Test Position

Discussion of anything and everything relating to chess playing software and machines.

Moderators: bob, hgm, Harvey Williamson

Forum rules
This textbox is used to restore diagrams posted with the [d] tag before the upgrade.
zullil
Posts: 6442
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Test Position

Post by zullil » Fri Aug 07, 2020 8:34 pm

From https://github.com/official-stockfish/S ... -670598949

Easy for Stockfish-nnue, but seems surprisingly hard for Stockfish (with classical evaluation)



[Edit for clarity] This position is difficult for Stockfish-dev even if Use NNUE is set to true. That's because the NNUE evaluation is not actually used because of the "NNUE evaluation threshold" patch.

peter
Posts: 2123
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Test Position

Post by peter » Fri Aug 07, 2020 11:50 pm

zullil wrote:
Fri Aug 07, 2020 8:34 pm
From https://github.com/official-stockfish/S ... -670598949

Easy for Stockfish-nnue, but seems surprisingly hard for Stockfish (with classical evaluation)



[Edit for clarity] This position is difficult for Stockfish-dev even if Use NNUE is set to true. That's because the NNUE evaluation is not actually used because of the "NNUE evaluation threshold" patch.
Very good example, Louis!

viewtopic.php?p=761437#p761437
Peter.

jdart
Posts: 3991
Joined: Fri Mar 10, 2006 4:23 am
Location: http://www.arasanchess.org

Re: Test Position

Post by jdart » Sat Aug 08, 2020 1:11 am

Houdini 6.03 finds this quite rapidly.

--Jon

MOBMAT
Posts: 314
Joined: Sat Feb 04, 2017 10:57 pm
Location: USA

Re: Test Position

Post by MOBMAT » Sat Aug 08, 2020 2:48 am

jdart wrote:
Sat Aug 08, 2020 1:11 am
Houdini 6.03 finds this quite rapidly.

--Jon
As does Crystal 080420

Code: Select all

FEN: r1b1qr1k/2p3pp/4p3/1pb1PpN1/pn3N1P/8/PPP1QPP1/2KR3R w - - 0 1

Crystal 080420:
 8	00:00	 42,260	7,043,333	-3.15	1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.e6 Bxg5+ 5.hxg5
 9	00:00	 136,406	8,525,375	-4.32	1.a3 Nd5 2.Nxd5 exd5 3.e6 b4 4.Rxd5 Be7 5.Nf7+ Kg8 6.Qe3 bxa3
 10	00:00	 477,685	8,380,438	-3.67	1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Kb1 b4 5.axb4 Bb7 6.Ra5 Bxg2 7.Rd1
 11	00:00	 632,317	8,211,909	-3.69	1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Kb1 h6 5.Nf3 b4 6.axb4 Be6 7.Rd4 c5 8.bxc5
 12	00:00	 897,849	7,740,077	-4.41	1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Kb1 h6 5.Nh3 Bb7 6.Nf4 Bxd5 7.Nxd5 Rd8 8.Nxe7 Qxe7
 13	00:00	 2,528,977	7,309,182	-4.40	1.a3 Nd5 2.Qf3 c6 3.h5 Nxf4 4.Qxf4 h6 5.Nh3 Kg8 6.Qd2 b4 7.axb4 Be7 8.Qc3 Rb8 9.Nf4
 14	00:00	 3,228,840	7,207,232	-4.59	1.a3 Nd5 2.Qf3 c6 3.h5 Nxf4 4.Qxf4 h6 5.Nh3 Kg8 6.g4 b4 7.axb4 Be7 8.Qg3 Bxb4 9.Kb1 Qe7
 15	00:01	 7,414,102	7,198,157	-4.94	1.Qf3 c6 2.a3 Nd5 3.h5 Nxf4 4.Qxf4 h6 5.Nh3 Kg8 6.g4 fxg4 7.Qxg4 Qf7 8.Rhg1 Ra7 9.Rd3 Qf5 10.Qxf5 Rxf5 11.Rd8+ Rf8 12.Rxf8+ Kxf8 13.Rg4
 16	00:01	 7,844,968	7,177,463	-4.68	1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ngh3 b4 5.axb4 Bxb4 6.Ng6+ Kg8 7.c3 Be7 8.Kc2 Rb8 9.Nhf4 a3 10.b3 Bg5 11.g3 Bxf4
 17	00:01	 13,073,715	7,144,106	-4.98	1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ngh3 b4 5.axb4 Nxb4 6.c3 Nd5 7.Ng6+ Kg8 8.Nxf8 Bxf8 9.Nf4 a3 10.b3 Bb7 11.Kb1 Nxf4 12.Qxf4 c5
 18	00:02	 19,623,358	7,135,766	-5.07	1.c3 Nd5 2.Nxd5 exd5 3.f4 a3 4.b4 Bb6 5.Rd3 h6 6.Nf3 Be6 7.Qc2 Qe7 8.Nd4 Bxd4 9.Rxd4 Kh7 10.g3 c5 11.bxc5
 19-	00:03	 27,020,504	7,106,918	-5.16	1.c3 Nd5
 19-	00:04	 29,738,286	7,088,983	-5.26	1.c3 Nd5
 19+	00:04	 33,687,030	7,075,620	-5.16	1.Rd8
 19+	00:05	 37,757,908	7,124,133	-0.16	1.Rd8
 19	00:05	 38,537,564	7,132,623	+0.44	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Rf7 6.Nf6+ Kf8 7.Rh8+ Ke7 8.Rxd8 Kxd8 9.Qxf7 gxf6 10.exf6 Bd7 11.g6 Be8 12.Qxe6 Bxg6 13.f7 Bxf7 14.Qxf7 Ra6 15.a3 Nc6 16.Qxf5
 20+	00:05	 39,384,770	7,146,574	+0.53	1.Rd8
 20+	00:05	 39,423,857	7,145,886	+0.64	1.Rd8
 20+	00:08	 62,776,457	7,604,658	+9.48	1.Rd8
 20	00:09	 70,163,890	7,734,967	+9.95	1.Rd8 Qxd8 2.Qh5 Qxg5 3.hxg5 Kg8 4.Qxh7+ Kf7 5.Qg6+ Ke7 6.Qxg7+ Rf7 7.Qg8 Bd4 8.Rd1 c5 9.c3 a3 10.cxd4 axb2+ 11.Kb1 Nd5 12.Ng6+ Kd7 13.Qxf7+ Kc6 14.Qe8+ Kb6 15.dxc5+ Kxc5 16.Kxb2 Kb6
 21+	00:09	 76,721,161	7,807,974	+10.05	1.Rd8
 21+	00:10	 78,347,191	7,831,586	+10.15	1.Rd8
 21+	00:10	 86,620,378	7,919,939	+10.49	1.Rd8
 21	00:11	 87,785,967	7,934,378	+10.21	1.Rd8 Qxd8 2.Qh5 Qxg5 3.hxg5 Kg8 4.Qxh7+ Kf7 5.Qg6+ Ke7 6.Qxg7+ Ke8 7.Qg6+ Kd7 8.Qxe6+ Kd8 9.Rd1+ Bd6 10.Qh6 Bd7 11.exd6 Re8 12.dxc7+ Kc8 13.Qd6 Bc6 14.Qxb4 Kxc7 15.Qc5 Rac8 16.Qxf5 Kb7 17.a3
 22+	00:11	 94,872,282	7,989,244	+10.30	1.Rd8
 22+	00:12	 97,886,696	8,009,057	+10.40	1.Rd8
 22+	00:13	 113,126,285	8,130,977	+10.75	1.Rd8
 22	00:15	 128,941,333	8,225,922	+10.93	1.Rd8 Qxd8 2.Qh5 Qxg5 3.hxg5 Kg8 4.Qxh7+ Kf7 5.Qg6+ Ke7 6.Qxg7+ Rf7 7.Qg8 Bd4 8.Rd1 c5 9.c3 Nd5 10.Ng6+ Kd7 11.Qxf7+ Kc6 12.cxd4 cxd4 13.Rxd4 Kc5 14.Rd1 b4 15.Ne7 Nf4 16.g3 Nh3 17.Nxc8 Rxc8 18.Qxe6
 23-	00:16	 134,631,311	8,248,962	+10.84	1.Rd8 Qxd8
 23-	00:16	 135,683,953	8,255,290	+10.74	1.Rd8 Qxd8
 23+	00:17	 144,085,966	8,290,331	+10.84	1.Rd8
 23+	00:23	 198,621,320	8,466,021	+11.67	1.Rd8
As does SF Exp 230430

