start your engines...

MikeB · Post by **MikeB** » Sun Feb 03, 2019 5:46 am

[d]q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1 ; best move Nf4

from a 2017 ICCF game, found on the HIARCS ICCF forum ...

Jouni · Post by **Jouni** » Sun Feb 03, 2019 12:28 pm

Hard one except for Houdini

Analysis by Houdini 6 x64-pext Tac:

1...Nf4
-/+ (-0.89 ++) Depth: 19/45 00:00:04 32404kN, tb=2
1...Nf4
-/+ (-1.25 ++) Depth: 19/45 00:00:04 34274kN, tb=2
1...Nf4
-+ (-1.72 ++) Depth: 19/52 00:00:05 41393kN, tb=8
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.d5 exd5 6.Ne3 Bc5 7.b4 Bxe3 8.fxe3 Qg4+ 9.Kg2 Qe2+ 10.Kg1 Qxb2 11.a3 h4 12.gxh4 Qe2 13.Re1 Qg4+ 14.Kh1 Qxh4 15.Rac1 Qe4+
-+ (-1.74) Depth: 19/52 00:00:05 42716kN, tb=9
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.d5 exd5 6.Ne3 Bc5 7.b4 Bxe3 8.fxe3 Qg4+ 9.Kg2 Qe2+ 10.Kg1 Qxb2 11.a3 h4 12.gxh4 Qe2 13.Re1 Qg4+ 14.Kh1 Qxh4 15.Rac1 Qe4+
-+ (-1.74) Depth: 19/52 00:00:05 42725kN, tb=9
1...Nf4
-+ (-1.81 ++) Depth: 20/52 00:00:05 44647kN, tb=9
1...Nf4
-+ (-1.88 ++) Depth: 20/52 00:00:06 46691kN, tb=9
1...Nf4
-+ (-1.98 ++) Depth: 20/52 00:00:06 50723kN, tb=12
1...Nf4
-+ (-2.13 ++) Depth: 20/52 00:00:06 53699kN, tb=12
1...Nf4 2.Bxb7
-+ (-2.01 --) Depth: 20/52 00:00:07 56205kN, tb=12
1...Nf4 2.Bxb7
-+ (-1.74 --) Depth: 20/52 00:00:07 58359kN, tb=12
1...Nf4
-+ (-1.95 ++) Depth: 20/52 00:00:07 60342kN, tb=12
1...Nf4
-+ (-2.42 ++) Depth: 20/52 00:00:08 64440kN, tb=13
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Ne3 Qxf2 6.Rc8 g5 7.Bc3 g4+ 8.Nxg4 hxg4+ 9.Kxg4 Qf5+ 10.Kh4 Qh7+ 11.Kg4 f5+ 12.Kf4 Qb7 13.Rxf8+ Kxf8 14.Ke3 Qg2 15.Kd3 Kf7 16.Bd2 Qf3+
-+ (-2.23) Depth: 20/52 00:00:08 68052kN, tb=15
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Ne3 Qxf2 6.Rc8 g5 7.Bc3 g4+ 8.Nxg4 hxg4+ 9.Kxg4 Qf5+ 10.Kh4 Qh7+ 11.Kg4 f5+ 12.Kf4 Qb7 13.Rxf8+ Kxf8 14.Ke3 Qg2 15.Kd3 Kf7 16.Bd2 Qf3+
-+ (-2.23) Depth: 20/52 00:00:08 68063kN, tb=15
1...Nf4
-+ (-2.30 ++) Depth: 21/52 00:00:09 71399kN, tb=15
1...Nf4
-+ (-2.37 ++) Depth: 21/52 00:00:09 72917kN, tb=15
1...Nf4
-+ (-2.48 ++) Depth: 21/52 00:00:09 75343kN, tb=15
1...Nf4
-+ (-2.63 ++) Depth: 21/52 00:00:10 79006kN, tb=21
1...Nf4 2.Bxb7
-+ (-2.51 --) Depth: 21/52 00:00:10 79893kN, tb=22
1...Nf4
-+ (-2.67 ++) Depth: 21/52 00:00:10 86575kN, tb=40
1...Nf4 2.Bxb7
-+ (-2.45 --) Depth: 21/52 00:00:11 87972kN, tb=40
1...Nf4
-+ (-2.74 ++) Depth: 21/61 00:00:11 91997kN, tb=41
1...Nf4 2.Bxb7
-+ (-2.36 --) Depth: 21/61 00:00:12 96952kN, tb=41
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Rh1 g5 6.Rae1 Be7 7.Bc1 Kg7 8.Rhg1 Qxf2 9.Ne3 Kg6 10.Ref1 g4+ 11.Nxg4 hxg4+ 12.Kxg4 Qxh2 13.Kf3 Qxa2 14.Rh1 Bd6 15.Be3 Qxb3 16.Rc1 Qd5+ 17.Kf2 Qf5+
-+ (-2.25) Depth: 21/61 00:00:12 98790kN, tb=42
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Rh1 g5 6.Rae1 Be7 7.Bc1 Kg7 8.Rhg1 Qxf2 9.Ne3 Kg6 10.Ref1 g4+ 11.Nxg4 hxg4+ 12.Kxg4 Qxh2 13.Kf3 Qxa2 14.Rh1 Bd6 15.Be3 Qxb3 16.Rc1 Qd5+ 17.Kf2 Qf5+
-+ (-2.25) Depth: 21/61 00:00:12 98863kN, tb=42
1...Nf4
-+ (-2.32 ++) Depth: 22/61 00:00:13 109mN, tb=105
1...Nf4
-+ (-2.39 ++) Depth: 22/61 00:00:13 111mN, tb=105
1...Nf4
-+ (-2.49 ++) Depth: 22/61 00:00:14 114mN, tb=105
1...Nf4
-+ (-2.64 ++) Depth: 22/61 00:00:14 118mN, tb=105
1...Nf4
-+ (-2.85 ++) Depth: 22/61 00:00:15 125mN, tb=105
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Rg1 b5 6.Nd2 Qxf2 7.Raf1 Qxd2 8.Rg2 Qg5 9.Rgf2 Qd5 10.Bc1 Be7 11.Rc2 Qxd4 12.Rf4 Qd7 13.Rff2 e5+ 14.Kg2 Qd5+ 15.Kh3 Qe4
-+ (-2.88) Depth: 22/61 00:00:16 136mN, tb=111
1...Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Rg1 b5 6.Nd2 Qxf2 7.Raf1 Qxd2 8.Rg2 Qg5 9.Rgf2 Qd5 10.Bc1 Be7 11.Rc2 Qxd4 12.Rf4 Qd7 13.Rff2 e5+ 14.Kg2 Qd5+ 15.Kh3 Qe4
-+ (-2.88) Depth: 22/61 00:00:17 141mN, tb=113

