AdminX wrote:Dann Corbit wrote:These look to be the hardest for Stockfish:
4kr2/5p1K/3p1Q2/1p4P1/4P3/1PP5/7b/8 w - -
[d]4kr2/5p1K/3p1Q2/1p4P1/4P3/1PP5/7b/8 w - -
This is by far the best result I had with a Rainbow Serpent:
[D]4kr2/5p1K/3p1Q2/1p4P1/4P3/1PP5/7b/8 w - -
Engine: Rainbow Serpent 20162803_035 MP (i7 3600, 4 threads, 512 MB)
Latest change: No movecount pruning in (no pieces for side to move) pawn endgames.
(Hack, but effect on bench is within two percent increase. Might help a little here)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
28/41 0:01 0.00 1.g6 Be5 2.Qxe5+ dxe5 3.g7 Ke7
4.gxf8B+ Kxf8 5.c4 bxc4 6.bxc4 f5
7.exf5 e4 8.c5 e3 9.c6 Ke7 10.Kg6 e2
11.f6+ Ke6 12.c7 Kd7 13.f7 e1Q
14.f8Q (12.312.596) 6619
29/41 0:02 0.00 1.g6 Be5 2.Qxe5+ dxe5 3.g7 Ke7
4.gxf8B+ Kxf8 5.c4 bxc4 6.bxc4 f5
7.exf5 e4 8.c5 e3 9.c6 Ke7 10.Kg6 e2
11.f6+ Ke6 12.c7 Kd7 13.f7 e1Q
14.f8Q (13.679.048) 6624
.
.
.
38/52 0:43 0.00 1.g6 Be5 2.Qxe5+ dxe5 3.g7 Ke7
4.gxf8B+ Kxf8 5.c4 bxc4 6.bxc4 f5
7.exf5 e4 8.c5 e3 9.c6 Ke7 10.c7 Kd7
11.f6 e2 12.f7 e1Q 13.c8Q+ Kxc8
14.f8Q+ (266.543.814) 6142
39/53 1:08 0.00 1.g6 Be5 2.Qxe5+ dxe5 3.g7 Ke7
4.gxf8B+ Kxf8 5.c4 bxc4 6.bxc4 f5
7.exf5 e4 8.c5 e3 9.c6 Ke7 10.c7 Kd7
11.f6 e2 12.f7 e1Q 13.c8Q+ Kxc8
14.f8Q+ (416.800.099) 6111
40/53 1:50 +0.03++ 1.Kh6 (643.835.736) 5817
40/53 1:52 +0.06++ 1.Kh6 (651.463.625) 5808
40/53 1:53 +0.12++ 1.Kh6 (657.291.454) 5806
40/53 1:55 +0.24++ 1.Kh6 (667.369.591) 5802
40/53 1:55 +0.49++ 1.Kh6 (671.474.902) 5800
40/53 2:02 +0.99++ 1.Kh6 (706.101.130) 5769
40/53 2:31 +1.98++ 1.Kh6 (855.228.843) 5661
40/53 19:17 +3.96++ 1.Kh6 (5.843.981.299) 5048
Just luck possibly. Amazingly, if 1.Kh6 Be5 2. Kg7 it seems to be already a Mate in 25 (possibly less?) I think this was a different Rainbow version and after searching the Rootposition. Not entirely sure about the _016.
[D]4kr2/5pK1/3p1Q2/1p2b1P1/4P3/1PP5/8/8 b - -
Engine: Rainbow Serpent 20162803_016 MP (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
25/35 0:02 +M32 2...Bg3 3.c4 b4 4.c5 dxc5 5.Qc6+ Ke7
6.Qb7+ Ke6 7.Kxf8 Ke5 8.Kxf7 c4 9.g6 Kf4
10.g7 c3 11.g8Q Be1 12.Qd5 Bh4
13.Qf5+ Ke3 14.Qh3+ Kf4 15.Qxh4+ Ke3 (13.482.554) 6408
.
.
.
43/51 8:56 +M24 2...Bg3 3.c4 bxc4 4.e5 Bxe5 5.bxc4 Bg3
6.c5 Be5 7.cxd6 Bxf6+ 8.gxf6 Rh8
9.Kxh8 Kd7 10.Kg7 Ke8 11.d7+ Kxd7
12.Kxf7 Kd6 13.Ke8 Ke5 14.f7 Kf4
15.f8Q+ Ke4 (3.528.747.257) 6571
46/57 14:28 +M25 2...Bh2 3.c4 bxc4 4.e5 Bxe5 5.bxc4 Bg3
6.c5 Be5 7.cxd6 Bxf6+ 8.gxf6 Rh8
9.d7+ Kd8 10.Kxh8 Kxd7 11.Kg8 Ke6
12.Kg7 Ke5 13.Kxf7 Kd6 14.Ke8 Ke5
15.f7 Ke4 (5.755.120.716) 6628
best move: Be5-h2 time: 14:28.281 min n/s: 6.628.185 nodes: 5.755.120.716