From:
http://talkchess.com/forum3/viewtopic.php?f=2&t=74893&start=40#p872068
I suppose it could be called a problem but it looks somewhat like it might have come from a game, say after a big attack by white with some 'remnant' advanced pawns still around or something.
[Event "R7 2700X | RTX 2060"]
[Site "talkchess.com"]
[Date "2020.11.11"]
[Round ""]
[White "various engines"]
[Black ""]
[Result "1-0"]
[BlackElo "2400"]
[Time "16:32:27"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "0"]
[WhiteType "human"]
[BlackType "human"]
{Lc0-.23.2_192x16-t60-J64-210 , depth 17/43, time 02:07 , 5,250kn,43knps, +1.57} 1.f6
( {Cfish-201024 - PV=8 , depth 54/63, time 12:01 , 16,215,930kn, 22,481knps, +28.44 >>>>>>} 1. f6 Kg8 2.Rd7 Re1+ 3.Kc2 {+- etc.} )
1... Bxh3 2.c7 Bf5 3.Rd8 c3 4.Kd1 {zugzwang} c2+ 5.Kc1 a5 6.a4 c4 7.Kd2 c1R 8.Kxc1 c3 9.Kd1 c2+ 10.Kc1 Bc8 11.Kxc2 Bf5+ 12.Kc3 Be6 13.Kd4 Bc8 14.Kc5 Bf5 15.Kb6 Bc8 {etc. +-}
1-0
http://talkchess.com/forum3/viewtopic.php?f=2&t=74893&start=40#p872068
I suppose it could be called a problem but it looks somewhat like it might have come from a game, say after a big attack by white with some 'remnant' advanced pawns still around or something.
[Event "R7 2700X | RTX 2060"]
[Site "talkchess.com"]
[Date "2020.11.11"]
[Round ""]
[White "various engines"]
[Black ""]
[Result "1-0"]
[BlackElo "2400"]
[Time "16:32:27"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "0"]
[WhiteType "human"]
[BlackType "human"]
{Lc0-.23.2_192x16-t60-J64-210 , depth 17/43, time 02:07 , 5,250kn,43knps, +1.57} 1.f6
( {Cfish-201024 - PV=8 , depth 54/63, time 12:01 , 16,215,930kn, 22,481knps, +28.44 >>>>>>} 1. f6 Kg8 2.Rd7 Re1+ 3.Kc2 {+- etc.} )
1... Bxh3 2.c7 Bf5 3.Rd8 c3 4.Kd1 {zugzwang} c2+ 5.Kc1 a5 6.a4 c4 7.Kd2 c1R 8.Kxc1 c3 9.Kd1 c2+ 10.Kc1 Bc8 11.Kxc2 Bf5+ 12.Kc3 Be6 13.Kd4 Bc8 14.Kc5 Bf5 15.Kb6 Bc8 {etc. +-}
1-0
Times (mm:ss) & depth to find 1.f6: (R7 2700X 14th | RTX 2060)
00:02 10/23 Lc0.24.1-SVt40-1541 repeatable: closed & restarted Arena to verify
02:06 14/31 Lc0 26.3 J92-330
02:07 17/43 Lc0-.23.2_192x16-t60-J64-210
02:15 15/35 Lc0-.23.2-net63618
04:52 18/43 Lc0.24.1-Ls14.3
07:15 70/30 Cfish-201024-Pure
12:01 54/63 Cfish-201024 PV=8
48:47 19/41 Lc0.24.1-SVlgt60-3010
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - 0 1
Analysis by ShashChess 15.1:
1.c7 f6 2.Bg2 Ke7 3.Bc6 Rg8 4.Rd5 Rg1+ 5.Kb2 Rg2+ 6.Kc3 Rxa2 7.Kxc4 Rc2+ 8.Kb3 Rc1 9.Rd8 Bxf5 10.Be4 Be6+ 11.Bd5 Bf5 12.c8R Bxc8 13.Rxc8 Kd6 14.Kb2 Rg1 15.Bb7 f5 16.Kc3 Ke5 17.Rxc5+ Kf4 18.Rc4+ Kg3 19.Bxa6