Joerg Oster · Post by **Joerg Oster** » Sun Feb 03, 2019 12:30 pm

MikeB wrote: ↑Sun Feb 03, 2019 5:46 am [d]q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1 ; best move Nf4

from a 2017 ICCF game, found on the HIARCS ICCF forum ...

It takes Zander more than 7 minutes to find Nf4,
3 Threads, 1 GB Hash, 6-syzygy:

info depth 36 seldepth 64 multipv 1 score cp 121 nodes 1727920009 nps 4303039 hashfull 1000 tbhits 5675 time 401558 pv d5b4 f3e2 a8d8 c4e3 h5h4 e2c4 d8d7 a2a4 b7e4 b2c3 b4d5 e3f1 h4g3 h2g3 d5c3 c1c3 d7d4 c4e6 g8h7 c3e3 d4a1 e3e4 g7g6 g1g2 f6f5 e4e2 a1f6 f1d2 g6g5 d2f3 h7g7 e6d5 g5g4 f3h4 f5f4 e2e4 f8d6 e4e6 f4f3 g2f1 f6b2 h4f5 g7f8 f5d6 b2b1 e6e1 b1d3 f1g1 d3d5
info depth 37 currmove d5b4 currmovenumber 1
info depth 37 currmove h5h4 currmovenumber 2
info depth 37 currmove d5f4 currmovenumber 3
info depth 37 seldepth 56 multipv 1 score cp 128 lowerbound nodes 1853678104 nps 4312925 hashfull 1000 tbhits 6217 time 429796 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 b2a3 f8a3 c1f1 g7g5 c4e3 a3b2 a1d1 g8f7 b3b4 f7g6 b4b5 g5g4 h3h4 f3e4 a2a4 b2d4 d1e1
info depth 37 currmove d5f4 currmovenumber 1
info depth 37 seldepth 67 multipv 1 score cp 136 lowerbound nodes 1886571473 nps 4317363 hashfull 1000 tbhits 6768 time 436973 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 b2a3 f8a3 c1f1 g7g5 c4e3 a3b2 a1d1 g8f7 e3c4
info depth 37 currmove d5f4 currmovenumber 1
info depth 37 seldepth 67 multipv 1 score cp 147 lowerbound nodes 1924953902 nps 4320622 hashfull 1000 tbhits 7678 time 445527 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 b2a3 f8a3 c1f1 g7g5 c4e3 a3b2 a1d1 g8f7 b3b4 f7g6 a2a4
info depth 37 currmove d5f4 currmovenumber 1
info depth 37 seldepth 67 multipv 1 score cp 163 lowerbound nodes 1940606574 nps 4322246 hashfull 1000 tbhits 7782 time 448981 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 b2a3 f8a3 c1f1 g7g5 c4e3 a3b2 a1d1 g8f7 b3b4 f7g6 d1d3
info depth 37 currmove d5f4 currmovenumber 1
info depth 37 seldepth 67 multipv 1 score cp 184 lowerbound nodes 2003787493 nps 4326507 hashfull 1000 tbhits 8856 time 463142 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 b2a3 f8a3 c1f1 g7g5 c4e3 a3b2 a1d1 g8f7 b3b4 f7g6 b4b5 g5g4 h3h4 f3e4 a2a4 b2d4 d1b1
info depth 37 currmove d5f4 currmovenumber 1
info depth 37 seldepth 67 multipv 1 score cp 212 lowerbound nodes 2065833787 nps 4328139 hashfull 1000 tbhits 11441 time 477303 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 b2a3 f8a3 c1f1 g7g5 c4e3 a3b2 a1d1 g8f7 b3b4 f7g6 b4b5 g5g4 h3h4 f3e4 h2h3
