Timings for 3 runs with SF and SF-MF :jdart wrote:That is really interesting. I think though bm Rf2 is not a good test because engines can select that at shallow depth.
I am thinking about replacing that position with this one:
[d] rn2r1k1/p4pn1/1p2p3/qPppP1Q1/3P4/2P2N2/2P2PPP/1R3RK1 w - - bm Nh4; c0 "Oechslein-Oppermann, VWC9/pr 20 ICCF 2016";
This is tricky but not quite as tricky as the one you have been pounding on.
--Jon
Stockfish_170417_x64_modern_matefinder: 16 sec, 24 sec and 24 sec
Stockfish_170417_x64_modern: 3m23s, 1m33s, 7m30s
Code: Select all
Stockfish_170417_x64_modern_matefinder:
...
26/39 00:08 62 245k 7 747k 0,00 1.c4 Qa2 2.cxd5 Nd7 3.dxe6 Qxe6 4.c3 a5 5.bxa6 Rxa6 6.Rfe1 Ra3 7.Qc1 Ra2 8.Qg5 Ra3
27/39 00:10 82 766k 7 794k 0,00 1.c4 Qa2 2.cxd5 Nd7 3.dxe6 Qxe6 4.c3 a5 5.bxa6 Rxa6 6.Rfe1 Ra3 7.Qc1 Ra2 8.Qg5 Ra3
28/39+ 00:16 130 070k 7 893k +0,07 1.Nh4
28/39+ 00:18 142 624k 7 909k +0,14 1.Nh4
28/47+ 00:40 333 326k 8 267k +1,75 1.Nh4
28/66 00:50 417 798k 8 341k +1,42 1.Nh4 Nd7 2.Rbd1 Qxb5 3.Rd3 Nf8 4.Rg3 Ng6 5.Nxg6 fxg6 6.Qxg6 Re7 7.Rh3 Rae8 8.f4 Rf7 9.g4 cxd4 10.Qh6 Kf8 11.f5 exf5 12.gxf5 Qxf1+ 13.Kxf1 Rxf5+ 14.Ke2 Rfxe5+ 15.Kd2 dxc3+ 16.Rxc3 R8e7 17.Kc1 R7e6 18.Qh7 Re7
29/66+ 00:54 455 953k 8 354k +1,49 1.Nh4
29/66+ 00:56 473 992k 8 332k +1,56 1.Nh4
29/66+ 01:25 714 455k 8 318k +2,32 1.Nh4
Stockfish_170417_x64_modern_matefinder:
...
23/40 00:04 36 829k 8 269k 0,00 1.c4 Nd7 2.cxd5 Qa2 3.dxe6 Qxe6 4.c3 f6 5.exf6 Nxf6 6.Qh4 Nf5 7.Qg5+ Ng7
24/40 00:05 42 469k 8 271k 0,00 1.c4 Nd7 2.cxd5 Qa2 3.dxe6 Qxe6 4.c3 f6 5.exf6 Nxf6 6.Qh4 Nf5 7.Qg5+ Ng7
25/40+ 00:08 70 731k 8 241k +0,07 1.Qf4
25/40+ 00:09 79 514k 8 177k +0,14 1.Qf4
25/40+ 00:10 88 894k 8 108k +0,25 1.Qf4
25/40- 00:11 93 667k 8 110k +0,16 1.Qf4 Qxc3
25/43 00:12 97 553k 8 099k 0,00 1.Qf4 Qxc3 2.Ng5 Nf5 3.Qg4 Ng7 4.Rb3 Qxc2 5.Rh3 Qg6 6.Qh4 Qh5 7.Qxh5 Nxh5 8.Rxh5 Nd7 9.dxc5 bxc5 10.f4 Rab8 11.Ra1 Rb7 12.Nh7 Rxb5 13.Rxa7 Rb1+ 14.Kf2 Rb2+ 15.Kf3 Rd8 16.Rxd7 Rb3+ 17.Kf2 Rb2+ 18.Kf3