Code: Select all

FEN: r1b1qr1k/2p3pp/4p3/1pb1PpN1/pn3N1P/8/PPP1QPP1/2KR3R w - - 0 1

Stockfish Exp 230420:
 8	00:00	 21,172	5,293,000	+50.17	1.Ngxe6 Bxe6 2.a3 Na2+ 3.Kb1
 9	00:00	 25,943	6,485,750	+14.16	1.Ngxe6 Bxe6 2.a3 Na2+ 3.Kb1 Nc3+ 4.Ka1 b4 5.f3 Rd8 6.Rxd8 Nxe2
 10	00:00	 49,248	7,035,428	+30.84	1.Ngxe6 Nxa2+ 2.Kb1 Rb8
 11	00:00	 77,745	7,067,727	+19.55	1.Ngxe6 Bxe6 2.a3 Na2+ 3.Kb1 Bc4 4.Nd3 Bxd3 5.Rxd3
 12	00:00	 183,094	7,323,760	+10.26	1.Kb1 Nc6 2.Qh5 h6 3.c4 Nxe5 4.Rdg1 bxc4 5.Ngxe6 Bxe6 6.Qxe8 Raxe8 7.Rc1 Ba7 8.Nxe6 Rxe6
 13	00:00	 286,717	7,167,925	 0.00	1.Kb1 Nc6 2.Nd3 Bb6 3.Nf7+ Kg8 4.Nh6+ Kh8
 14	00:00	 345,485	7,050,714	+10.49	1.Kb1 Nc6 2.c3 Rb8 3.f3 Ba7 4.Nd3 Rb6 5.Nxe6 Qxe6
 15	00:00	 1,132,395	7,305,774	+8.10	1.a3 Nc6 2.Ngxe6 Rb8 3.Rd5 Bd4 4.Nxc7 Qxe5 5.c3 Qxf4+ 6.Qd2 Bb6 7.Rf1 Qxd2+ 8.Kb1 Bxc7 9.g3 Qxd5
 16	00:00	 2,500,575	7,554,607	+5.41	1.a3 Nc6 2.Rd2 Bb6 3.Rhd1 b4 4.c4 Ra5 5.Ngxe6 Qxe6 6.axb4 Qg8 7.b5 Nd4 8.Kb1 Nxe2
 17	00:00	 2,961,245	7,534,974	+13.13	1.Rd8 Nd3+ 2.cxd3 Be7 3.Ngxe6 Qc6+ 4.Kb1
 18	00:01	 10,977,794	7,830,095	+8.87	1.Rd8 Nd5 2.Nd3 h6 3.Rxe8 Bd7 4.Rxa8 a3 5.Nxc5 axb2+ 6.Kxb2 Rxa8 7.Ngxe6 Be8 8.Qe1 g6 9.Qa1 Ra7 10.Nd4 Ne7 11.c3 Nc8 12.e6 Kg8
 19	00:02	 17,092,414	7,794,078	+1.44	1.Rd8 Nd5 2.Nd3 h6 3.Nf3 Qxd8 4.g3 Bb6 5.Nd2 Qe8 6.Rg1 c5 7.Nf4 Rf7 8.Ng2 Kg8 9.Kb1 Nc3+ 10.bxc3
 20	00:02	 17,798,242	7,795,988	+4.63	1.Rd8 Nxa2+ 2.Kb1 Nc3+ 3.bxc3 Qxd8 4.Qh5 h6 5.Qg6 Qxg5 6.hxg5
 21	00:02	 18,388,867	7,798,501	+8.97	1.Rd8 Nd5 2.Rxe8 Nxf4 3.Qxb5 Kg8 4.g3 Nd3+ 5.Kb1 Nxf2 6.Rxf8+ Bxf8 7.Qe8
 22	00:02	 20,950,774	7,826,213	+11.87	1.Rd8 Nd5 2.Rxe8 Nxf4 3.Qxb5 Kg8 4.Rxf8+ Bxf8 5.Qc6 Rb8 6.Qe8 Bb7 7.Qxb8 Bd5 8.a3 Ng6 9.h5 Ne7 10.h6 c6 11.Qe8
 23+	00:03	 23,672,505	7,872,465	+12.02	1.Rd8
 23+	00:03	 23,897,436	7,879,141	+12.22	1.Rd8
 23+	00:03	 24,409,011	7,894,246	+15.76	1.Rd8
 23-	00:03	 24,417,773	7,894,527	+10.53	1.Rd8 Nd5
 23+	00:03	 25,904,459	7,917,010	+14.36	1.Rd8
 23+	00:03	 30,186,012	7,962,546	+22.25	1.Rd8
 23	00:03	 30,482,399	7,963,009	+20.92	1.Rd8 Nd5 2.Rxe8 Nxf4 3.Qxb5 Bb7 4.Rxf8+ Rxf8 5.Qxb7 Bb6 6.Rf1 h6 7.Nh3 Ng6 8.f4 Rd8 9.g3 Nf8 10.Qc6 Rb8 11.c4 Be3+ 12.Kb1 Bxf4 13.Nxf4 a3 14.Nxe6 Rxb2+ 15.Ka1 Nxe6
 24-	00:03	 30,805,002	7,962,006	+20.82	1.Rd8 Nd5
 24-	00:03	 31,020,850	7,958,145	+20.72	1.Rd8 Nd5
 24-	00:04	 33,883,488	7,944,545	+13.91	1.Rd8 Nd5
 24-	00:04	 36,222,501	7,941,789	+11.86	1.Rd8 Bd7
 24+	00:05	 40,350,518	7,918,076	+13.55	1.Rd8
 24-	00:05	 43,783,249	7,924,569	+9.27	1.Rd8 Bd7
 24+	00:05	 45,413,285	7,925,529	+13.04	1.Rd8
 24-	00:06	 49,915,515	7,920,583	+5.18	1.Rd8 Bd7
 24+	00:06	 51,552,728	7,906,860	+11.68	1.Rd8
 24	00:07	 62,008,847	7,916,359	+17.97	1.Rd8 Nd5 2.Rxe8 Nxf4 3.Qxb5 Bb7 4.Rxf8+ Rxf8 5.Qxb7 Bb6 6.Rf1 Re8 7.Qc6 Rb8 8.Qc4 h6 9.Nh3 Ng6 10.f4 Nf8 11.g3 Ra8 12.Qc6 Rb8 13.c4 Ba5 14.Rf3 g6 15.Ra3
 25-	00:08	 64,474,494	7,914,865	+17.87	1.Rd8 Nd5
 25-	00:08	 64,867,409	7,912,589	+17.74	1.Rd8 Nd5
 25-	00:08	 66,267,534	7,906,876	+16.76	1.Rd8 Nd5
 25-	00:08	 66,295,938	7,906,492	+16.08	1.Rd8
 25-	00:08	 66,365,809	7,906,338	+15.48	1.Rd8
 25-	00:08	 68,012,931	7,910,319	+14.69	1.Rd8 Bd7
 25	00:09	 73,050,665	7,932,529	+8.71	1.Rd8 Bd7
and Lc0 (Leela) likes it from the get go.

Code: Select all

FEN: r1b1qr1k/2p3pp/4p3/1pb1PpN1/pn3N1P/8/PPP1QPP1/2KR3R w - - 0 1

Lc0:
 8	00:00	 914	6,623	-0.24	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Qh5 Bxf2 6.Kb1 Be3 7.g6 Rf6
 8	00:00	 947	6,355	-0.27	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.gxf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3
 8	00:00	 983	6,467	-0.29	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.gxf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 Bf8
 8	00:00	 1,116	6,642	-0.32	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 a3 8.Rh8+ Kxh8
 8	00:00	 1,255	6,857	-0.33	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 Bf8 10.Qh5 gxf6
 9	00:00	 1,312	7,053	-0.32	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 Nxa2+ 8.Kb1 a3 9.Qh7+ Kf8 10.Qh8+
 9	00:00	 1,444	7,184	-0.33	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 a3 8.Qh7+ Kf8 9.Qh8+ Kf7 10.Qxg7+
 9	00:00	 1,529	6,856	-0.30	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 a3 8.Qh7+ Kf8 9.Qh8+ Kf7 10.Qxg7+ Ke8 11.Rh8+ Bf8
 9	00:00	 1,584	6,827	-0.28	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 a3 10.Qh7+ Kf8
 10	00:00	 1,680	6,511	-0.26	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 a3 10.Qh7+ Kf8
 10	00:00	 1,811	6,682	-0.23	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 a3 10.Qh7+ Kf8 11.Qh8+
 11	00:00	 2,125	7,302	-0.11	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 a3 10.Qh7+ Kf8 11.Qh8+
 12	00:00	 2,919	7,997	-0.05	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 a3 10.Qh7+ Kf8 11.Qh8+
 12	00:00	 3,641	8,773	-0.02	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Nxa2+ 6.Kb1 Qd7 7.Nf6+ Rxf6 8.exf6 Nc3+ 9.bxc3 Qf7 10.Qh7+ Kf8 11.Qh8+ Qg8 12.fxg7+ Kf7
 12	00:00	 4,094	9,368	+0.01	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Nxa2+ 6.Kb1 Qd7 7.Nf6+ Rxf6 8.exf6 Nc3+ 9.bxc3 Bf8 10.Qh5 gxf6 11.gxf6 Bg7 12.Qh7+ Kf8 13.Qg6
 13	00:00	 4,590	9,542	+0.04	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Nxa2+ 6.Kb1 Qd7 7.Nf6+ Rxf6 8.exf6 Nc3+ 9.bxc3 Bf8 10.Qh5 gxf6 11.gxf6 Bg7 12.Qh7+ Kf8 13.Qg6
 14	00:00	 8,618	9,837	+0.11	1.Rd8 Nxa2+ 2.Kb1 Qxd8 3.Qh5 h6 4.Qg6 hxg5 5.Qh5+ Kg8 6.hxg5 Nc3+ 7.bxc3 Re8 8.g6 Qh4 9.Rxh4 Kf8 10.Qg5 Kg8 11.Qh5 Kf8
 14	00:00	 8,816	9,677	+0.10	1.Rd8 Nxa2+ 2.Kb1 Qxd8 3.Qh5 h6 4.Qg6 hxg5 5.Qh5+ Kg8 6.hxg5 Nc3+ 7.bxc3 Re8 8.g6 Qh4 9.Rxh4 Kf8 10.Qg5 Kg8 11.Qh5 Kf8
 14	00:00	 9,061	9,701	+0.09	1.Rd8 Nxa2+ 2.Kb1 Qxd8 3.Qh5 h6 4.Qg6 hxg5 5.Qh5+ Kg8 6.hxg5 Nc3+ 7.bxc3 Re8 8.g6 Qh4 9.Rxh4 Kf8 10.Qg5 Kg8 11.Qh5 Kf8
 15	00:01	 15,543	12,365	+0.19	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 16	00:01	 18,842	13,693	+0.15	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 16	00:01	 18,997	13,716	+0.14	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 16	00:01	 22,998	15,301	+0.09	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 17	00:01	 25,590	13,743	+0.12	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 17	00:02	 33,726	14,266	+0.36	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 17	00:03	 45,816	15,145	+0.52	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 18	00:03	 47,078	15,250	+0.54	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 18	00:03	 49,125	15,423	+0.56	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 18	00:03	 50,236	15,504	+0.57	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.exf6 e5 8.Qh7+ Kf8 9.Qg6 Kg8 10.Qh7+ Kf8 11.Qg6 Kg8
 18	00:04	 77,504	17,389	+0.67	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5 4.hxg5+ Kg8 5.Nh5 Qd7 6.Nf6+ Rxf6 7.gxf6 Nxa2+ 8.Kb1 Nc3+ 9.bxc3 Rb8 10.Qh7+ Kf7 11.Qxg7+ Ke8 12.Rh8+ Bf8 13.Qxf8+
But I concur, there were many "top" engines that couldn't find it quickly (<30 seconds)
i7-6700K @ 4.00Ghz (using 6 threads), EGTBs on PCI SSD
Benchmark: Stockfish 11 64 bmi2 (nps): 2067669

User avatar
MikeB
Posts: 4355
Joined: Thu Mar 09, 2006 5:34 am
Location: Pen Argyl, Pennsylvania

Re: Test Position

Post by MikeB » Sat Aug 08, 2020 4:19 am

zullil wrote:
Fri Aug 07, 2020 8:34 pm
From https://github.com/official-stockfish/S ... -670598949

Easy for Stockfish-nnue, but seems surprisingly hard for Stockfish (with classical evaluation)



[Edit for clarity] This position is difficult for Stockfish-dev even if Use NNUE is set to true. That's because the NNUE evaluation is not actually used because of the "NNUE evaluation threshold" patch.
Current Honey