info depth 37 currmove d5f4 currmovenumber 1
info depth 37 seldepth 67 multipv 1 score cp 250 lowerbound nodes 2197221833 nps 4342799 hashfull 1000 tbhits 15380 time 505946 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 b2a3 f8a3 c1f1 g7g5 c4e3 a3b2 a1d1 g8f7 b3b4 f7g6 b4b5 g5g4 h3h4 f3e4 h2h3
info depth 37 currmove d5f4 currmovenumber 1
info depth 37 currmove d5b4 currmovenumber 2
info depth 37 currmove a8d8 currmovenumber 3
info depth 37 currmove f8b4 currmovenumber 4
info depth 37 currmove f8c5 currmovenumber 5
info depth 37 currmove g8h8 currmovenumber 6
info depth 37 currmove g7g6 currmovenumber 7
info depth 37 currmove f6f5 currmovenumber 8
info depth 37 currmove a7a5 currmovenumber 9
info depth 37 currmove a8b8 currmovenumber 10
info depth 37 currmove d5e3 currmovenumber 11
info depth 37 currmove b7c6 currmovenumber 12
info depth 37 currmove f8d6 currmovenumber 13
info depth 37 currmove b6b5 currmovenumber 14
info depth 37 currmove g7g5 currmovenumber 15
info depth 37 currmove f8e7 currmovenumber 16
info depth 37 currmove g8h7 currmovenumber 17
info depth 37 currmove b7a6 currmovenumber 18
info depth 37 currmove h5h4 currmovenumber 19
info depth 37 currmove a8e8 currmovenumber 20
info depth 37 currmove d5c3 currmovenumber 21
info depth 37 currmove g8f7 currmovenumber 22
info depth 37 currmove d5c7 currmovenumber 23
info depth 37 currmove d5e7 currmovenumber 24
info depth 37 currmove a7a6 currmovenumber 25
info depth 37 currmove a8c8 currmovenumber 26
info depth 37 currmove e6e5 currmovenumber 27
info depth 37 currmove f8a3 currmovenumber 28
info depth 37 currmove b7c8 currmovenumber 29
info depth 37 seldepth 70 multipv 1 score cp 293 nodes 2532113881 nps 4372264 hashfull 1000 tbhits 32590 time 579131 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 c1h1 b6b5 c4d2 f3f2 b2c3 b5b4 h1f1 f2e2 a1e1 e2g4 h3g2 b4c3 d2f3 g4f5 f1f2 f5d5 e1e3 g7g5 g2f1 g5g4 f3e1 d5d4 e3d3 d4c5 f2c2 c5f5 c2f2 f5b5 f2c2 e6e5 a2a4 b5b3 d3c3 b3a4 c3c8 a4e4 e1g2 g8f7 c2c7 f8e7 g2h4 e4h1 f1f2 h1h2 h4g2 h5h4 g3h4
...
info depth 40 seldepth 68 multipv 1 score cp 362 nodes 5091760379 nps 4456897 hashfull 1000 tbhits 161013 time 1142445 pv d5f4 f3b7 f4h3 g1f1 a8b7 f1e2 b7g2 c1f1 g2h2 b2c1 h5h4 g3h4 b6b5 c4b2 h3g1 f1g1 h2g1 b2d3 g1g4 f2f3 g4d4 a1b1 d4g1 b1b2 g1h2 e2e3 h2h4 b2c2 e6e5 e3e2
bestmove d5f4 ponder f3b7