26/46 00:15 121 943k 8 047k 0,00 1.Qf4 Qxc3 2.Ng5 Nf5 3.Qg4 Ng7 4.Rb3 Qxc2 5.Rh3 Qg6 6.Qh4 Qh5 7.Qxh5 Nxh5 8.Rxh5 Nd7 9.dxc5 bxc5 10.f4 Rab8 11.Ra1 Rb7 12.Nh7 Rxb5 13.Rxa7 Rb1+ 14.Kf2 Rb2+ 15.Kf3 Re7 16.Rxd7 Rb3+ 17.Kf2 Rb2+ 18.Kf3
27/46 00:18 151 069k 8 023k 0,00 1.Qf4 Qxc3 2.Ng5 Nf5 3.Qg4 Ng7 4.Rb3 Qxc2 5.Rh3 Qg6 6.Qh4 Qh5 7.Qxh5 Nxh5 8.Rxh5 Nd7 9.dxc5 bxc5 10.f4 Rab8 11.Ra1 Rxb5 12.Rxa7 Rb1+ 13.Kf2 Re7 14.Nh7 Rb2+ 15.Kg1 Rb1+ 16.Kf2
28/47+ 00:24 199 762k 8 005k +0,07 1.Nh4
28/47+ 00:26 211 266k 8 001k +0,14 1.Nh4
28/51+ 00:56 457 007k 8 151k +2,37 1.Nh4
28/63 00:58 474 793k 8 172k +2,36 1.Nh4 c4 2.f4 Qxc3 3.Rf3 Qxd4+ 4.Kh1 Qe4 5.Rg3 Qh7 6.f5 exf5 7.Nxf5 Nd7 8.Qf4 Re6 9.Rxg7+ Qxg7 10.Nxg7 Kxg7 11.Rd1 Nxe5 12.Rxd5 f6 13.Rd4 Rae8 14.Qg3+ Kf7 15.Qh3 Rg8 16.Qh5+ Kg7 17.Qf5 Kf7 18.Qh7+ Rg7 19.Qh5+ Ke7 20.Qh4 Kf7 21.Rd8 Re7 22.Qh5+ Ke6
29/63- 00:58 479 250k 8 175k +2,29 1.Nh4 c4
29/63- 00:58 479 807k 8 175k +2,22 1.Nh4 c4
29/63- 00:58 480 249k 8 176k +2,11 1.Nh4 c4
29/63 01:01 506 927k 8 182k +2,08 1.Nh4 c4 2.f4 Qxc3 3.Rf3 Qxd4+ 4.Kh1 Qe4 5.Rg3 Qh7 6.f5 exf5 7.Nxf5 Nd7 8.Qf4 Re6 9.Rxg7+ Qxg7 10.Nxg7 Kxg7 11.Rd1 Nxe5 12.Rxd5 f6 13.Rd4 Ree8 14.Rd1 Rad8 15.Rf1 Re6 16.Qg3+ Kf7 17.Qh3 Rd2 18.Qh7+ Ke8 19.Qg8+ Ke7 20.c3 Nf7 21.Qg7 Rde2 22.Kg1 Re1
Stockfish_170417_x64_modern_matefinder:
...
26/46 00:09 79 191k 8 095k 0,00 1.c4 Nd7 2.cxd5 Qa2 3.dxe6 Qxe6 4.c3 cxd4 5.cxd4 f6 6.exf6 Nxf6 7.Qh4 Nf5 8.Qg5+ Ng7
27/46+ 00:11 90 583k 8 085k +0,07 1.c4
27/46- 00:15 121 854k 8 019k 0,00 1.c4 Qa2
27/46 00:18 147 439k 8 041k 0,00 1.Qf4 Qxc3 2.Ng5 Nf5 3.Qg4 Ng7 4.Rb3 Qxc2 5.Rh3 Qg6 6.Qh4 Qh5 7.Qxh5 Nxh5 8.Rxh5 cxd4 9.f4 Nd7 10.Nxf7 Kxf7 11.Rh7+ Kg6 12.Rxd7 Kf5 13.Rf7+ Ke4 14.Re1+ Kd3 15.f5 exf5 16.e6 Kc4 17.Rc7+ Kxb5 18.Rb1+ Ka5 19.Ra1+ Kb5 20.Rb1+