Code: Select all

 39	+7.29 	5.19G	1:25.81	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Rce8 Nxe6 Rxe6 Re1 c6 b3 Rg6 Qb4 Rg8 g3 Bd5 Qc5 Re8 a4 Kh7 Kb2 Rge6 Qd4 R6e7 Re3 Rb7 Kc1 Rbb8 Qc5 Rf8 e6 f4 gxf4 Rxf4 e7 Re8
 38	+7.27 	4.96G	1:21.66	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 c6 Rd1 Nxf4 Qxf4 Bd5 b3 Rfe8 a4 Rb8 g3 Re7 Qd4 Kh7 Rd3 Ree8 Qc3 Re7 Re3 Ra8 Qd3 Be6 Qd6 Rae8 f4 Bd5 Rd3 Re6 Qc5 Rb8 Kb2 Ree8 Rd4 Rb7 Rxd5
 37	80 seconds
 37	70 seconds
 37	+7.18 	3.86G	1:02.94	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Nxf4 Qxf4 Bd5 Rd1 c6 b3 Rfe8 a4 Ra8 g3 Re7 Qd4 Kh7 Re1 Ree8 Qc5 Kg6 Qc3 Kh7 Rd1 Rab8 Rd3 Rb7 h5 Reb8 Qc5 Rb4 f4 Re4 Qd6
 36	60 seconds
 36	+7.10 	3.17G	0:51.16	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Rce8 Rd1 Kg8 Qc4 Nxf4 Qxf4 Re7 Qxf5 Be8 Qe4 Rxf2 b3 Bd7 Qd4 Rf5 Qc4+ Be6 Rd8+ Kf7 Qd4 h5 Kb2 c6 Qe4 Rf2 Qe3 Rf5 Rd6 Bd5 Qg3 Re6 Rd7+ Ke8 
 35	50 seconds
 35	+6.93 	2.76G	0:44.32	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Ra8 Qc4 Nxf4 Qxf4 c6 Rd1 Bd5 f3 Rf7 a4 Re8 Qb4 Rfe7 Re1 Be6 Qc5 Rb7 b3 Reb8 Re3 f4 Rd3 Bd5 Qd6 Re8 Rd4 Kh7 Rb4 Rf7 Rb8 Re6
 34	40 seconds
 34	+6.88 	2.24G	0:35.64	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Nxf4 Qxf4 Bd5 Rd1 c6 b3 Rfe8 Qe3 Bxg2 Rd7 Bd5 Qg3 Rg8 Kb2 Kh7 a4 Kh8 Qg6 Be4 Qd6 c5 e6 c4 b4 Kh7 Qe5 c3+ Kb3 Kg6 e7 Kh5
 33	30 seconds
 33	+6.69 	1.42G	0:22.41	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Rce8 Rd1 Kh7 Nxe6 Rxe6 Qd7 Rxe5 Qxc7 Re2 Rd7 Kg8 Rd8 Rxd8 Qxd8+ Kh7 Qd4 Re4 Qd3 Bg6 Qd5 Rxh4 Kd2 Rh1 Qd4 Bh5 Qe5 Rd1+ Kc3 Bg6 f3
 32	+6.77 	1.34G	0:20.96	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Rce8 Rd1 c5 Rd6 Nxf4 Qxf4 Bg8 Rd7 c4 Qg3 Bf7 f4 Re6 h5 Rb6 Rd6 Rb7 Qh4 Re8 Rd8 Kh7 Rxe8 Bxe8
 31	20 seconds
 31	+6.46 	768.5M	0:11.80	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 c5 Nf4 Re8 Qa6 Ne6 Nxe6 Bxe6 Rd1 c4 Rd6 Bg8 Qa7 Be6 c3 Kh7 Qa6 Bg8 f4 Rc7 Qb6 Ree7 Rd8 Rb7 Qd4 Bf7
 30	+6.51 	654.9M	0:10.02	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Rc8 Nh3 Bf7 Qxa4 Ne6 Nf4 Nxf4 Qxf4 Be6 Rd1 Kh7 Qf3 Rce8 Qc6 f4 b4 Re7 Qc5 Ref7 b5 Kg6 a4 Kh5 Qd4 Kxh4 Kb2 Rb8
 29	10 seconds
 29	+6.34 	471.2M	0:07.21	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qe2 Nxe6 Nxe6 Rg8 Nxc7 Ra7 Nxe8 Rxe8 Rd1 Rb8 Qc4 Rab7 Qxa4 Rb5 f4 Rxb2 Rd8+ Rxd8 Kxb2 Bxh4 Ka2 g5 Qc4 Rd2 Qc8+ Kg7 Qxf5 Rxg2
 28	+6.32 	387.9M	0:05.92	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Nc6 Ne6 Rf7 Re1 Ra5 Qc3 Rd7 Nf4 Kh7 e6 Rd4 g3 Rd6 e7 Bd7 Nd3 Ra7 Kb1 Nd4 Qc4
 27	+6.11 	323.1M	0:04.91	Rd8 Nxa2+ Kb1 Bd7 Rxe8 Bxe8 Nfxe6 b4 Kxa2 b3+ Kb1 a3 cxb3 axb2 Nxc5 Ra1+ Kxb2 Rxh1 Nge6 Rg8 Nxc7 Bg6 e6 f4 Qe5 Rg1 Ka3 Rxg2 Qxf4 Rg1 Nd5 Ra8+ Kb4
 26	+6.06 	238.4M	0:03.61	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qe2 Bxg5+ Nxg5 h6 Qc4 Nc6 Ne6 Rf7 Re1 Rb8 Nf4 Rd7 Qc5 Nd4 e6 Rd6 e7 Rc8 Qe5 Bf7 Rd1 Nxc2 Kxc2 Bb3+ Kc3 Rxd1 e8=Q+ Rxe8 Qxe8+ Kh7
 25	+6.00 	173.6M	0:02.63	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qe2 Nxe6 Nxe6 Rg8 Nxc7 Ra5 Nxe8 Rxe8 Rd1 Bc5 Rd7 Bxf2 e6 Bg3 Qh5 Rg8 Qg5 Re5 Qxg3 Rxe6 h5
 24	+5.72 	91.4M  	0:01.39	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qd3 Bxg5+ Nxg5 h6 Qc4 c6 e6 Bh5 e7 Re8 Qc5 hxg5 hxg5 g6 exd8=Q Raxd8 Qxc6 Re2 Kb1
 23	+5.27 	54.0M  	0:00.82	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qd3 Bxg5+ Nxg5 h6 Qc4 c6 e6 Rf6 Qb4 c5 Qxc5 Kg8 Nf3 Nxe6 Qc4 Rg6 Re1 Bf7 Ne5
 22	+5.39 	50.8M  	0:00.77	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qd3 Bxg5+ Nxg5 Bc6 e6 Nb7 Re1 Ra5 Qg3 Rc5 Qxc7 Bxg2 e7 Re8
 21	+4.78 	24.7M  	0:00.38	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qd5 c6 Qd3 Nxe6 Nxe6 Rg8 Qxf5 Rb8 Rd1 Bxh4 Qf4 Be7 Qxa4 Bg6 Qg4
 20	+4.26 	18.7M  	0:00.28	Rd8 Bd7 Rxe8 Nxa2+ Kb1 Bxe8 Nfxe6 b4 Kxa2 b3+ Kb1 Ra5 cxb3 axb3 Qc4 Bg6 Qxb3 f4+ Kc1 Ra1+ Kd2 Rxh1 Nxc5 Rd8+ Ke2
 19	+3.54 	13.7M  	0:00.20	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 Nh5 Qe7 Nf6 Rxf6 hxg5+ Kg8 gxf6 Rb8 Qh7+ Kf7 Qxg7+ Ke8 fxe7 Bxe7 Rh8+ Kd7 Qg8 Bb7
 18	+3.14 	10.4M  	0:00.16	Rd8 Nxa2+ Kb1 Nc1 Kxc1 Qxd8 Qh5 h6 Qg6 hxg5 Nh5 Qd7 hxg5 Kg8 Nf6+ Rxf6 gxf6 Qf7 Rh8+ Kxh8 Qxf7
 17	+2.77 	8.75M  	0:00.14	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 hxg5+ Kg8 Nh5 Rf7 Nf6+ Kf8 Rh8+ Ke7 Rxd8 Kxd8 Qxf7 c6 Qg8+ Kc7 Qxg7+ Kb6 Qg8 Bb7 Qxe6 Rd8 Qxf5
 16	+2.47 	8.32M  	0:00.14	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 hxg5+ Kg8 Nh5 Rf7 Nf6+ Kf8 Rh8+ Ke7 Rxd8 Kxd8 Qxf7 c6 Qg8+ Kc7 Qxg7+ Kb6 Qg8
 15	+2.54 	7.97M  	0:00.13	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 hxg5+ Kg8 Nh5 Nxa2+ Kb1 Rf7 Nf6+ Kf8 Rh8+ Ke7 Rxd8 Kxd8
 14	 -2.30 	3.76M  	0:00.07	c3 Nd5 Nxd5 exd5 Rxd5 Be7 e6 b4 c4 a3 b3 h6 Re5 Kg8 Kb1 c6 Nf7
 13	 -2.51 	1.34M  	0:00.03	a3 Nd5 Nxd5 exd5 e6 c6 Rhe1 Ra7 Qe5 h6 Qc3 Bb6 g3 Re7 Nf7+ Rexf7 exf7
 12	 -2.43 	737381	0:00.02	a3 Nd5 Nxd5 exd5 e6 c6 Qd3 b4 Rhe1 Ra7 axb4 Bxb4 Qd4
 11	 -2.55 	537347	0:00.01	a3 Nd5 Nxd5 exd5 e6 c6 Rde1 Ra7 Qd3
 10	 -2.48 	444217	0:00.01	a3 Nd5 Rxd5 exd5 Nxd5 Ra7 e6 c6
  9	 -2.06 	197156	0:00.01	Kb1 c6 h5 h6 c3 hxg5 h6 gxf4
  8	 -2.33 	177404	0:00.01	Kb1 c6 c4 bxc4 Qxc4 Be7 a3 Nd5
  7	 -1.16 	90523  	0:00.00	Kb1 Rb8 h5 h6
  6	 -1.97 	66343  	0:00.00	Qf3 Rb8 h5
  5	 -2.03 	61163  	0:00.00	Qf3 Rb8 Qh3 Bxf2
  4	 -2.41 	55600  	0:00.00	Qf3 c6 Kb1 Nd5
  3	 -2.02 	48438  	0:00.00	Qf3 Nc6 Kb1
  2	 -4.00 	25665  	0:00.00	Nf7+ Qxf7
  1	NNUE evaluation using eval.bin enabled.
  1	 -4.14 	4127    	0:00.00	Ng6+ Qxg6 Qxb5
  0	#
Bluefish was actually a hair faster ..