White has an edge: = (0.25) Depth: 1/1 00:00:01 1555N
The position is equal: = (0.06) Depth: 25/42 00:00:01 27536kN, tb=66349
1.Rd5 f6 2.Kd2 Re4 3.Rd8+ Re8 4.c7 Ke7 5.Kc3 Rxd8 6.cxd8Q+ Kxd8 7.Kxc4 Kc7 8.Kxc5 Bd7 9.Bg4 Bc8 10.a3 Bd7 11.Kd5 Bc8 12.Bh3 Bd7 13.Bg4
The position is equal: = (0.00) Depth: 26/42 00:00:01 42283kN, tb=105138
The position is equal: = (0.00) Depth: 32/20 00:00:01 101MN, tb=327991
1.c7 f6 2.Bf1 Ke7 3.Bxc4 Rh8 4.Rd5 Bb7 5.Rd2 Bc8
The position is equal: = (0.00) Depth: 33/26 00:00:01 104MN, tb=335737
The position is equal: = (0.00) Depth: 40/12 00:00:02 198MN, tb=745977
1.f6 Bxh3 2.c7 Kg8 3.Rd8 Rf8 4.Kc2 Bf5+ 5.Kc3 Bc8 6.Kxc4 Be6+ 7.Kc3 c4 8.Kd4 c3 9.Kxc3 Bh3 10.Kc4 Be6+ 11.Kb4 Bc8 12.a3 Be6 13.a4 Rxd8 14.cxd8Q+ Kh7 15.Kc3 Kg6 16.Qd3+ Bf5 17.Qxa6 Be6 18.a5 Bf5 19.Qb5 Bc8 20.Qe5 Be6 21.Qg3+ Kf5 22.Qd3+ Kf4 23.Qd4+ Kg5
White is clearly winning: +- (6.37 ++) Depth: 41/52 00:00:04 386MN, tb=1651638
White is clearly winning: +- (10.24) Depth: 41/52 00:00:10 1481MN, tb=4184301
(, 20.11.2020)
Thanks! Same thing here, ShashChess 15.1 5 seconds, latest Cfish over 11 1/2 minutes!
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - 0 1
R7 2700X, 8 GBh, Sy.6, 7-threads each engine simultaneously:ShashChess15.1-avx2:
1/1 00:00 199 100k +0.61 1.Rd5
... ... ...
29/33 00:05 15,179k 3,128k +2.88 1.f6 Bxh3 2.c7 Bf5 3.Rd8 a5 4.Kb2 a4 5.Kc3 Be6 6.a3 Bc8 7.Kxc4 Bf5 8.Kxc5 Bh3 9.Kc4 Bc8 10.Kb5 Bh3 11.Kc5 Bf5 12.Kb6 Bc8 13.Kc6
...eval. gets higher
Cfish-201115-avx2:
1/1 00:00 168 56k +0.54 1.Rd5
,,, ,,, ,,,
69/32 10:51 5,270,468k 8,097k -0.00 1.c7...
70/9+ 11:29 5,619,398k 8,164k +0.08 1.f6
70/13+ 11:34 5,665,783k 8,175k +0.16 1.f6
70/13+ 11:35 5,679,551k 8,178k +0.28 1.f6
70/13+ 11:36 5,689,612k 8,180k +0.46 1.f6
70/13+ 11:37 5,694,642k 8,181k +0.71 1.f6
70/13+ 11:38 5,707,279k 8,183k +1.03 1.f6
70/13+ 11:39 5,721,222k 8,187k +1.47 1.f6
70/23+ 11:42 5,746,079k 8,193k +2.03 1.f6
70/23+ 11:50 5,834,926k 8,224k +2.75 1.f6
70/23+ 12:01 5,952,802k 8,258k +3.68 1.f6
...eval. slowly gets higher
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - bm f6; ce 32706; dm 31; c0 "
study by Smyslov"; c3 "f6"; c5 "2010.02.23;"; pv f6 Bxh3 c7 Bf5 Rd8 c3 Kd1 a5 a4 c4 Kc1 c2 Kd2 c1=R Kxc1 c3 Kd1 c2+ Kc1 Be6 Kxc2 Bg4 Kd3 Bh3 Kd4 Be6 Kc5 Bf5 Kb5 Kg8 c8=Q Bxc8 Rxe8+ Kh7 Rxc8 Kg6 Rc6 Kh5 Kxa5 Kg4 Kb5 Kg5 a5 Kg4 a6 Kf4 Rc5 Kf3 a7 Ke3 a8=Q Kf4 Rc4+ Ke3 Qe4+ Kf2 Rc2+ Kg3 Rg2+ Kh3 Qg4+;
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