Paloma · Post by **Paloma** » Sun Feb 03, 2019 8:55 pm

Hi Mike,
can you post the whole game, i didn't find it in CorrDatabase.

Daniel · Post by **Daniel** » Sun Feb 03, 2019 8:58 pm

Great position to analyze.

MikeB · Post by **MikeB** » Sun Feb 03, 2019 9:17 pm

Paloma wrote: ↑Sun Feb 03, 2019 8:55 pm Hi Mike,
can you post the whole game, i didn't find it in CorrDatabase.

[pgn][Event "S-Open/7-pr/90"] [Site "ICCF"] [Date "2017.01.31"] [White "Fremmegaard, Jens Tore"] [Black "Macurek, Miloslav"] [Result "0-1"] [BlackElo "2185"] [ECO "D30"] [WhiteElo "1990"] 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Bd3 Nbd7 6.O-O Bd6 7.Nbd2 O-O 8.Re1 c5 9.Qc2 h6 10.b3 cxd4 11.exd4 b6 12.cxd5 Nxd5 13.Qc6 N7f6 14.Qxa8 Qc7 15.Bb2 Bd7 16.Qxf8+ Bxf8 17.Ne5 Bc8 18.Rec1 Qd8 19.Nc6 Qd6 20.Ne4 Nxe4 21.Bxe4 Bb7 22.Ne5 Qd8 23.Nc6 Qe8 24.Ne5 Qa8 25.g3 h5 26.Bf3 f6 27.Nc4 Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rg1 b5 32.Ba3 bxc4 33.Bxf8 Kxf8 34.bxc4 g5 35.Rab1 Kf7 36.a4 Qxf2 37.Rh1 g4+ 38.Kh4 Qd2 39.Rb5 Qg2 40.Rb7+ Kg6 41.h3 Qxh1 42.Rg7+ Kxg7 43.Kxh5 Qxh3# 0-1[/pgn]

cur-dev-McCain tactical 3 , with tactical setting = 0 ( standard setting), it searched over 20 minutes without finding the solution