Code: Select all

	mover viewpoint		fewer / Multi-PV setting = 1 / more
exclude: none best +tail                                          
dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 31	40 seconds
 31	+7.13 	2.12G	0:36.09	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 h6 Qf3 c6 Nxf8 Bxf8 h5 Nd5 Nxd5 cxd5 Qxf5 Kg8 Qe6+ Kh7 Qxd5 Rc8 Kb1 Rb8 f4 Kh8 g4 b4 axb4 Bxb4 Ka2 Bf8 Rd1 Bb5 c4 Be8 Rb1 Be7 Qe6 Bf8 f5 Bc5
 30	+7.17 	1.88G	0:31.93	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 h6 Qf3 c6 Nxf8 Bxf8 h5 Nd5 Nxd5 cxd5 Qxf5 Be7 Kb1 d4 Rd1 Rd8 Qe6 Bc5 g4 Bf8 f4 Kh7 f5 b4 axb4 a3 bxa3 Bb5 Kc1 Be2 Qf7 Bxd1 Kxd1
 29	30 seconds
 29	+6.84 	1.25G	0:20.96	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 c6 Nxf8 Nd5 Nxd5 cxd5 h5 Bxf8 e6 Be7 h6 Bf6 Qd2 Bg6 Qxd5 Rb8 hxg7+ Kxg7 Qc5 Rb7 f4 h5 Re1 Be8 Qxf5 Rc7 e7 Rc6 Qxb5 Rxc2+ Kxc2 Bxb5 e8=Q Bxe8 Rxe8 h4 Kd2 Bxb2
 28	20 seconds
 28	+6.88 	789.1M	0:12.95	Rd8 Bd7 Rxe8 Bxe8 a3 Bf7 Nxf7+ Rxf7 Nxe6 Na2+ Kb1 Nc3+ bxc3 Bxa3 Qf3 Re8 Ng5 Rfe7 Qxf5 g6 Qf4 Rg7 e6 h5 Qe5 Bf8 f4 a3 Ka1 b4 cxb4 Bxb4 Ka2 Be7 Qxc7
 27	10 seconds
 27	+6.70 	556.0M	0:09.04	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 Rf7 Nxc7 Bg5 Nxa8 Bxf4+ Kb1 Nc6 Qxb5 h6 e6 Rf6 e7 Be5 Nb6 Rg6 Qxa4 f4 Qa8 Bb8 Nd5 Rxg2
 26	+6.33 	353.1M	0:05.68	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 c6 Nxf8 Bxf8 h5 h6 Qf3 Nd5 Nxd5 cxd5 Qxf5 Be7 Qe6 Bg5+ Kb1 d4 Qf5 Kg8 f4 Be7 Rd1 Rd8 g4 Bd7 e6 Be8 Qe4 Bf6 Re1 Be7 Rh1 Bf6 e7 Rd7 Qe6+ Kh7
 25	+6.45 	332.2M	0:05.35	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 c6 Nxf8 Bxf8 h5 h6 Qf3 Nd5 Nxd5 cxd5 Qxf5 Be7 Kb1 d4 Rd1 Rd8 f4 Bc5 g4 b4 e6 Be7 axb4 Bxb4
 24	+6.19 	271.1M	0:04.37	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 c6 Nxf8 Bxf8 h5 h6 Qf3 Nd5 Nxd5 cxd5 Qxf5 Be7 Kb1 d4 Qe6 Bf8 Qd5 Rc8 Qb7 Rd8 Ka1 b4
 23	+6.04 	142.1M	0:02.27	Rd8 Bd7 Rxe8 Bxe8 a3 Na6 Qf3 c6 Nfxe6 b4 axb4 Be7 Nxf8 Nxb4 Qxf5 g6 Qe6 Bxf8 Rd1 Nd5 Rxd5 a3 bxa3 cxd5 Kd2 Bh6
 22	+5.96 	110.5M	0:01.75	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Ngxe6 c6 Nxf8 Bxf8 h5 Nd5 Nxd5 cxd5 e6 Be7 h6 gxh6 Qe5+ Kg8 Qxd5 Rc8 Qb7 Bg5+ Kb1 Rc4 f3 Bf6 Re1 Kf8 Qxh7
 21	+5.40 	47.0M  	0:00.73	Rd8 Nxa2+ Kb1 Bd7 Rxe8 Bxe8 Nfxe6 a3 Qf3 Ra5 Kxa2 b4 b3 Be7 Qf4 Rf7 Rd1 c5 Nxf7+ Bxf7 Qxf5 Bg8
 20	+5.03 	27.1M  	0:00.42	Rd8 Bd7 Rxe8 Nxa2+ Kb1 Bxe8 Nfxe6 b4 Kxa2 b3+ Kb1 Ra5 Qc4 Rg8 cxb3 Bb6 bxa4 Rxa4 Qc2 h6
 19	+4.66 	18.7M  	0:00.29	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 Nh5 Qe7 hxg5 Kg8 Nf6+ Rxf6 gxf6 Rb8 Qh7+ Kf8 Qh8+ Kf7 Qxg7+ Ke8 fxe7 Bxe7 Rh8+ Kd7 Qf7
 18	+2.55 	7.31M  	0:00.12	Rd8 Qxd8 Qh5 h6 Qg6 Be3+ fxe3 hxg5 hxg5+ Kg8 Nh5 Nxa2+ Kb1 Nc3+ bxc3
 17	+1.81 	6.55M  	0:00.11	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 hxg5+ Kg8 Nh5 Nxa2+ Kb1 Qd7 Nf6+ Rxf6 gxf6 Nc3+ bxc3 Qf7 Rh8+ Kxh8
 16	+0.48 	5.80M  	0:00.10	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 hxg5+ Kg8 Nh5 Rf7 Nf6+ Rxf6 gxf6 Nxa2+ Kb1 Qf8 Rh7
 15	 -0.25 	5.48M  	0:00.10	Rd8 Qxd8 Qh5 h6 Qg6 Nxa2+ Kb1 hxg5 hxg5+ Kg8 Nh5 Rf7 Nf6+ Rxf6 exf6 Qf8 Rh7
 14	 -0.87 	5.43M  	0:00.10	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 hxg5+ Kg8 Nh5 Qd7 Nf6+ Rxf6 exf6
 13	 -2.59 	3.98M  	0:00.07	a3 Nd5 Nxd5 exd5 e6 c6 Rhe1 Ra7 g4 b4 Qd3 Bxf2 gxf5 Bxh4 Rg1 Re7 axb4
 12	 -2.28 	898491	0:00.02	Kb1 Nd5 Rxd5 exd5 e6 Bd6 Re1 Bxf4 e7 Rg8 Nf7+ Qxf7 e8=Q Rxe8 Qxe8+ Qg8
 11	 -2.20 	534567	0:00.01	a3 Nd5 Rxd5 exd5 Nxd5 Ra7 e6 c6 Nf4 Bd6 Qd2 Bxf4 Qxf4
 10	 -2.23 	278264	0:00.01	a3 Nd5 Nxd5 exd5 Rxd5 Be7 e6 Kg8 Re5 b4 axb4 h6 Nf7
  9	 -1.99 	263939	0:00.01	a3 Nd5 Nxd5 exd5 Rxd5 Be7 e6 Kg8 Nf7 Rxf7
  8	 -1.97 	120272	0:00.00	Qf3 Rb8 Qa3 Be7 Ngxe6 Bxe6 Nxe6
  7	 -1.97 	103328	0:00.00	h5 h6 Ng6+ Kg8 a3 hxg5 axb4 Bxb4
  6	 -1.95 	84825  	0:00.00	Qf3 Nc6 h5 h6 Qc3 Bxf2
  5	 -1.82 	66062  	0:00.00	Qf3 Nc6 Ng6+ hxg6
  4	 -4.09 	56113  	0:00.00	Ng6+ Qxg6 f4 c6
  3	 -4.21 	52161  	0:00.00	Ng6+ Qxg6 a3
  2	 -4.05 	40940  	0:00.00	Ng6+ Qxg6
  1	NNUE evaluation using eval.bin enabled.
  1	 -4.14 	12928  	0:00.00	Ng6+ Qxg6
  0	#
and sadly, as you noted - cur-dev SF now struggles