28/46+ 00:24 195 819k 8 029k +0,07 1.Nh4
28/46+ 00:26 212 365k 8 043k +0,14 1.Nh4
28/46+ 00:41 336 402k 8 068k +1,75 1.Nh4
28/46 00:52 424 468k 8 138k +1,95 1.Nh4 a6 2.Rbd1 c4 3.f4 Qxc3 4.f5 Qxc2 5.Ra1 Ra7 6.f6 Qh7 7.Ra3 Rc8 8.Rg3 Kf8 9.Ng6+ Qxg6 10.Qh4 Kg8 11.Rxg6 fxg6 12.fxg7 Rxg7 13.Rf3 Re8 14.Rh3 Kf7 15.Qf4+ Kg8 16.Qh6 Kf7 17.bxa6
29/46+ 01:00 489 266k 8 119k +2,02 1.Nh4
29/46+ 01:02 510 143k 8 131k +2,10 1.Nh4
29/46+ 01:07 549 732k 8 092k +2,36 1.Nh4
29/47- 01:13 594 584k 8 095k +2,23 1.Nh4 c4
29/47+ 01:15 611 085k 8 092k +2,40 1.Nh4
29/55+ 01:26 700 444k 8 098k +2,77 1.Nh4
29/60 01:31 744 200k 8 110k +2,95 1.Nh4 c4 2.f4 Qxc3 3.f5 Qxd4+ 4.Kh1 Qxe5 5.Rbe1 f6 6.Qg4 Nd7 7.Rxe5 Nxe5 8.Qg3 Rad8 9.fxe6 Rxe6 10.Nf5 Rd7 11.Nd4 Re8 12.Kg1 Kf7 13.Nc6 Ng6 14.Qg4 Rd6 15.Nxa7 f5 16.Nc6 Re4 17.Qg3 Ree6 18.h4 d4 19.h5 Nxh5 20.Rxf5+ Nf6 21.Qh3 Re1+ 22.Kf2
30/60+ 01:44 856 184k 8 165k +3,03 1.Nh4
-----------------------------------------------------------------------------------------------
Code: Select all
Stockfish_170417_x64_modern:
...
31/67- 00:47 415 170k 8 674k +0,47 1.Qf4 Qxc3
31/67+ 00:48 417 315k 8 675k +0,69 1.Qf4
31/67+ 00:59 514 103k 8 590k +1,17 1.Qf4
31/67 01:02 535 116k 8 571k +1,08 1.Qf4 Nd7 2.Ng5 Nf5 3.Qf3 Nf8 4.g4 Nh6 5.Ra1 Qxb5 6.Qf6 Ng6 7.Nxf7 Nxf7 8.Qxg6+ Kf8 9.Rae1 Ke7 10.Qf6+ Kd7 11.Qxf7+ Re7 12.Qg6 Qc4 13.Qd3 Qxd3 14.cxd3 cxd4 15.cxd4 a5 16.Rb1 Ra6 17.f3 a4 18.h4 a3 19.Kf2 a2 20.Ra1 Ra3 21.Ke3 Rh7 22.h5 Ra4 23.Kd2
32/67+ 01:10 607 551k 8 561k +1,16 1.Qf4
32/67- 01:14 639 772k 8 573k +1,08 1.Qf4 Nd7
32/67 01:18 668 664k 8 571k +1,04 1.Qf4 Nd7 2.Ng5 Nf5 3.Qf3 Nf8 4.g4 Nh6 5.Ra1 Qxb5 6.Qf6 Qe2 7.Qxh6 Qxc2 8.f4 Qg6 9.Qxg6+ Nxg6 10.f5 Nf8 11.Ra6 Re7 12.Rfa1 b5 13.Kf2 cxd4 14.cxd4 Rb7 15.fxe6 fxe6 16.Nxe6 Nxe6 17.Rxe6 b4 18.h4 b3 19.Ke3 b2 20.Rb1 a5 21.Rg6+ Kf7 22.h5 a4 23.e6+ Kf8
33/67+ 01:22 703 329k 8 573k +1,12 1.Qf4