Code: Select all

dep   score   nodes   time   (not shown:  tbhits   knps   seldep) 
 32    -3.12    8.94G   6:21.30   Nf4 Bxb7 Nh3+ Kg2 Qxb7+ f3 g5 Nd2 g4 Rc2 Bb4 Bc3 gxf3+ Nxf3 Ng5 Rf1 Qe4 Bxb4 Qxc2+ Rf2 Qe4 h4 Nxf3 Rxf3 f5 Be7 Qxd4 Rf2 Qe4+ Kh2 e5 Bg5 Kf7 Rg2 Ke6 Rf2 Qd3 Bh6 
 31    -2.97    7.55G   5:21.84   Nf4 Bxb7 Nh3+ Kg2 Qxb7+ f3 g5 Rc3 g4 Rac1 Bb4 Re3 Qd5 Bc3 Bf8 Rf1 Bh6 Rd3 Ng5 Bd2 gxf3+ Rdxf3 Nxf3 Rxf3 Bxd2 Nxd2 Kf7 Kf2 Qxd4+ Ke2 e5 Re3 Qb2 Rd3 
 30    -2.17    6.52G   4:38.97   Nf4 Bxb7 Nh3+ Kg2 Qxb7+ Kxh3 Qf3 Ne3 Qxf2 Rc8 Qxb2 Nc2 Kf7 Rc7+ Kg6 Rc8 e5 Rxf8 Qxc2 dxe5 Qf5+ Kg2 Qe4+ Kh3 Qxe5 Rf1 Qe2 Rf4 Qxa2 Ra4 Qxb3 Rxa7 Qd5 Re8 b5 Re1 b4 Raa1 
 30    -1.16    5.31G   3:48.06   h4 Bg4 Qe8 Re1 Nc7 Rac1 Qc6 f3 Qd7 Kf2 b5 Ne3 Bd6 Rg1 f5 Bh5 f4 gxf4 Bxf4 Rg4 Bh6 Rg6 Bxe3+ Kxe3 Nd5+ Kd2 Nf4 Rg5 Nxh5 Rxh5 Qf7 Re5 Bd5 Kc3 a5 Kc2 Qg6+ Kd2 Qg2+ Re2 Qxf3 Rc8+ Kh7 
 29    -1.17    3.68G   2:37.96   h4 a3 Ne7 Bg4 f5 Be2 hxg3 hxg3 f4 Rc3 fxg3 Rxg3 Nf5 Rh3 Bg2 Rh2 Bf3 Bd3 Qd8 Re1 Qg5+ Kf1 Qf4 Rh3 Qg4 Rh2 Nh4 Re3 Bg2+ Ke1 Qf4 Rxh4 Qxh4 Rxe6 Qh1+ Kd2 Qg1 Kc2 Bf1 Nd2 Bxd3+ Kxd3 Qxf2 
 28    -1.08    2.81G   2:00.80   h4 Bg4 Qe8 Re1 Nc7 Rac1 Qc6 f3 Qd7 Rf1 g5 Rf2 Qh7 gxh4 f5 Bh3 Qxh4 Ne5 Bd6 Bg2 Nd5 f4 Nxf4 Rxf4 Qxf4 Bxb7 Qd2 Rc8+ Kh7 Bc3 Qxa2 Kf1 Qc2 Kg1 Qxb3 Bf3 Qb1+ Kg2 
 27    -1.10    1.95G   1:23.73   h4 a3 Ne7 Bg4 f5 Be2 hxg3 hxg3 f4 Rc3 fxg3 Rxg3 Nf5 Rh3 Bg2 Rh2 Bf3 Bd3 Qd8 Re1 Qg5+ Kf1 Qf4 Rh3 Qg4 Rh2 Nh4 Re3 Bg2+ Ke1 Qf4 Rxh4 Qxh4 Rxe6 Qh1+ Kd2 Qg1 f3 Bxf3 Kc2 Bd5 Re8 Qf2+ Nd2 Qh2 Bc3 Bf7 Re2 
 26    -0.98    1.45G   1:02.28   h4 a3 Ne7 Bg4 f5 Be2 hxg3 hxg3 f4 Rc3 fxg3 Rxg3 Nf5 Rh3 Bg2 Rh2 Bf3 Bd3 Qd8 Re1 Qg5+ Kf1 Qf4 Rh3 Qg4 Rh2 Nh4 Re3 Bg2+ Ke1 Qf4 Rxh4 Qxh4 Rxe6 Bd5 Re5 Qh1+ Kd2 
 25    -1.09    951.0M   0:40.87   h4 a3 Ne7 Bg4 f5 Be2 hxg3 hxg3 f4 Rc3 fxg3 Rxg3 Nf5 Rh3 Bg2 Rh2 Bf3 Bd3 Qd8 Re1 Qg5+ Kf1 Nh4 Re3 Bg2+ Ke1 Qf4 Rxh4 Qxh4 Rxe6 Bd5 Re5 Qh2 Kd2 Qxf2+ Kc3 Bf7 Re2 Qh4 Kc2 b5 
 24    -1.04    705.1M   0:30.24   h4 Bg4 Qe8 Rf1 b5 Rae1 Nf4 gxf4 Qg6 h3 Bf3 Kh2 Bxg4 hxg4 bxc4 bxc4 Qxg4 Bc1 Bd6 c5 Bxf4+ Bxf4 Qxf4+ Kh3 Qf3+ Kh2 Kf7 