Code: Select all

	mover viewpoint		fewer / Multi-PV setting = 1 / more
exclude: none best +tail                                          
dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 40	110 seconds
 40	 -4.23 	7.79G	1:47.41	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Re3 Bc4 Rb7 Bd6 g3 h6 Nf3 Bxa2+ Kc1 f4 gxf4 Bxf4 Ne5 Bxe6 Nd3 Bxe3+ fxe3 Rec8 h5 c5 Nf4 Bf7 Kd2 c4 Ng6 Rc5 Nf4 c3+ Ke2 Ra2 Rb6 Bxh5+ Nxh5 Rxh5 Kd3
 39	100 seconds
 39	 -4.34 	7.11G	1:38.15	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 f4 Bc4 Rb7 Bd6 g3 h6 Nf7 Ba3 Ne5 Bd5 Rb5 Bxa2+ Kxa2 Bb4+ Kb3 Bxe1 g4 fxg4 Nxg4 Rxe6 Ne5 Rea6 Nd3 Bxh4 Ne5 Bf6 Rc5 h5 Kc3 h4 Kd3 Ra3+ Ke4
 38	 -4.36 	6.65G	1:31.85	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Re5 Bc4 Rxf5 Red8 Rb3 Bf6 Rxf6 gxf6 Ne4 Bxb3 axb3 Kg7 f3 Rd1+ Kb2 Re8 g4 Rf1 g5 f5 Nf6 Rxe6 Nh5+ Kf7 Nf4 Rxf3 Nxe6 Kxe6 h5 Rh3 g6 hxg6 hxg6 Kf6 g7 K
 37	90 seconds
 37	 -4.36 	6.51G	1:30.00	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Re5 Bc4 Rxf5 Red8 Rb3 Bf6 Rxf6 gxf6 Ne4 Bxb3 axb3 Kg7 f3 Rd1+ Kb2 Re8 g4 Rf1 g5 f5 Nf6 Rxe6 Nh5+ Kf7 Nf4 Rxf3 Nxe6 Kxe6 h5 Rh3 g6 hxg6 hxg6 Kf6 g7
 37	 -4.37 	6.03G	1:23.44	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qd3 h6 Nf7 Bf6 Qxf5 Ra6 Qg6 Bxe6 Nxh6+ Kh8 Qxe8 Rxe8 Ng4 Bxe5 Nxe5 Rxa2 Nf7+ Kg8 Nd6 cxd6 Rxe6 Rxe6 Kxa2 Re2 Kxb2 Rxf2 g3 Rf3 g4 Kh7 Kc1 Kh6 Kd2 Rh3 Kd1 b4
 36	80 seconds
 36	 -4.37 	5.78G	1:20.00	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qd3 h6 Nf7 Bf6 Qxf5 Ra6 Qg6 Bxe6 Nxh6+ Kh8 Qxe8 Rxe8 Ng4 Bxe5 Nxe5 Rxa2 Nf7+ Kg8 Nd6 cxd6 Rxe6 Rxe6 Kxa2 Re2 Kxb2 Rxf2 g3 Rf3 g4 Kh7 Kc1 Kh6 Kd2 Rh3 Kd1
 36	 -4.36 	5.38G	1:14.44	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Nf3 Bf6 Kc1 Bc4 Rb4 Bxa2 Re3 Bxe6 Nd4 Ra1+ Kd2 Rd8 Rxe6 Bxd4 Ke2 Bc3 Rc4 Re1+ Kf3 Rxe6 Rxc3 c6 g4 fxg4+ Kxg4 Kf7 h5 Rd4+ Kf3 Rd5 Rb3 Rxh5 Rb7+ Kf6 K
 35	70 seconds
 35	60 seconds
 35	 -4.36 	5.05G	1:10.00	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Nf3 Bf6 Kc1 Bc4 Rb4 Bxa2 Re3 Bxe6 Nd4 Ra1+ Kd2 Rd8 Rxe6 Bxd4 Ke2 Bc3 Rc4 Re1+ Kf3 Rxe6 Rxc3 c6 g4 fxg4+ Kxg4 Kf7 h5 Rd4+ Kf3 Rd5 Rb3 Rxh5 Rb7+ Kf6 K
 35	 -4.32 	4.32G	1:00.00	Kb1
 35	 -4.26 	3.75G	0:52.15	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Nh3 Bc4 Nf4 Bxh4 Re5 Bf6 Rxf5 Bxb2 Kxb2 Rxa2+ Kc3 Bxe6 Rc5 Ra7 Nxe6 Rxe6 f4 Kf7 Kd2 h6 g4 Re8 Rf5+ Kg6 Rh5 Kf6 g5+ Kg6 Rh2 h5 f5+ Kxg5
 34	50 seconds
 34	 -3.97 	3.05G	0:42.52	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re5 Kg8 Qxb5 Qxb5 Rxb5 axb2 Re1 Ba6 Rxb2 Bc4 c3 Ba3 Rb3 Bxb3 axb3 Rfb8 b4 c5 Kc2 cxb4 cxb4 Bxb4 Rb1 Rb6 h5 h6 Nf3 Ra2+ Kd3 Rxf2 Nd4 Rd2+ Ke3 f4+ Ke4 Rxg2 Kxf4
 33	 -4.14 	2.96G	0:41.26	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re5 axb2 Re1 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Nf3 Bf6 e7 Bxe7 a4 Bc4 Nd4 Ba3 Rxe8+ Rxe8 Ka1 Bxb2+ Kxb2 f4 Kc3 Bd5 f3 Kf7 a5 Bb7 Kb4 Re5 Nb5 Re2 c4 Rb2+ Kc3 Rxg2 Nxc7 Bxf3 Nd5 Bxd5 cxd5 f3 Kd3 f2
 32	40 seconds
 32	 -4.27 	2.87G	0:40.00	Kb1
 32	 -4.15 	2.17G	0:30.32	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 Rd2 a3 b3 f4 e6 Qg6 Rd5 h6 Qe4 Qxe4 Nxe4 b4 Re5 Ra6 Re1 Rc6 h5 Re8 f3 Rxe6 Rxe6 Bxe6 Kc1 Bf7 Nf2 Bc5 Rxe8+ Bxe8 Nd3 Be3+ Kd1 c5 Ne5 Bxh5
 31	30 seconds
 31	 -4.06 	1.58G	0:22.09	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re5 axb2 Re1 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Bc4 g3 Bf6 Kc1 Bc3 Re3 Bxb2+ Kxb2 Rfe8 Re5 h6 Nf3 Rxe6 Rxf5 Rxa2+ Kc3 Rd6 Nd4 Bf7 Rb5 Ra3+ Kb2
 30	 -4.10 	1.51G	0:21.19	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 Rdd1 a3 b3 h6 Nf3 c5 Rhe1 Be6 Rd6 Bxd6 exd6 Bd5 Ne5 Qe6 h5 Qxd6 Ng6+ Kh7 Nxf8+ Rxf8 Qe5 Qxe5 Rxe5 Bxg2 Kc1 Bf3 c3 Bxh5 Rxc5 Re8 Rxf5 Re1+ Kd2 Re2+ Kd3 Rxa2 Rxb5 Rxf2 Rxh5
 29	20 seconds
 29	 -4.10 	1.43G	0:20.00	Kb1
 29	 -3.95 	927.9M	0:12.97	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 Rd2 a3 b3 f4 e6 Qg6 Rd5 h6 Qe4 Qxe4 Nxe4 b4 Re5 Ra6 Kc1 Rxe6 Rxe6 Bxe6 Kd2 f3 g3 c5 Ke3 Kh7 Rg1 c4 Rd1 Rf5 bxc4 Bxc4 g4 Re5
 28	 -3.63 	787.7M	0:10.97	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 Rdd1 a3 b3 h6 Nh3 f4 Qf3 Bf5 Nxf4 Bb4 Qe3 Qc6 Nd3 Qc3 Qe1 Qxe1 Nxe1 Rad8 Rxd8 Rxd8 Nd3 Bc3 e6 Bxe6 f3 b4
 27	10 seconds
 27	 -3.88 	712.8M	0:09.89	Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 Rhd1 h6 Nf3 c6 R5d2 a3 b3 c5 Rd5 Ra6 e6 Rxe6 Ne5 c4 h5 Bb4 Rd8 Qxd8 Rxd8 Rxd8 Nf7+ Kg8 Ne5 Bc3
 26	 -3.57 	226.1M	0:03.17	Qf3 c6 a3 Nd5 h5 h6 Ngh3 Kg8 c3 Rf7 Rhe1 Bb7 Qg3 Re7 Re2 Bb6 Qg6 Rd8 Red2 Bc7 Nd3 Nb6 Nc5 Rxd2 Rxd2 Bc8 Re2 Nc4 Nd3 Bb6 Nhf4 Bb7 Qg3
 25	 -3.58 	176.6M	0:02.47	Kb1 a3 Qf3 Ra6 b3 Be7 Rd2 Rc6 Re2 Nd5 Nxd5 exd5 Qxd5 Bb7 Qd2 b4 f4 h6 Nf3 Rc3 Nd4 Be4 Re3 c5 Ne6 Rxc2
 24	 -3.62 	156.2M	0:02.17	Kb1 a3 Qf3 Ra6 bxa3 Nd5 Nfxe6 Bxe6 Nxe6 Rxe6 Rxd5 Rxe5 h5 h6 Rhd1 Rxd5 Rxd5 Qe1+ Qd1 Qxf2 Qd2 Qxd2 Rxd2 Bxa3 c3 Be7 Rd5 c6 Re5 Bf6 Rxf5
 23	 -3.36 	90.5M  	0:01.25	Qf3 c6 a3 Nd5 h5 h6 Ngh3 Rf7 Ng6+ Kh7 c3 Bb7 Qg3 Bb6 Rhe1 Kg8 Nhf4 Rd7 Kb1 c5 f3 b4 c4 Nxf4 Nxf4 bxa3 Rd6 Rxd6 exd6 axb2 Kxb2
 22	 -3.55 	86.7M  	0:01.20	Qf3 c6 a3 Nd5 h5 h6 Ngh3 Kg8 c3 Bb6 Ng6 Rf7 Rhg1 Kh7 Nhf4 Bb7 Qg3 c5 Nxd5 exd5 Rge1 d4 Nf4
 21	 -3.56 	56.2M  	0:00.77	Kb1 a3 b3 h6 Qf3 Ra6 Ngh3 Nc6 Qc3 Bb4 Qe3 Ne7 h5 Kh7 f3 Ba5 c3 Rg8 Rhe1 b4 c4 Bb6 Qd2 Nc6 Nd3 Bd4 Nxb4 Nxb4 Qxd4
 20	 -3.60 	51.0M  	0:00.69	Kb1 a3 b3 h6 Qf3 Ra6 Ngh3 Nc6 Qc3 Bb4 Qe3 Ne7 Ng1 Bb7 Nge2 Kg8 f3 Nd5 Nxd5 Bxd5 Nf4 Qc6 Ng6
 19	 -3.34 	27.9M  	0:00.38	a3 Nd5 Ngxe6 Bxe6 Nxd5 Qc6 Qf3 Bxf2 h5 h6 Kb1 Bg3 Ne7 Qxf3 gxf3 Rfe8 Ng6+ Kg8 f4 Rad8 Rdf1 Kh7 Rfg1
 18	 -3.49 	25.3M  	0:00.35	a3 Nd5 Ngxe6 Bxe6 Nxd5 Qc6 Qf3 Bxd5 Qxd5 Qb6 Kb1 b4 axb4 Bxb4 Qd4 Bc5 Qc3 Bxf2 h5 h6 Rd7
 17	 -3.24 	11.4M  	0:00.16	Kb1 a3 c3 Nd5 Nxd5 exd5 b4 Be7 f4 Qc6 Rd3 d4 Qf3 Bb7 Qxc6 Bxc6 Rxd4 Bxg2 Rhd1
 16	 -3.28 	6.90M  	0:00.10	a3 Nd5 Nxd5 exd5 Rxd5 Be7 e6 b4 Qd3 Ba6 Qg3 bxa3 bxa3 h6 Nf7+ Rxf7 exf7 Qxf7 Rhd1 Qf8 R1d4
 15	 -3.19 	6.31M  	0:00.09	a3 Nd5 Nxd5 exd5 Rxd5 Be7 e6 b4 Qd3 Ba6 Qg3 bxa3 bxa3 Bc4 Rd7 Rf6 Rxc7
 14	 -3.27 	4.17M  	0:00.06	a3 Nd5 Qf3 c6 h5 Nxf4 Qxf4 h6 Nh3 Rb8 Qg3 Be7 Qg6 b4 Qxe8 Rxe8 Nf4 Bg5
 13	 -2.88 	1.71M  	0:00.02	a3 Nc6 Kb1 Kg8 Qxb5 Bxf2 Qc4 Nxe5 Qxc7 Ng4 Qd6 Ra6
 12	 -2.98 	959663	0:00.01	a3 Nc6 Qxb5 Bxf2 Qe2 Bg3 Qe3 Bxf4 Qxf4 h6 Nf3 Bb7
 11	 -3.09 	716332	0:00.01	Kb1 Nc6 c3 h6 Nf3 Kg8 Nd4 Bxd4 cxd4 b4 d5 exd5 Nxd5
 10	 -3.04 	511949	0:00.01	a3 Nc6 Qxb5 Bxf2 Qe2 Bb6 Kb1 Ra5 Nf3 Ba6 Qe1
  9	 -3.01 	351542	0:00.01	Qf3 Nc6 a3 b4 axb4 Bxb4 c3 Be7 Kb1
  8	 -2.96 	279542	0:00.01	c3 Nc6 a3 Na5 Kb1 h6 Nf3 Nb3 Nd4 Bxd4 cxd4
  7	 -1.80 	76187  	0:00.00	c3 Nxa2+ Kb1 a3 Kxa2 axb2+ Kxb2 b4
  6	 -1.76 	68841  	0:00.00	c3 Nxa2+ Kb1 a3 Kxa2 axb2+ Kxb2 h6
  5	 -1.55 	61157  	0:00.00	c3 Nxa2+ Kb1
  4	 -2.40 	55687  	0:00.00	c3 Na6 h5 h6
  3	 -2.40 	49967  	0:00.00	c3 Na6 h5
  2	 -1.76 	34625  	0:00.00	a3 Nc6
  1	NNUE evaluation using eval.bin enabled.
  1	 -2.41 	5041    	0:00.00	a3
  0	#
and Black Diamond is the fastest in my barn.... 0.04 secs