33/67- 01:25 737 107k 8 578k +1,04 1.Qf4 Nd7
33/67+ 01:27 753 726k 8 584k +1,12 1.Qf4
33/67+ 01:51 969 946k 8 669k +1,48 1.Qf4
33/67- 02:19 1 202 871k 8 622k +1,31 1.Qf4 Nd7
33/67 02:29 1 294 974k 8 653k +1,53 1.Qf4 Nd7 2.Ng5 Re7 3.Nh7 Kxh7 4.Qh4+ Kg8 5.Qxe7 Nf8 6.Qb7 Rd8 7.dxc5 bxc5 8.Ra1 Qxc3 9.Rxa7 Rd7 10.Qa8 Rxa7 11.Qxa7 Nf5 12.b6 Qxc2 13.Qc7 Nh4 14.Kh1 Qa4 15.Qxc5 Nd7 16.Qc8+ Kg7 17.b7 d4 18.Rg1 Ng6 19.Qxd7 Qxd7 20.b8Q Qd5 21.Qd6 Qxe5 22.Qxe5+ Nxe5 23.Rd1 Nc6 24.Kg1 Kg6 25.h4 Kf5 26.g3 Ke4
34/67- 02:33 1 329 265k 8 660k +1,46 1.Qf4 Nd7
34/67- 02:33 1 329 865k 8 660k +1,39 1.Qf4 Nd7
34/67- 02:49 1 474 353k 8 687k +0,91 1.Qf4 Nd7
34/67+ 03:04 1 602 116k 8 703k +1,08 1.Qf4
34/67+ 03:23 1 774 852k 8 729k +1,45 1.Nh4
34/68+ 04:39 2 473 522k 8 845k +2,56 1.Nh4
34/68 05:37 3 007 632k 8 908k +3,04 1.Nh4 Nd7 2.Rbd1 c4 3.f4 Qxc3 4.f5 f6 5.exf6 Nxf6 6.Qxf6 Qe3+ 7.Kh1 Rf8 8.Qg6 Qe4 9.Qg5 exf5 10.Ng6 Rfe8 11.Qh6 Qe6 12.h4 Qf6 13.Rf3 Re4 14.Qh8+ Kf7 15.Qxa8 Kxg6 16.Qxd5 Rxh4+ 17.Kg1 Ne6 18.Rg3+ Kh6 19.Rh3 Rxh3 20.gxh3 Ng5 21.Rf1 Ne6 22.Qxc4 Qxd4+ 23.Qxd4 Nxd4 24.c4 Ne2+ 25.Kf2 Nd4 26.Ke3
Stockfish_170417_x64_modern:
...
29/38 00:08 70 330k 8 476k 0,00 1.c4 Qa2 2.cxd5 Nd7 3.dxe6 Qxe6 4.c3 f6 5.exf6 Nxf6 6.Qh4 Nf5 7.Qg5+ Ng7
30/38 00:14 118 287k 8 399k 0,00 1.c4 Qa2 2.cxd5 Nd7 3.dxe6 Qxe6 4.c3 f6 5.exf6 Nxf6 6.Qh4 Nf5 7.Qg5+ Ng7
31/38+ 00:24 210 878k 8 464k +0,07 1.Qf4
31/38+ 00:29 248 418k 8 495k +0,14 1.Qf4
31/43+ 00:37 319 836k 8 550k +0,61 1.Qf4
31/59 00:51 441 344k 8 651k +0,54 1.Qf4 Qxc3 2.Ng5 Rf8 3.Rb3 Qxc2 4.Rh3 Qg6 5.Qh4 Qh5 6.Qxh5 Nxh5 7.Rxh5 Nd7 8.dxc5 Nxc5 9.f4 a6 10.bxa6 Rxa6 11.f5 Re8 12.fxe6 fxe6 13.Rh6 Ra7 14.Rb1 Rb7 15.h4 b5 16.Rg6+ Rg7 17.Rxg7+ Kxg7 18.Rxb5 Nd3 19.Rb6 Nxe5 20.Nxe6+ Kf7 21.Nf4
32/59+ 00:55 478 319k 8 684k +0,62 1.Qf4
32/59+ 01:00 525 265k 8 695k +0,69 1.Qf4
32/59- 01:01 533 468k 8 697k +0,62 1.Qf4 Qxc3
32/59+ 01:06 583 443k 8 714k +0,70 1.Qf4