 23    -1.01    435.3M   0:18.68   h4 Bg4 Qe8 Re1 Nc7 Rac1 Qc6 f3 Qd7 Kf2 b5 Ne3 f5 Bh5 Bd6 Rg1 Qd8 f4 Nd5 Nxd5 Bxd5 Rc3 g5 Bf3 Bxf3 Kxf3 Kf7 Ke2 hxg3 hxg3 Qh8 fxg5 Qxd4 
 22    -0.82    260.9M   0:11.20   h4 Bg4 Qe8 Rf1 b5 Rae1 Nf4 gxf4 Qg6 h3 Bf3 Kh2 Bxg4 hxg4 bxc4 bxc4 Qxg4 Bc1 Bd6 Re4 e5 dxe5 fxe5 fxe5 Qxe4 exd6 
 21    -0.73    180.2M   0:07.73   h4 a3 Ne7 Bg4 f5 Bh3 g5 Re1 Qd8 Ne3 Bg7 gxh4 gxh4 Bg2 Bxg2 Nxg2 Qd5 Nxh4 Qxb3 Rab1 Nd5 
 20    -0.68    120.3M   0:05.14   h4 Bg4 Qe8 Be2 Qd7 Nd2 Nb4 a3 Nc6 Bf3 Ne7 b4 Nf5 Rc2 Nxd4 Bxd4 Qxd4 Rac1 Bd5 Bg2 hxg3 hxg3 Qd3 Nc4 Kf7 Bxd5 exd5 Ne3 
 19    -0.70    72.5M     0:03.08   h4 Bg4 Qe8 Re1 Nc7 Rac1 Qc6 f3 Qd7 Kf2 b5 Ne3 f5 Bh5 Bd6 f4 g5 Bf3 Bxf3 Kxf3 gxf4 gxf4 Qe8 Rg1+ Kf8 d5 exd5 Kf2 
 18    -0.61    56.3M     0:02.38   h4 Bg4 Qe8 Be2 hxg3 hxg3 Qf7 Rd1 g5 Bg4 Nc7 d5 f5 Ne5 Qh7 Bf3 Bxd5 Bxd5 Nxd5 
 17    -0.46    32.6M     0:01.38   h4 Bg4 Qe8 Re1 Nc7 Rec1 hxg3 hxg3 Qd7 Ne3 Nd5 Nc4 Ne7 Ne3 Nf5 Nxf5 exf5 Be2 Bd6 a3 
 16    -0.39    24.5M     0:01.03   Nb4 Be2 Qd8 Ne3 h4 Bf1 Qd7 a3 Nd5 Nc4 g6 Bg2 hxg3 hxg3 Qb5 b4 Bh6 f4 Qd7 Kf2 
 15    -0.35    17.0M     0:00.72   h4 Bg4 Kf7 a3 Be7 Bh5+ g6 Bg4 Qd8 Bf3 b5 Ne3 h3 a4 b4 a5 
 14    -0.31    9.79M     0:00.41   h4 a4 Nb4 Bg4 Bd5 Be2 Qb7 Ne3 Bf3 Bb5 h3 Rc3 Nd5 Nxd5 
 13    -0.30    6.93M     0:00.30   h4 a3 Nc7 Bg4 Qd8 Nd2 hxg3 hxg3 Kf7 Bf3 Bxf3 Nxf3 Nd5 
 12    -0.38    3.55M     0:00.15   Nb4 Be2 Qe8 Nd2 Nd5 Bf3 Qf7 Nc4 Nb4 Bxb7 Qxb7 
 11    -0.25    2.09M     0:00.09   Nb4 Be2 Qd8 Ne3 g6 Bc4 Qd6 a4 a5 Be2 Qd8 Bb5 Bh6 
 10    -0.44    1.41M     0:00.06   Nb4 Be2 Bh1 Bf1 Nd3 Rc3 Nxb2 Nxb2 
  9    -0.29    551944   0:00.02   h4 a4 Nb4 Be2 Qd8 Ne3 hxg3 fxg3 Nd5 Bf3 Qd7 
  8    -0.29    270274   0:00.01   h4 Ba3 Bxa3 Nxa3 Ne7 Rc7 Bxf3 Rxe7 hxg3 
  7    -0.38    174352   0:00.01   Nb4 Be2 Qd8 Ne3 g6 Re1 Bh6 
  6    -0.58    100615   0:00.01   Nb4 Be2 Qe8 Ne3 
  5    -0.36    49789     0:00.00   Nb4 Be2 Be4 Ne3 Nd3 
  4    -0.82    32941     0:00.00   Nb4 Bxb7 Qxb7 a4 Nd3 
  3    -0.46    18516     0:00.00   Ne7 Bxb7 Qxb7 
  2    -0.30    9533       0:00.00   b5 Nd2 Qe8 
  1    -0.96    3887       0:00.00   b5