Code: Select all

	mover viewpoint		fewer / Multi-PV setting = 1 / more
exclude: none best +tail                                          
dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 27	70 seconds
 27	+8.75 	3.99G	1:10.01	Rd8 Qxd8 Qh5 Qxg5 hxg5 Kg8 Qxh7+ Kf7 Qg6+ Ke7 Qxg7+ Rf7 Qg8 Bd4 g6 Bxe5 gxf7 Bxf4+ Kd1 Bb7 f8=Q+ Rxf8 Rh7+ Kd6 Qxf8+ Kc6 Qxb4 Be5 Qa5 Bd6 Ke2 f4 Rh5 e5 Rh8 Bc5 Rb8 a3 Rxb7 Kxb7 Qxb5+ Bb6 bxa3 e4 Qd5+ Ka7 Qxe4 f3+ gxf3 Kb8
 27	+8.67 	3.49G	1:00.92	Rd8 Qxd8 Qh5 Qxg5 hxg5 Kg8 Qxh7+ Kf7 Qg6+ Ke7 Qxg7+ Rf7 Qg8 Bd4 g6 Bxe5 gxf7 Bxf4+ Kd1 Bb7 f8=Q+ Rxf8 Rh7+ Kd6 Qxf8+ Kc6 Qxb4 Be5 Qa5 Bd6 Ke2 f4 Rh5 e5 Rh8 Bc5 Rb8 a3 Rxb7 Kxb7 Qxb5+ Bb6 bxa3 e4 Qd5+ Ka7 Qxe4 f3+ gxf3 Kb8 Qb4
 26	60 seconds
 26	+8.61 	2.88G	0:50.04	Rd8 Qxd8 Qh5 Qxg5 hxg5 Kg8 Qxh7+ Kf7 Qg6+ Ke7 Qxg7+ Rf7 Qg8 Kd7 Qxf7+ Kc6 Nxe6 Bxe6 Qxe6+ Kb7 a3 Ra6 Qxf5 Nc6 g6 b4 g7 bxa3 bxa3 Ne7 Qf3+ c6 Rh8 Kc7 Kd2 Rb6 Qf7 Rb2 Qxe7+ Bxe7
 25	50 seconds
 25	40 seconds
 25	+8.58 	2.32G	0:40.01	Rd8
 25	+8.49 	2.24G	0:38.64	Rd8 Qxd8 Qh5 Qxg5 hxg5 Kg8 Qxh7+ Kf7 Qg6+ Ke7 Qxg7+ Rf7 Qg8 Bd4 g6 Bxe5 gxf7 Bxf4+ Kd1 Bb7 f8=Q+ Rxf8 Rh7+ Kd6 Qxf8+ Kc6 Qxb4 Bd6 Qa5 e5 Ke2 f4 Rh8 e4 Qa7 Bc5 Rh6+ Bd6 a3 e3 fxe3 fxe3 Rxd6+ cxd6 Kxe3 Bc8 Qa8+ Kb6 Qxc8
 24	30 seconds
 24	+8.38 	1.75G	0:30.01	Rd8 Qxd8 Qh5 Qxg5 hxg5 Kg8 Qxh7+ Kf7 Qg6+ Ke7 Qxg7+ Rf7 Qg8 Bd4 g6 Bxe5 gxf7 Bxf4+ Kd1 Bb7 f8=Q+ Rxf8 Rh7+ Kd6 Qxf8+ Kc6 Qxb4 Bd6 Qa5 b4 Ke1 f4 Rh5 e5 Rh6 b3 Qxa4+ Kc5 Qa7+ Kb5 Qxb7+ Kc4 Qxb3+
 24	+8.29 	1.72G	0:29.42	Rd8 Qxd8 Qh5 Qxg5 hxg5 Kg8 Qxh7+ Kf7 Qg6+ Ke7 Qxg7+ Rf7 Qg8 Bd4 g6 Bxe5 gxf7 Bxf4+ Kd1 Bb7 f8=Q+ Rxf8 Rh7+ Kd6 Qxf8+ Kc6 Qxb4 Bd6 Qa5 b4 Ke1 f4 Rh5 e5 Rh6 b3 Qxa4+ Kc5 Qa7+ Kb5 Qxb7+ Kc4 Qxb3+ Kc5
 23	+8.20 	1.32G	0:22.27	Rd8 Nd5 Nxd5 Qg6 Nf4 Rxd8 Nxg6+ hxg6 h5 Kg8 hxg6 Kf8 Qh5 Ke7 Qh7 Kd7 Rd1+ Kc6 Rxd8 Bxf2 Rd3 b4 Qxg7 a3 bxa3 Rxa3 Rxa3 bxa3 Kd2 Bg3 Nf3 Ba6 Qe7 Bf4+ Kd1 Bh6 Qxe6+ Kb7 Qb3+ Ka8
 22	20 seconds
 22	+7.39 	823.7M	0:13.50	Rd8 Qxd8 Qh5 Qxg5 hxg5 Kg8 Qxh7+ Kf7 Qg6+ Ke7 Qxg7+ Rf7 Qg8 Kd7 Qxf7+ Kc6 Nxe6 Bxe6 Qxe6+ Kb7 a3 Nc6 Kb1 Ne7 Qd7 Kb6 Qd3 c6 f4 Kc7 Ka1 Rg8
 21	10 seconds
 21	+6.49 	437.9M	0:07.00	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Nd4 Nxd4 Bxd4 Ne6 Bf7 Nxd4 Bc4 Qe3 c5 Nf3 Rfd8 Ng5 h6 e6 Rf8 Qe5 hxg5 hxg5+ Kg8 g6 Ra7 Rh7
 20	+6.24 	246.9M	0:03.94	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 c6 Nxf8 Bxf8 Qf3 Nxc2 Kxc2 Kg8 Kb1 b4 axb4 Rb8 Ka1 h6 Qxf5 hxg5 hxg5 Bxb4 Qh7+ Kf7
 19	+5.90 	130.7M	0:02.06	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Nxf8 b4 Qf3 bxa3 bxa3 Rb8 Nfe6 Kg8 Kd2 h6 Qxf5 g6 Qh3 Nxe5 Qc3 Bd6 Re1
 18	+5.55 	54.0M  	0:00.83	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Nxf8 b4 Qf3 g6 Nfe6 Rb8 axb4 Nxb4 Kb1 h6 h5 Bxg5 hxg6 Bxg6 Nxg5
 17	+5.14 	35.4M  	0:00.54	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Nxf8 b4 Qf3 Rb8 Nfe6 bxa3 bxa3 Na5 Qc3 Nb3+ cxb3 Bxa3+ Kd1 c5
 16	+4.66 	19.4M  	0:00.29	Rd8 Bd7 Rxe8 Bxe8 a3 Be7 Nfxe6 Nc6 Qxb5 Nd8 Qd5 c6 Qf3 Nxe6 Nxe6 Rg8 Nd4 Ra5 Nxc6 Bxc6 Qxc6 Rxe5 Qxa4 Re2 Qd7 Rd8 Qxf5
 15	+4.47 	15.8M  	0:00.23	Rd8 Bd7 Rxe8 Bxe8 a3 Nc6 Nfxe6 Be7 Qxb5 Nd8 Qd3 Nxe6 Nxe6 Rg8 h5 Bc6 f3 Rae8 Re1 Bh4
 14	+3.25 	7.10M  	0:00.10	Rd8 Nxa2+ Kb1 Nc1 Qd1 Qxd8 Qh5 h6 Qg6 hxg5 hxg5+ Kg8 Rh7 Rf7 Qh5 Kf8 Rh8+ Ke7 Rxd8 Kxd8 Qxf7 a3 bxa3 Bxa3 Qg8+ Ke7 Qxg7+ Kd8 Qg8+ Ke7 Qh7+ Kd8 Nxe6+ Bxe6 Qh8+ Kd7 Qxa8 b4
 13	+2.35 	4.64M  	0:00.06	Rd8 Nxa2+ Kb1 Nc1 Kxc1 Qxd8 Qh5 Be3+ fxe3 h6 Qf7 Rxf7 Nxf7+ Kg8 Nxd8 b4 Nc6 a3
 12	 -0.54 	3.02M  	0:00.04	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 Nh5 Qe7 Nf6 Rxf6 hxg5+ Kg8 exf6 Qf8 Rh7
 11	 -0.82 	2.87M  	0:00.04	Rd8 Qxd8 Qh5 h6 Qg6 hxg5 Nh5 Qd7 hxg5 Kg8 a3 Nxc2 Nf6+ Rxf6 gxf6 Ba6 Qh7+ Kf7 Qxg7+ Ke8
 10	 -2.18 	1.63M  	0:00.02	a3 Nd5 Nxd5 exd5 Rxd5 Be7 e6 b4 Nf7+ Kg8 axb4 Bxe6 Nh6+ gxh6
  9	 -2.25 	1.48M  	0:00.02	a3 Nd5 Rxd5 exd5 Nxd5 Ra7 e6 c6 Nf4 Bd6 Nh5
  8	 -2.14 	715383	0:00.01	Qf3 c6 h5 h6 a3 Nd5 Rxd5 exd5 Ng6+ Kg8 Qc3 Bxf2
  7	 -1.86 	290079	0:00.01	Qf3 c6 h5 h6 Ng6+ Kg8 Nxf8 Bxf8 a3 hxg5
  6	 -1.86 	231762	0:00.01	Qf3 c6 g4 Nd5 Nxh7 Kxh7
  5	 -1.86 	221716	0:00.01	Qf3 c6 g4 Nd5 Nxh7 Kxh7
  4	 -3.92 	83894  	0:00.00	Ng6+ Qxg6 a3 h6 axb4
  3	 -4.00 	74790  	0:00.00	Ng6+ Qxg6 a3
  2	 -4.14 	11963  	0:00.00	Ng6+ Qxg6
  1	NNUE evaluation using eval.bin enabled.
  1	 -4.14 	7389    	0:00.00	Ng6+ Qxg6 Qxb5
  0	#
Image

peter
Posts: 2123
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Test Position

Post by peter » Sat Aug 08, 2020 5:44 am

MOBMAT wrote:
Sat Aug 08, 2020 2:48 am
But I concur, there were many "top" engines that couldn't find it quickly (<30 seconds)
Guess that's not the point of Louis posting, neither of the discussion at fishcooking, where the position was given as an example lately too, (have a look at the link, Louis gave:

https://github.com/official-stockfish/S ... -670598949

And it wasn't the point, when the position was dicussed last time here (have a look at the link I already gave in my posting above):

viewtopic.php?p=761437#p761437

Point is, it was and is a special weakness of SF's with hard coded eval "only".
Now SF NNUE dev. get's it at once with NNUE eval only too, but it doesnt with NNUE treshold patch.

If I remember correctly, it was from 06.08. onwards, versions later on don't find the solution (for most engines not so hard to find, even if it's nr. 146 in HTC) as quickly as full NNUE- eval does.

This is dev. 070820 at 24 threads of 3x12GHz, 8G hash, tbs switched, Use NNUE checked, net nn-5570a3425229.nnue:

r1b1qr1k/2p3pp/4p3/1pb1PpN1/pn3N1P/8/PPP1QPP1/2KR3R w - - 0 1

Analysis by Stockfish 070820:

