 Kc4-b4 Kc6-d5 Kb4-b5 Re1-b1+ Kb5-a6 Rb1-b3 a4-a5
 66/22	01:53	 5.290.448k	46.769k	-2,29	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-h4 Rd3-c3 Kb6-a6 Rc3-d3 Ka6-a5 Rd3-d5+ Ka5-b6 Rd5-d3 Kb6-c5 Rd3-c3+ Kc5-d4 Rc3-g3 Rh4-h8 a4-a5 Kd4-c5
 67/28-	04:02	 11.208.128k	46.245k	-2,37	Rd2-d3 Rf3xf2
 67/32	04:02	 11.209.400k	46.245k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-h4 Rd8-d6+ Ka6-a5 Rd6-d5+ Ka5-b6 Rd5-d6+ Kb6-c5 Rd6-d3 Rh4-h8 Rd3-b3 Kc5-d5 a4-a5 f6-f5 Ka3-a4 f5-f4 a5-a6 Kd5-e4
 68/19	04:02	 11.210.430k	46.245k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-h4 Rd8-d6+ Ka6-a5 Rd6-d5+ Ka5-b6
 69/19	04:02	 11.211.404k	46.245k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-h4 Rd8-d6+ Ka6-a5 Rd6-d5+ Ka5-b6
 70/17	04:02	 11.212.542k	46.245k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-h4 Rd8-d6+ Ka6-a5
 71/66	04:36	 12.758.667k	46.124k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-c3+ Ka3-b4 Rc3xh3 Rd8-d6+ Ka6-b7 a4-a5 Rh3-e3 Rd6-d7+ Kb7-c6 Rd7xg7 Re3-e4+ Kb4-c3 Kc6-b5 Rg7-d7
 72/17	04:36	 12.760.703k	46.124k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-c3+ Ka3-b4
 73/17	04:36	 12.762.538k	46.124k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-c3+ Ka3-b4
 74/17	04:37	 12.785.054k	46.125k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-c3+ Ka3-b4
 75/17	04:37	 12.806.684k	46.128k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-c3+ Ka3-b4
 76/17	04:41	 12.996.165k	46.128k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-d8 Rc4-c3+ Ka3-b4
 77/26	05:49	 15.991.408k	45.780k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-a8+ Ka6-b7 Ra8-e8 Kb7-c6 Re8-c8+ Kc6-d5 Rc8-d8+ Kd5-e5 a4-a5 f6-f5 a5-a6
 78/18	05:50	 16.052.040k	45.777k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-a8+ Ka6-b7 Ra8-e8 Kb7-c6
 79/17	06:19	 17.319.271k	45.640k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-a8+ Ka6-b7 Ra8-e8
 80/18	06:58	 19.024.925k	45.434k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-a8+ Ka6-b7 Ra8-e8 Kb7-c6
 81/18	08:23	 22.707.910k	45.061k	-2,37	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f1 Rd3-d5+ Ka5-b6 Rd5-d8 Rf1-f3+ Kb3-b4 Rf3-f4+ Kb4-a3 Rf4-c4 Rd8-b8+ Kb6-a6 Rb8-a8+ Ka6-b7 Ra8-e8 Kb7-c6
 82/31+	11:26	 30.576.054k	44.558k	-2,29	Rd2-d3
 82/31	11:27	 30.636.341k	44.559k	-2,22	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Rf5-f4 Rc3-c5+ Ka5-b6 Rc5-c3 Rf4-h4 Kb3-a3 g5-g4 h3xg4 Rh4xg4 Rc3-f3 Rg4-e4 Ka3-b3 Kb6-a5
 83/23	14:59	 39.631.791k	44.047k	-2,23	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-h4 Rd3-c3 Kb6-a5 Rc3-c5+ Ka5-a6 Rc5-c3 Ka6-b6 Rc3-f3 Rh4-h8 Rf3-c3 Rh8-e8 Kb3-a3 Re8-e4 Rc3-b3+ Kb6-c5 a4-a5
 84/27	21:00	 54.898.485k	43.559k	-2,30	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-h4 Rd3-c3 Rh4-e4 Rc3-c8 Re4-f4 Rc8-c1 Rf4-f3+ Kb3-b4 Rf3xh3 a4-a5+ Kb6-b7 Rc1-e1 Kb7-c6 Re1-e6+ Kc6-d5
 85/23	21:00	 54.905.178k	43.560k	-2,30	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-e4 Rd3-c3 Re4-h4 Kb3-a3 g5-g4 h3xg4 Rh4xg4 Rc3-b3+ Kb6-a5 Rb3-b5+ Ka5-a6 Rb5-b8 g7-g6 Ka3-b3
 86/21	22:24	 58.638.159k	43.614k	-2,31	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f4 Rd3-d5+ Ka5-b6 Rd5-d3 Rf4-e4 Rd3-c3 Re4-d4 Rc3-c8 Rd4-h4 Rc8-c3 Kb6-a6 Rc3-d3 Ka6-a5 Rd3-d5+ Ka5-b6 Rd5-d3 Kb6-c5 Rd3-c3+ Kc5-d4
 87/20	27:27	 71.181.496k	43.206k	-2,31	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Rf5-e5 Rc3-d3 Re5-e1 Rd3-d5+ Ka5-b6 Rd5-d7 Re1-e3+ Kb3-b4 Re3-e4+ Kb4-b3 Re4-h4 Rd7-d3
 88/21	27:27	 71.189.965k	43.206k	-2,31	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Rf5-e5 Rc3-d3 Re5-e1 Rd3-d5+ Ka5-b6 Rd5-d7 Re1-e4 Rd7-d3 Kb6-c5 Rd3-c3+ Kc5-d4 Rc3-c4+ Kd4-d5 Rc4-c7 Re4-h4
 89/21	44:23	112.748.051k	42.333k	-2,31	Rd2-d3 Rf3xf2 Kc3-b3 Rf2-f5 Rd3-c3 Rf5-e5 Rc3-d3 Re5-e1 Rd3-d5+ Ka5-b6 Rd5-d7 Re1-e4 Rd7-d3 Kb6-c5 Rd3-c3+ Kc5-d4 Rc3-c4+ Kd4-d5 Rc4-c7 Re4-h4

[jp]

Thanks. So SF 14.1 cannot solve this position with 112 billion nodes. (The solution is known. It's a draw.)

(I'm not interested in testing general strength. That's what all those thousands of engine-engine games are for! I'm interested in seeing how hard this position is for engines.)

[Chessqueen]

Thanks. So SF 14.1 cannot solve this position with 112 billion nodes. (The solution is known. It's a draw.)

(I'm not interested in testing general strength. That's what all those thousands of engine-engine games are for! I'm interested in seeing how hard this position is for engines.)

White to play and mate in 89 moves

[fen]8/N7/qN6/8/8/8/6N1/1k1KN3 w - - 0 1 [/fen]

[jp]

Daniel, did your SF search use any tablebases?

My guess is that they won't help, because after two captures in a main line there are still 8 men on the board.

Is your hardware particularly fast?