32/59+ 01:33 817 288k 8 757k +0,91 1.Nh4
32/59+ 03:07 1 653 894k 8 837k +2,68 1.Nh4
32/59 03:36 1 918 300k 8 861k +3,10 1.Nh4 Nd7 2.Rbd1 c4 3.f4 Qxc3 4.f5 f6 5.exf6 Nxf6 6.Qxf6 Qe3+ 7.Kh1 Rf8 8.Qg6 Qe4 9.f6 Qxg6 10.Nxg6 Nf5 11.Nxf8 Kxf8 12.Rf3 Kf7 13.g4 Nd6 14.Kg2 Rh8 15.Rb1 Rg8 16.h3 Nf5 17.Ra3 Kxf6 18.Rf1 Ke7 19.Rd1 Kf6 20.Kf3 Rh8 21.Rxa7 Rxh3+ 22.Kf4
33/67+ 04:04 2 179 418k 8 905k +3,18 1.Nh4
33/67+ 04:13 2 262 025k 8 915k +3,25 1.Nh4
33/67+ 04:50 2 604 003k 8 957k +3,72 1.Nh4
33/67 05:02 2 715 398k 8 966k +3,73 1.Nh4 Nd7 2.Rbd1 c4 3.f4 Qxc3 4.f5 f6 5.exf6 Nxf6 6.Qxf6 Qe3+ 7.Kh1 Rf8 8.Qg6 Qe4 9.f6 Qxg6 10.Nxg6 Nf5 11.Nxf8 Rxf8 12.Rf3 Nd6 13.g4 Nxb5 14.h4 Nd6 15.Kg2 b5 16.g5 Rb8 17.Kg3 Nf5+ 18.Kg4 b4 19.h5 b3 20.cxb3 cxb3 21.g6 a5 22.Kg5 b2 23.Rb1 Nxd4 24.Ra3 Nf5 25.Rxa5
FEN: rn2r1k1/p4pn1/1p2p3/qPppP1Q1/3P4/2P2N2/2P2PPP/1R3RK1 w - - 0 1
Stockfish_170417_x64_modern:
...
33/64 01:36 857 646k 8 887k +0,87 1.Qf4 Qxc3 2.Ng5 Nf5 3.Qg4 Ng7 4.Rb3 Qxc2 5.Rh3 Qg6 6.Qh4 Qh5 7.Qf4 Qg6 8.Nxf7 Nh5 9.Qh6 Qxh6 10.Nxh6+ Kh7 11.Rxh5 Kg6 12.Ng4 Kxh5 13.Nf6+ Kg6 14.Nxe8 Nd7 15.Nc7 Rc8 16.Nxe6 Kf5 17.Ng7+ Kg6 18.Ra1 cxd4 19.Ne6 d3 20.Nf4+ Kf5 21.Nxd3 Nxe5 22.Nxe5 Kxe5 23.h4 Rc7 24.Kf1 Rh7 25.g3 Kd4 26.Ke2 Kc4 27.Ke3 d4+ 28.Kd2 Rf7 29.f4 Rg7 30.h5 Rxg3 31.Rxa7
34/64+ 01:42 913 358k 8 897k +0,94 1.Qf4
34/64+ 01:49 977 168k 8 908k +1,01 1.Qf4
34/64+ 02:08 1 144 227k 8 930k +1,27 1.Qf4
34/64- 02:22 1 267 470k 8 921k +1,15 1.Qf4 Nd7
34/64 02:27 1 313 324k 8 921k +1,16 1.Qf4 Nd7 2.Ng5 Nf5 3.Qf3 Nf8 4.Ra1 Qxb5 5.g4 Nh6 6.Qf6 Qe2 7.Qxh6 Qxc2 8.f4 Qg6 9.Qxg6+ Nxg6 10.f5 Nf8 11.Ra6 cxd4 12.cxd4 Re7 13.Kf2 Rc8 14.Rfa1 Rcc7 15.h4 b5 16.Rb1 Rc2+ 17.Kg3 Rc3+ 18.Kf4 Rc4 19.Nf3 b4 20.h5 Rb7 21.Rb3 Nd7 22.Ke3 exf5 23.gxf5 Rbc7 24.Ra5 Kg7 25.Rxd5 Rc3+ 26.Rxc3 Rxc3+ 27.Ke4
35/64- 02:31 1 346 556k 8 916k +1,08 1.Qf4 Nd7
35/64+ 02:56 1 568 385k 8 910k +1,16 1.Qf4