Code: Select all

1.c3 Na6 2.Qf3 Ra7 3.a3 h6 
  -+  (-2.71)   Depth: 7/8   00:00:04  33kN
1.c3 Na6 2.Qf3 Bd7 3.Rxd7 Qxd7 4.Ngxe6 
  -+  (-3.28)   Depth: 8/10   00:00:04  61kN
1.Kb1 h6 2.c3 Na6 3.Nf3 Bb7 4.a3 Kg8 5.Ka1 
  -+  (-3.82)   Depth: 9/12   00:00:04  205kN
1.a3 Nc6 2.Qxb5 Bxf2 3.Qe2 Bb6 4.Kb1 h6 5.Nf3 Kg8 6.h5 Bb7 
  -+  (-4.00)   Depth: 10/17   00:00:04  260kN
1.a3 Nc6 2.Qxb5 Bxf2 3.Qe2 Bg3 4.Qf3 Bxf4+ 5.Qxf4 Bb7 6.Nf3 Ne7 7.Qc4 Be4 8.Qxe6 Rb8 9.Qa2 
  -+  (-4.04)   Depth: 11/19   00:00:04  300kN
1.a3 Nc6 2.Qxb5 Bxf2 3.Qe2 Bg3 4.Qf3 Bxf4+ 5.Qxf4 Ne7 6.Kb1 Rb8 7.Qc4 Qb5 8.Qxb5 Rxb5 
  -+  (-4.17)   Depth: 12/23   00:00:04  498kN
1.a3 Nd5 2.Nxd5 exd5 3.e6 h6 4.Rxd5 Bd6 5.Rxd6 cxd6 
  -+  (-4.05)   Depth: 13/23   00:00:04  704kN
1.a3 Nd5 2.Nxd5 exd5 3.Kb1 c6 4.Qe1 h6 5.Nf3 Be6 6.Qe2 Qb8 7.Nd4 Bxd4 8.Rxd4 Qa7 
  -+  (-4.81)   Depth: 14/23   00:00:04  2724kN
1.c3 Nd5 2.Nxd5 exd5 3.f4 a3 4.b3 h6 5.Nf3 Be6 6.Qd3 Kh7 7.Nd4 Bxd4 8.cxd4 b4 
  -+  (-5.01)   Depth: 15/26   00:00:04  4673kN
1.c3 Nd5 2.Nxd5 exd5 3.f4 a3 4.b3 h6 5.Nf3 Be6 6.Nd4 b4 7.Nxe6 Qxe6 8.Qf3 c6 9.Kc2 bxc3 10.Qxc3 
  -+  (-4.85)   Depth: 16/26   00:00:04  4956kN
1.a3 Nd5 2.Qf3 c6 3.h5 Nxf4 4.Qxf4 h6 5.Nh3 b4 6.axb4 Be7 7.Qg3 c5 8.Nf4 cxb4 9.Kb1 a3 10.b3 Kg8 
  -+  (-4.75)   Depth: 17/32   00:00:04  7072kN
1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ngh3 b4 5.axb4 Nxb4 6.Ng6+ Kg8 7.c3 Nd5 8.c4 Nb6 9.Nhf4 Nxc4 10.Qc3 Na5 11.Nxf8 Nb3+ 12.Kb1 Bxf8 
  -+  (-4.71)   Depth: 18/34   00:00:05  10825kN
1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ng6+ Kg8 5.Nh3 b4 6.axb4 Nxb4 7.c3 Nd5 8.c4 a3 9.cxd5 axb2+ 10.Kc2 cxd5 11.Nxf8 Bxf8 12.Qb3 Qc6+ 13.Kxb2 Qc7 14.f4 Rb8 
  -+  (-4.96)   Depth: 19/34   00:00:05  13026kN
1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ngh3 Kg8 5.Nd3 Be7 6.Nhf4 Nxf4 7.Nxf4 Bg5 8.Rd6 Bxf4+ 9.Qxf4 Bb7 10.Qg3 c5 11.Rhd1 Bd5 12.R1xd5 exd5 13.Rxh6 b4 14.axb4 
  -+  (-4.94)   Depth: 20/35   00:00:05  16847kN
1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ngh3 b4 5.axb4 Bxb4 6.Ng6+ Kg8 7.c4 Nb6 8.Nxf8 Bxf8 9.Nf4 Rb8 10.Ng6 Nxc4 11.Nxf8 Qxf8 12.Qxc6 Nxb2 13.Rd2 a3 14.Qd6 Qxd6 15.exd6 Bd7 16.f3 a2 17.Kc2 Kf7 
  -+  (-5.06)   Depth: 21/36   00:00:06  25556kN
1.Qf3 c6 
  -+  (-5.29 --)   Depth: 22/39   00:00:08  47577kN
1.Qf3 
  -+  (-5.15 ++)   Depth: 22/40   00:00:08  50698kN
1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ngh3 Kg8 5.Nd3 Be7 6.Kb1 Rb8 7.Nhf4 b4 8.axb4 Bxb4 9.Ng6 Be7 10.Nxf8 Qxf8 11.Ka1 Ba6 12.Nf4 Nxf4 13.Qxf4 a3 
  -+  (-5.09)   Depth: 22/40   00:00:08  51023kN
1.Qf3 c6 
  -+  (-5.18 --)   Depth: 23/40   00:00:08  52932kN
1.Qf3 
  -+  (-5.09 ++)   Depth: 23/40   00:00:08  54039kN
1.Qf3 c6 
  -+  (-5.27 --)   Depth: 23/44   00:00:08  56890kN
1.Qf3 
  -+  (-5.11 ++)   Depth: 23/44   00:00:08  56978kN
1.Qf3 c6 2.a3 Nd5 3.h5 h6 4.Ngh3 b4 5.Nd3 Be7 6.Nxb4 Bxb4 7.axb4 a3 8.bxa3 c5 9.Nf4 cxb4 10.Ng6+ Kh7 11.Nxf8+ Qxf8 12.Rxd5 exd5 13.Qxd5 Ra6 14.Rd1 bxa3 15.Kb1 Qe7 16.Ka1 Be6 
  -+  (-5.03)   Depth: 23/44   00:00:08  57191kN
1.Qf3 c6 
  -+  (-5.12 --)   Depth: 24/42   00:00:09  60176kN
1.Kb1 
  -+  (-5.03 ++)   Depth: 24/42   00:00:09  63954kN
1.Kb1 a3 
  -+  (-5.22 --)   Depth: 24/42   00:00:09  65655kN
1.Kb1 a3 2.b3 h6 3.Qf3 Ra6 4.Ngh3 Nc6 5.Qc3 Bb4 6.Qe3 Ne7 7.c3 Ba5 8.Rd3 Bb7 9.f3 Kg8 10.Rhd1 Bb6 11.Qd2 Bd5 12.h5 Ra7 13.Nxd5 Nxd5 14.Rxd5 exd5 15.Qxd5+ Kh7 16.Nf4 c6 17.Qd2 Qxe5 18.Ng6 Qf6 19.Nxf8+ Qxf8 
  -+  (-5.14)   Depth: 24/44   00:00:10  70411kN
1.Kb1 a3 
  -+  (-5.23 --)   Depth: 25/39   00:00:10  80339kN
1.Kb1 a3 
  -+  (-5.32 --)   Depth: 25/40   00:00:11  89124kN
1.Kb1 a3 
  -+  (-5.46 --)   Depth: 25/43   00:00:13  111MN
1.Kb1 
  -+  (-5.34 ++)   Depth: 25/43   00:00:13  117MN
1.Kb1 a3 2.b3 c6 3.Qf3 Nd5 4.h5 h6 5.Ng6+ Kg8 6.Nxf8 Bxf8 7.Nh3 b4 8.Nf4 Nc3+ 9.Ka1 Nxd1 10.Rxd1 Ra7 11.Qe3 Rd7 12.Rc1 c5 13.c3 Rd8 14.Ng6 Bb7 15.cxb4 cxb4 16.f3 
  -+  (-5.52)   Depth: 25/43   00:00:14  123MN
1.Kb1 
  -+  (-5.43 ++)   Depth: 26/41   00:00:14  125MN
1.Kb1 
  -+  (-5.34 ++)   Depth: 26/41   00:00:14  126MN
1.Kb1 
  -+  (-5.21 ++)   Depth: 26/41   00:00:14  126MN
1.Kb1 
  -+  (-5.01 ++)   Depth: 26/41   00:00:15  134MN
1.Kb1 a3 2.b3 c6 3.Qd2 Nd5 4.Nxd5 cxd5 5.h5 h6 6.Nh3 Rf7 7.Nf4 Bb7 8.Rh3 Kh7 9.Rg3 d4 10.Rg6 Re7 11.Nd3 Bb6 12.Qb4 
  -+  (-5.53)   Depth: 26/41   00:00:16  152MN
1.c3 
  -+  (-5.44 ++)   Depth: 27/40   00:00:19  187MN
1.c3 Nd5 
  -+  (-5.62 --)   Depth: 27/40   00:00:20  197MN
1.a3 
  -+  (-5.48 ++)   Depth: 27/45   00:00:25  269MN
1.a3 Nd5 
  -+  (-5.75 --)   Depth: 27/45   00:00:26  276MN
1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Qd3 b4 5.axb4 a3 6.bxa3 Bxb4 7.Rh3 Rxa3 8.Qxa3 Bxa3+ 9.Rxa3 Bb7 10.Rd1 h6 11.Nf3 Be4 12.Rad3 c5 13.Kd2 c4 14.Rd4 Qb5 15.Ke2 Bxc2 16.Kf1 c3+ 17.Kg1 Bxd1 18.Rxd1 Kh7 19.Rd4 
  -+  (-5.70)   Depth: 27/45   00:00:28  296MN
1.a3 Nd5 
  -+  (-5.79 --)   Depth: 28/43   00:00:29  317MN
1.a3 Nd5 
  -+  (-5.88 --)   Depth: 28/47   00:00:31  343MN
1.a3 
  -+  (-5.79 ++)   Depth: 28/47   00:00:32  347MN
1.Kb1 
  -+  (-5.54 ++)   Depth: 28/49   00:00:32  359MN
1.Kb1 
  -+  (-5.27 ++)   Depth: 28/49   00:00:32  359MN
1.Kb1 a3 2.Qf3 c6 3.Qc3 Be7 4.Nfxe6 Bxe6 5.Nxe6 Qf7 6.Qb3 Rfc8 7.Rh3 axb2 8.Nf4 Qe8 9.h5 h6 10.Qe6 Rd8 11.Rdh1 Bc5 12.Qxe8+ Rxe8 13.a3 Nd5 14.Nxd5 cxd5 15.Rb3 Bxf2 16.Rxb5 Rxe5 17.Rd1 Re3 18.Rdxd5 Rexa3 19.Kxb2 
  -+  (-5.21)   Depth: 28/49   00:00:35  367MN
1.Kb1 a3 
  -+  (-5.30 --)   Depth: 29/52   00:00:35  379MN
1.Kb1 Nd5 
  -+  (-5.39 --)   Depth: 29/52   00:00:36  399MN
1.Kb1 Nd5 
  -+  (-5.52 --)   Depth: 29/52   00:00:38  417MN
1.Kb1 Nd5 
  -+  (-5.72 --)   Depth: 29/52   00:00:42  468MN
1.Kb1 Nd5 
  -+  (-5.98 --)   Depth: 29/52   00:00:58  662MN
1.Kb1 
  -+  (-5.77 ++)   Depth: 29/52   00:00:59  676MN
1.Kb1 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Nf3 a3 5.b3 b4 6.Rdd1 Qc6 7.Qd3 Bb7 8.Qc4 Qxc4 9.bxc4 Bc5 10.Nd4 Rfe8 11.f3 Rxe5 12.Nb3 Be7 13.Rd7 Rc8 14.h5 Ba6 15.h6 Bxc4 16.hxg7+ Kg8 17.Nc1 Kxg7 
  -+  (-5.71)   Depth: 29/52   00:01:08  782MN
1.Kb1 Nd5 
  -+  (-5.80 --)   Depth: 30/48   00:01:12  817MN
1.c3 
  -+  (-5.71 ++)   Depth: 30/48   00:01:14  845MN
1.c3 Nd5 
  -+  (-5.89 --)   Depth: 30/48   00:01:14  852MN
1.a3 
  -+  (-5.73 ++)   Depth: 30/53   00:01:21  902MN
1.a3 Nd5 
  -+  (-6.08 --)   Depth: 30/53   00:01:22  945MN
1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Qd3 b4 5.axb4 a3 6.bxa3 Bxb4 7.Rh3 Rxa3 8.Qxa3 Bxa3+ 9.Rxa3 Bb7 10.Rda5 Bxg2 11.Re3 h6 12.Nf3 Qc6 13.Ne1 Be4 14.Raa3 Qc4 15.Nd3 f4 16.Re2 Rd8 17.e6 Kh7 18.e7 Re8 19.Kd2 Rxe7 20.Rc3 Qf7 21.Rc5 f3 22.Re3 
  -+  (-5.91)   Depth: 30/53   00:01:23  962MN
1.a3 Nd5 
  -+  (-6.00 --)   Depth: 31/51   00:01:25  984MN
1.Kb1 
  -+  (-5.91 ++)   Depth: 31/51   00:01:30  1052MN
1.a3 
  -+  (-5.78 ++)   Depth: 31/51   00:01:33  1086MN
1.a3 Nd5 
  -+  (-6.10 --)   Depth: 31/51   00:01:35  1117MN
1.a3 
  -+  (-5.84 ++)   Depth: 31/59   00:01:39  1148MN
1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Qd3 b4 5.axb4 a3 6.bxa3 Bxb4 7.Rh3 Rxa3 8.Qxa3 Bxa3+ 9.Rxa3 Bb7 10.Rda5 Bxg2 11.e6 Kg8 12.Rg3 Qc6 13.e7 Re8 14.Raa3 Bd5 15.Rgd3 Qc4 16.Nf3 Qf4+ 17.Kd1 Qd6 18.Nd2 Qxe7 19.Re3 Be6 20.Nf3 Qb4 21.Rad3 
  -+  (-5.82)   Depth: 31/59   00:01:40  1159MN
1.a3 Nd5 
  -+  (-5.91 --)   Depth: 32/54   00:01:41  1170MN
1.a3 Nd5 
  -+  (-6.00 --)   Depth: 32/59   00:01:45  1238MN
1.a3 Nd5 
  -+  (-6.14 --)   Depth: 32/59   00:01:52  1326MN
1.a3 
  -+  (-6.02 ++)   Depth: 32/59   00:01:54  1350MN
1.a3 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.Qd3 b4 5.axb4 a3 6.bxa3 Bxb4 7.Rh3 Bxa3+ 8.Qxa3 Rxa3 9.Rxa3 Bb7 10.Rdd3 Bxg2 11.f4 Qb5 12.Ne6 Rc8 13.Rab3 Qc4 14.Nd4 c5 15.Ne2 Be4 16.Kd2 Bxd3 17.Rxd3 Qe4 18.Re3 Qh1 19.h5 Qxh5 20.Ke1 Re8 21.Ra3 c4 22.Kf2 
  -+  (-6.07)   Depth: 32/59   00:01:55  1364MN
1.a3 
  -+  (-5.98 ++)   Depth: 33/54   00:01:55  1375MN
1.a3 Nd5 
  -+  (-6.16 --)   Depth: 33/54   00:02:01  1441MN
1.Kb1 
  -+  (-6.02 ++)   Depth: 33/57   00:02:11  1576MN
1.Kb1 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.e6 a3 5.Re1 axb2 6.Re5 Kg8 7.Qxb5 Qxb5 8.Rxb5 Ba6 9.Rxb2 Rfe8 10.Nf3 Bc4 11.Nd2 Bd5 12.c4 Bc6 13.f3 Bf6 14.Nb3 Kf8 15.e7+ Kf7 16.Rbe2 Bxh4 17.Rh1 Bf6 18.Rc2 Rxe7 19.Rxh7 Re1+ 20.Rc1 Re2 21.Rc2 Rxc2 22.Kxc2 Rxa2+ 23.Kd3 Rxg2 
  -+  (-6.17)   Depth: 33/57   00:02:12  1582MN
1.Kb1 Nd5 
  -+  (-6.26 --)   Depth: 34/52   00:02:28  1786MN
1.Kb1 
  -+  (-6.17 ++)   Depth: 34/57   00:02:29  1790MN
1.Kb1 
  -+  (-6.03 ++)   Depth: 34/57   00:02:34  1851MN
1.Kb1 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.e6 a3 5.Re5 axb2 6.Re1 Kg8 7.Qxb5 Qxb5 8.Rxb5 Ba6 9.Rxb2 Rfe8 10.Nf3 Bc4 11.Re5 Bf6 12.Rxf5 Bxe6 13.Rxf6 gxf6 14.Rb5 Bxa2+ 15.Kb2 Re2 16.Rc5 Rxf2 17.Kc3 h6 18.Rxc7 Rxg2 19.Nd4 Ra4 20.Rc5 Rg3+ 21.Kb2 Rxd4 22.Kxa2 Rxh4 23.Rc8+ Kf7 24.Kb2 
  -+  (-6.32)   Depth: 34/58   00:02:41  1944MN
1.Kb1 
  -+  (-6.23 ++)   Depth: 35/54   00:02:42  1959MN
1.Kb1 
  -+  (-6.13 ++)   Depth: 35/54   00:02:43  1964MN
1.Kb1 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.e6 a3 5.Re1 axb2 6.Re5 Kg8 7.Qxb5 Qxb5 8.Rxb5 Ba6 9.Rxb2 Rfe8 10.Nf3 Bf6 11.Re3 Bxb2 12.Kxb2 Bc8 13.Nd4 Ra4 14.Kc3 Ra3+ 15.Kb4 Rxe3 16.fxe3 Bxe6 17.a4 Kf7 18.a5 Ra8 19.Nxe6 Kxe6 20.Kb5 Kd5 21.a6 h6 22.c3 Ke4 23.h5 Kxe3 
  -+  (-6.25)   Depth: 35/58   00:02:46  2011MN
1.a3 
  -+  (-6.15 ++)   Depth: 36/58   00:03:06  2254MN
1.a3 
  -+  (-6.06 ++)   Depth: 36/60   00:03:09  2289MN
1.Kb1 
  -+  (-5.93 ++)   Depth: 36/60   00:03:19  2407MN
1.Kb1 Nd5 
  -+  (-6.34 --)   Depth: 36/60   00:03:30  2541MN
1.Kb1 
  -+  (-6.03 ++)   Depth: 36/62   00:03:40  2664MN
1.Kb1 Nd5 2.Nxd5 exd5 3.Rxd5 Be7 4.e6 a3 5.b3 h6 6.Nf3 Qc6 7.Rhd1 Rf6 8.Rd8+ Kh7 9.Ng5+ hxg5 10.hxg5 Rh6 11.Qd3 Qxe6 12.gxh6 Qf6 13.c3 Bxd8 14.Qxd8 Qxc3 15.Qd2 Qxd2 16.Rxd2 Kxh6 17.Rd5 Bb7 18.Rxb5 Bxg2 19.Kc1 Kg6 20.b4 Be4 21.Rc5 Ra4 22.Rc3 Rxb4 23.Rg3+ Kf6 24.Rxa3 f4 25.Kd2 Rb2+ 26.Ke1 f3 27.Ra7 c5 28.a4 
  -+  (-6.44)   Depth: 36/63   00:04:02  2937MN
Peter.