Paloma · Post by **Paloma** » Sun Feb 03, 2019 9:31 pm

Thanks Mike!

zullil · Post by **zullil** » Mon Feb 04, 2019 12:21 am

MikeB wrote: ↑Sun Feb 03, 2019 5:46 am [d]q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1 ; best move Nf4

from a 2017 ICCF game, found on the HIARCS ICCF forum ...

Cfish-dev, in what was likely a lucky run:

info depth 30 seldepth 55 multipv 1 score cp 170 lowerbound nodes 1613276092 nps 30207768 hashfull 326 tbhits 0 time 53406 pv d5f4
info depth 27 currmove d5f4 currmovenumber 1
info depth 30 seldepth 55 multipv 1 score cp 206 lowerbound nodes 1641141200 nps 30203570 hashfull 329 tbhits 0 time 54336 pv d5f4
info depth 26 currmove d5f4 currmovenumber 1
info depth 30 seldepth 55 multipv 1 score cp 254 lowerbound nodes 1677403450 nps 30200087 hashfull 335 tbhits 0 time 55543 pv d5f4
info depth 25 currmove d5f4 currmovenumber 1
info depth 30 seldepth 55 multipv 1 score cp 317 lowerbound nodes 1885894903 nps 30219768 hashfull 388 tbhits 0 time 62406 pv d5f4
info depth 24 currmove d5f4 currmovenumber 1
info depth 24 currmove d5b4 currmovenumber 2
info depth 24 currmove g8f7 currmovenumber 3
info depth 24 currmove f8d6 currmovenumber 4
info depth 24 currmove a8d8 currmovenumber 5
info depth 24 currmove a8b8 currmovenumber 6
info depth 24 currmove f8b4 currmovenumber 7
info depth 24 currmove h5h4 currmovenumber 8
info depth 24 currmove g7g5 currmovenumber 9
info depth 24 currmove b6b5 currmovenumber 10
info depth 24 currmove f8e7 currmovenumber 11
info depth 24 currmove g8h7 currmovenumber 12
info depth 24 currmove a8c8 currmovenumber 13
info depth 24 currmove f8c5 currmovenumber 14
info depth 24 currmove f8a3 currmovenumber 15
info depth 24 currmove a8e8 currmovenumber 16
info depth 24 currmove d5c7 currmovenumber 17
info depth 24 currmove g7g6 currmovenumber 18
info depth 24 currmove d5e7 currmovenumber 19
info depth 24 currmove g8h8 currmovenumber 20
info depth 24 currmove f6f5 currmovenumber 21
info depth 24 currmove d5c3 currmovenumber 22
info depth 24 currmove b7a6 currmovenumber 23
info depth 24 currmove b7c8 currmovenumber 24
info depth 24 currmove a7a5 currmovenumber 25
info depth 24 currmove d5e3 currmovenumber 26
info depth 24 currmove b7c6 currmovenumber 27
info depth 24 currmove e6e5 currmovenumber 28
info depth 24 currmove a7a6 currmovenumber 29
info depth 30 seldepth 55 multipv 1 score cp 325 nodes 1954637481 nps 30243969 hashfull 403 tbhits 0 time 64629 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 c4e3 f3f2 c1c8 f2b2 e3c2 g8f7 c8c7 f7g6 a1f1 b2a2 f1f3 a2b1 c7c3 b1h1 f3f2 h1d5 b3b4 e6e5 d4e5 d5e6 h3g2 e6e5 c3f3 e5d5 h2h3

peter · Post by **peter** » Mon Feb 04, 2019 9:16 am

zullil wrote: ↑Mon Feb 04, 2019 12:21 am Cfish-dev, in what was likely a lucky run:
...
info depth 30 seldepth 55 multipv 1 score cp 325 nodes 1954637481 nps 30243969 hashfull 403 tbhits 0 time 64629 pv d5f4 f3b7 f4h3 g1g2 a8b7 g2h3 b7f3 c4e3 f3f2 c1c8 f2b2 e3c2 g8f7 c8c7 f7g6 a1f1 b2a2 f1f3 a2b1 c7c3 b1h1 f3f2 h1d5 b3b4 e6e5 d4e5 d5e6 h3g2 e6e5 c3f3 e5d5 h2h3