35/64+ 03:26 1 855 831k 8 999k +1,63 1.Qf4
35/65- 03:39 1 991 282k 9 062k +1,46 1.Qf4 Nd7
35/67+ 03:48 2 077 743k 9 102k +1,68 1.Qf4
35/67 04:06 2 256 564k 9 170k +1,72 1.Qf4 Qxc3 2.Ng5 Nf5 3.Qg4 Ng7 4.Rb3 Qxc2 5.Rh3 Qg6 6.Qh4 Qh5 7.Qf4 Qg6 8.Nxf7 Nh5 9.Qh6 Qxh6 10.Nxh6+ Kg7 11.Rxh5 Rh8 12.Rg5+ Kxh6 13.f4 Rf8 14.g4 cxd4 15.Rf3 Rxf4 16.Rh5+ Kg7 17.Rxf4 Nd7 18.h4 d3 19.Kf2 Rc8 20.Ra4 Rc7 21.Ke3 Nc5 22.Rg5+ Kh6 23.Rd4 Kh7 24.Rb4 Rb7 25.Rh5+ Kg6 26.Rb2 Rf7 27.Rg5+ Kh6
36/67+ 04:28 2 488 306k 9 281k +1,80 1.Qf4
36/67- 04:36 2 570 934k 9 295k +1,72 1.Qf4 Nd7
36/67+ 04:41 2 615 683k 9 308k +1,80 1.Qf4
36/67- 04:46 2 672 349k 9 313k +1,70 1.Qf4 Nd7
36/67+ 04:51 2 713 298k 9 312k +1,83 1.Qf4
36/67- 04:55 2 749 113k 9 316k +1,66 1.Qf4 Nd7
36/67 05:13 2 915 790k 9 290k +1,40 1.Qf4 Nd7 2.Ng5 Re7 3.Nh7 Kxh7 4.Qh4+ Kg8 5.Qxe7 Nf8 6.Qb7 Rd8 7.dxc5 bxc5 8.Ra1 Qxc3 9.Rxa7 Rd7 10.Qb8 Rxa7 11.Qxa7 Qc4 12.b6 Nf5 13.b7 Nh4 14.Qa3 Nd7 15.g3 Ng6 16.Qb2 Kg7 17.f4 Qe2 18.b8Q Qe3+ 19.Rf2 Nxb8 20.Qxb8 Qe1+ 21.Kg2 Qe4+ 22.Kf1 Qh1+ 23.Ke2 Qe4+ 24.Kd1 Ne7 25.Qb5 Qd4+ 26.Ke1 Qa1+ 27.Ke2 c4 28.Qc5 Nf5 29.Kf3 Qc3+ 30.Kg4 Ne3+ 31.Kg5 Qe1 32.Rf3 Nxc2
37/67+ 05:23 3 000 240k 9 280k +1,47 1.Qf4
37/67+ 05:28 3 049 918k 9 290k +1,54 1.Qf4
37/67+ 05:35 3 120 042k 9 300k +1,65 1.Qf4
37/67- 05:39 3 157 689k 9 308k +1,56 1.Qf4 Nd7
37/67- 06:17 3 498 723k 9 269k +1,07 1.Qf4 Nd7
37/67+ 07:30 4 183 224k 9 292k +1,29 1.Nh4
37/67+ 09:00 5 000 867k 9 258k +2,40 1.Nh4
37/67 10:06 5 635 737k 9 293k +2,81 1.Nh4 Nd7 2.Rbd1 c4 3.f4 Qxc3 4.f5 f6 5.exf6 Nxf6 6.Qxf6 Qe3+ 7.Kh1 Rf8 8.Qg6 Qe4 9.f6 Qxg6 10.Nxg6 Nf5 11.Nxf8 Rxf8 12.Rf3 Nd6 13.Rg3+ Kh7 14.Rg7+ Kh8 15.Rxa7 Rxf6 16.g3 Rf2 17.Re7 Nxb5 18.Rxe6 Rxc2 19.Rxb6 Rb2 20.Rb7 Nc3 21.Rxb2 Nxd1 22.Rd2 Nc3 23.Kg2 Ne4 24.Rc2
38/67+ 10:29 5 864 921k 9 310k +2,88 1.Nh4
38/67+ 10:55 6 110 332k 9 321k +2,95 1.Nh4
38/67+ 11:53 6 669 638k 9 347k +3,21 1.Nh4