jp
Posts: 1388
Joined: Mon Apr 23, 2018 5:54 am

Re: Test Position

Post by jp » Sat Aug 08, 2020 11:55 am

MikeB wrote:
Sat Aug 08, 2020 4:19 am
and sadly, as you noted - cur-dev SF now struggles

40 -4.23 7.79G 1:47.41 Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Re3 Bc4 Rb7 Bd6 g3 h6 Nf3 Bxa2+ Kc1 f4 gxf4 Bxf4 Ne5 Bxe6 Nd3 Bxe3+ fxe3 Rec8 h5 c5 Nf4 Bf7 Kd2 c4 Ng6 Rc5 Nf4 c3+ Ke2 Ra2 Rb6 Bxh5+ Nxh5 Rxh5 Kd3
If you show SF the first move, what does SF think? (e.g. does it like it immediately?)

zullil
Posts: 6442
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Test Position

Post by zullil » Sat Aug 08, 2020 2:28 pm

jp wrote:
Sat Aug 08, 2020 11:55 am
MikeB wrote:
Sat Aug 08, 2020 4:19 am
and sadly, as you noted - cur-dev SF now struggles

40 -4.23 7.79G 1:47.41 Kb1 Nd5 Nxd5 exd5 Rxd5 Be7 e6 a3 Re1 axb2 Re5 Kg8 Qxb5 Qxb5 Rxb5 Ba6 Rxb2 Rfe8 Re3 Bc4 Rb7 Bd6 g3 h6 Nf3 Bxa2+ Kc1 f4 gxf4 Bxf4 Ne5 Bxe6 Nd3 Bxe3+ fxe3 Rec8 h5 c5 Nf4 Bf7 Kd2 c4 Ng6 Rc5 Nf4 c3+ Ke2 Ra2 Rb6 Bxh5+ Nxh5 Rxh5 Kd3
If you show SF the first move, what does SF think? (e.g. does it like it immediately?)

Here's Stockfish-dev (classical evaluation) with default settings (so a deterministic search). Still takes a bit to first realize that Black is losing:

info depth 31 seldepth 37 multipv 1 score cp -8 upperbound nodes 13690128 nps 1787923 hashfull 1000 tbhits 0 time 7657 pv e8d8 e2h5

User avatar
JVMerlino
Posts: 1043
Joined: Wed Mar 08, 2006 9:15 pm
Location: San Francisco, California

Re: Test Position

Post by JVMerlino » Sat Aug 08, 2020 5:50 pm

Even The King from CM9000 (of course, with only one thread) can find it in less than a minute:

Code: Select all

Time	Depth	Score	Positions	Moves
0:00	1/3	-3.52	1297		1.Kb1 Kg8 2.c3
0:00	1/3	-3.49	1523		1.a3 Nc6 2.Qxb5 Bxf2
0:00	1/3	-3.45	2262		1.c3 Qc6 2.Kb1
0:00	1/4	-3.26	4564		1.c3 Nxa2+ 2.Kb1 h6 3.Kxa2 hxg5
					4.hxg5+ Kg8
0:00	1/5	-3.34	19434		1.c3 Nc6 2.Kb1 Kg8 3.Qxb5 Bxf2
0:00	1/6	-3.32	51635		1.c3 Nc6 2.Kb1 Kg8 3.Nf3 Rb8
0:00	1/7	-3.34	133150		1.c3 Nc6 2.h5 Kg8 3.h6 g6 4.Qxb5
					Bxf2
0:00	1/8	-3.22	332237		1.c3 Nc6 2.h5 Kg8 3.h6 g6 4.Nf3 b4
0:00	1/9	-3.22	990155		1.c3 Nc6 2.h5 Kg8 3.h6 g6 4.Kb1
					Bd7 5.Qxb5 Bxf2
0:02	1/10	-3.16	2722058		1.c3 Nc6 2.h5 Kg8 3.h6 g6 4.Kb1
					Bd7 5.Nf3 Qe7 6.Qd2
0:06	2/11	-3.24	7283072		1.c3 Nc6 2.h5 Kg8 3.Kb1 h6 4.Nf3
					Ba6 5.g3 b4 6.c4 Rd8 7.Rxd8 Nxd8
0:22	3/12	-3.17	25196775	1.c3 Nc6 2.h5 Kg8 3.Kb1 Rb8 4.h6
					g6 5.Nf3 Qe7 6.Nd3 Bb6
0:44	3/12	-1.12	50563220	1.Rd8 Qxd8 2.Qh5 h6 3.Qg6 hxg5
					4.Nxe6 Bxe6 5.hxg5+ Kg8 6.Qxe6+
					Rf7 7.g6 Qe7 8.gxf7+ Qxf7 9.Rh8+
					Kxh8 10.Qxf7 Bxf2 11.Qxf5 Nxa2+
					12.Kb1
1:18	4/13	0.64	94327788	1.Rd8 Nxa2+ 2.Kb1 Nc1 3.Kxc1 Qxd8
					4.Qh5 h6 5.Qg6 hxg5 6.hxg5+ Kg8
					7.Rh7 Rf7 8.Qh5 Kf8 9.Rh8+ Ke7
					10.Rxd8 Bxf2 11.Rd2 Bc5 12.Qh8
2:48	5/14	2.53	214644962	1.Rd8 Nxa2+ 2.Kb1 Nc1 3.Kxc1 Qxd8
					4.Qh5 h6 5.Qg6 hxg5 6.hxg5+ Kg8
					7.Rh7 Rf7 8.Qh5 Kf8 9.Rh8+ Ke7
					10.Rxd8 Kxd8 11.Qxf7 Ra6 12.Nd3
					Be7 13.Qxg7

Vinvin
Posts: 4752
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Test Position

Post by Vinvin » Sat Aug 08, 2020 7:56 pm

JVMerlino wrote:
Sat Aug 08, 2020 5:50 pm
Even The King from CM9000 (of course, with only one thread) can find it in less than a minute:
...
That makes me angry with the modern chess engines : they can be MUCH weaker on some tactical shots despite the fact their rating is 700 points higher :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil:

Post Reply