Sting does it well:

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Analysis by Sting 13 based on Stockfish 2.1.1 64bit:

Code: Select all

27...g6 
  =  (0.04 ++)   Depth: 7   00:00:04  12kN
...
27...Nb4 28.Be2 h4 29.Ne3 Bf3 30.Bf1 hxg3 31.hxg3 Qe8 32.Bc3 Nd5 33.Nxd5 Bxd5 34.Bb2 Qh5 35.Bg2 Bxg2 36.Kxg2 Qe2 37.Rab1 Bb4 38.Kg1 Bd6 39.Re1 Qc2 
  =/+  (-0.48)   Depth: 27   00:00:30  349MN
27...Nf4 
  =/+  (-0.56 ++)   Depth: 28   00:00:32  378MN
27...Nf4 
  =/+  (-0.64 ++)   Depth: 28   00:00:33  390MN
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rg1 b5 32.Rgf1 bxc4 33.bxc4 g5 34.Rab1 g4+ 35.Kh4 Qf5 36.f4 
  -/+  (-0.76 ++)   Depth: 28   00:00:34  408MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rg1 b5 32.Rgf1 bxc4 33.bxc4 g5 34.Rab1 g4+ 35.Kh4 Qf5 36.f4 gxf3 37.Bc1 Qxb1 38.Rxf3 Qxc1 39.Rxf6 Qxc4 40.Kxh5 Qxa2 41.Kg6 Qxh2 42.Rxe6 Qxg3+ 43.Kf6 Qg2 44.Ke5 Qe2+ 45.Kd5 Qf3+ 
  -+  (-1.63 ++)   Depth: 28   00:00:42  523MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kf1 Qxb7 30.Ke2 Qg2 31.Rf1 Qxh2 32.Ba3 Bxa3 33.Nxa3 h4 34.gxh4 Nf4+ 35.Ke3 Qxh4 36.Rac1 Nd5+ 37.Kd3 Qh3+ 38.f3 Qf5+ 39.Ke2 e5 40.Nb5 Nf4+ 41.Kf2 Nd3+ 42.Ke2 Nxc1+ 
  -+  (-2.66)   Depth: 29   00:01:15  1036MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.f3 g5 31.d5 g4 32.Ne3 exd5 33.fxg4 Ng5 34.Kh1 d4+ 35.Ng2 d3 36.Rc4 hxg4 37.Rf4 Ne4 38.Rxg4+ Kf7 39.Rf4 d2 40.Rd1 Qd5 41.Rf3 Qh5 42.Nh4 Nf2+ 43.Rxf2 Qxd1+ 
  -+  (-3.19)   Depth: 32   00:02:39  2346MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kf1 Qxb7 30.Ke2 Qg2 31.Rf1 Qxh2 32.Ba3 Bxa3 33.Nxa3 h4 34.d5 exd5 35.Kf3 hxg3 36.fxg3 Ng5+ 37.Kg4 Qe2+ 38.Kf5 Qb2 39.Kg6 Qxa3 40.Kf5 Ne4 41.Ke6 Nxg3 42.Kxd5 Nxf1 43.Rxf1 Qxa2 44.Kc6 Qxb3 45.Kb7 Kf7 46.Kxa7 Qd3 
  -+  (-3.39 ++)   Depth: 34   00:04:53  4551MN

Three trials, each time < 1 Minute with 24 threads of 3x12GHz CPU, 8G hash.

CorChess at a single try shortly less than 2 minutes.

Jouni · Post by **Jouni** » Tue Feb 05, 2019 9:03 am

Any idea what's the secret of tactical Houdini? It also gets 200/200 in Arasan suite eventually. Obviously not only nullmove change, but something else!?

start your engines...

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