Mate in 31 (Zugzwang)

[Hurnavich]

[d]4r3/p1p1pPp1/P1P1P1P1/5K2/3p2P1/7p/3P1ppr/3R1nkq w - - 0 1

Analysis by Sting SF 4.7:

1.fxe8N d3 2.Nf6 gxf6 3.g5 fxg5 4.g7 g4 5.g8N g3 6.Nf6 exf6 7.Kg6 f5 8.e7 f4 9.e8N f3 10.Nd6 cxd6 11.c7 d5 12.c8N d4 13.Nb6 axb6 14.a7 b5 15.a8N b4 16.Nc7 b3 17.Nb5 b2 18.Nxd4
+- (#19) Depth: 49/38 00:00:01 4955kN
(Hurnavich 13.09.2014)

[Master Om]

[d]4r3/p1p1pPp1/P1P1P1P1/5K2/3p2P1/7p/3P1ppr/3R1nkq w - - 0 1

Analysis by Sting SF 4.7:

1.fxe8N d3 2.Nf6 gxf6 3.g5 fxg5 4.g7 g4 5.g8N g3 6.Nf6 exf6 7.Kg6 f5 8.e7 f4 9.e8N f3 10.Nd6 cxd6 11.c7 d5 12.c8N d4 13.Nb6 axb6 14.a7 b5 15.a8N b4 16.Nc7 b3 17.Nb5 b2 18.Nxd4
+- (#19) Depth: 49/38 00:00:01 4955kN
(Hurnavich 13.09.2014)

In that case its the only engine apart from chest which found out.

[nabildanial]

Not so true

FEN: 4r3/p1p1pPp1/P1P1P1P1/5K2/3p2P1/7p/3P1ppr/3R1nkq w - - 0 1

Intel i7 4700MQ 8GB DDR3

DeepSaros_Human-popcnt-x64:
1 00:00 4 0 -10.96 f7xe8Q
2 00:00 35 0 -8.45 f7xe8Q d4-d3 Qe8xe7
36 00:00 5,177k 6,260k 0.00 f7xe8Q d4-d3 Qe8xe7
36+ 00:01 13,626k 8,395k +0.08 f7xe8N
38+ 00:01 13,682k 8,271k +2.56 f7xe8N
39 00:02 25,167k 9,543k +M19 f7xe8N d4-d3 Ne8-f6 g7xf6 Kf5-f4 f6-f5 g6-g7 f5xg4 g7-g8N g4-g3 Ng8-f6 e7xf6 e6-e7 f6-f5 Kf4-g5 f5-f4 e7-e8N f4-f3 Ne8-d6 c7xd6 c6-c7 d6-d5 c7-c8N d5-d4 Nc8-b6 a7xb6 a6-a7 b6-b5 a7-a8N b5-b4 Na8-b6 b4-b3 Nb6-d7 b3-b2 Nd7-e5 b2-b1R Ne5xf3+

[lech]

From ChestUCI.epd of Franz Huber


Original Position (white to move Mate in 31)
[d]4N3/B6p/n2p4/rk1P4/p6p/P3Pp1P/3N1P1b/5K2 w - - 0 1

edit: include 31.Nxd6#

WHich engines are good for mate searches? Specifically made for mate searches that I can use in Deep Firtz 14 GUI?

Each winnig move leads to mate. It is very hard to watch any mate in 31 moves. Sting-sf-47 finds 1.Ke1 very quickly and keeps it on.
To solve many postions it is needed to have a special code. In other case it remains a trick to close null-move search only.

[peter]

AFAIK the best is Houdini in mate mode. But this position is too much for all except Gustav.

Texel is soon on the right way but doesn't find the mate.
Being on track the main variant in output clearly shows it has got already the principal of the triangulation:

4N3/B6p/n2p4/rk1P4/p6p/P3Pp1P/3N1P1b/5K2 w - - 0 1

Analysis by Texel 1.04 64-bit:

1.Sxf3 Sc5 2.Lxc5 Kxc5 3.Sxh2 Ta7 4.Ke2 Kxd5 5.Sf6+
+/- (1.56 ++) Tiefe: 7 00:00:02 2kN
...
1.Sxf3 Kc4 2.Sxh2 Txd5 3.Sf3 Td1+ 4.Ke2 Td3 5.Sd2+ Kc3 6.Ld4+ Kc2
+- (2.12) Tiefe: 9 00:00:02 8kN
1.Ld4 Sc5 2.Sxf3 Le5 3.Lxe5
+- (2.14 ++) Tiefe: 9 00:00:02 10kN
...
1.Ld4 Sc5 2.Sxf3 Kc4 3.Sxh2 Sb3 4.Sf3 Txd5 5.Sc7 Sxd4 6.Sd2+
+- (2.15) Tiefe: 10 00:00:02 18kN
1.Sxf3 Kc4 2.Sxh2 Txd5 3.Sf3 Td1+ 4.Ke2 Td3 5.Sd2+ Kc3 6.Ld4+ Kc2 7.Sc4
+- (2.17 ++) Tiefe: 10 00:00:02 21kN
1.Sxf3 Kc4 2.Sxh2 Txd5 3.Sf3 Td1+ 4.Ke2 Td3 5.Sd2+ Kc3 6.Ld4+ Kc2 7.Sc4
+- (2.32 ++) Tiefe: 10 00:00:02 23kN
1.Ld4 Sc5 2.Sxf3 Kc4 3.Sxh2 Sb3 4.Sf3 Txd5 5.Sc7 Sxd4 6.Sd2+
+- (2.15) Tiefe: 10 00:00:02 24kN
...
1.Ld4 Sc5 2.Sxf3 Le5 3.Sxe5 dxe5 4.Sd6+ Kb6 5.Lxe5 Sd7 6.Sc4+ Kc5 7.Sxa5 Sxe5 8.f4 Sd7 9.d6 Kb5 10.Sb7 Kc6 11.Sd8+ Kxd6 12.Ke2 Kd5 13.Sf7 Kc4 14.Sd6+ Kd5 15.Sb5 Sc5 16.Sd4 Sd7 17.Kf2 Sc5 18.Kf3 Sb3 19.Sb5 Sd2+ 20.Kg4 Ke4 21.f5 Sc4 22.f6 Se5+
+/- (1.47) Tiefe: 32 00:02:41 3522MN
1.Ke1 Le5 2.Kd1 h6 3.Ke1
+/- (1.48 ++) Tiefe: 32 00:03:57 5220MN
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 h6 5.Kc1 Lh2 6.Kd1 Le5 7.Ke1 Lh2 8.Kf1 Le5 9.Kg1 h5 10.Kf1
+- (1.63 ++) Tiefe: 32 00:04:28 5914MN
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Ld4 Sc5 6.Sxf3 Le5 7.Sxe5 dxe5 8.Sd6+ Kb6 9.Lxe5 Sd3 10.Sc4+ Kb5 11.Sxa5 Sxe5 12.Sc6 Sc4 13.Kc1 Sxa3 14.e4 Kc5 15.f4 Sc4 16.Se5 Sd6 17.Sd7+ Kc4 18.Sf6
+/- (1.56) Tiefe: 32 00:04:45 6300MN
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 Le5 10.Kg1 h6 11.Kf1 h5 12.Kg1
+- (1.71 ++) Tiefe: 33 00:05:09 6835MN
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 Le5 10.Kg1 h6 11.Kf1 Lh2 12.Ld4 Sc5 13.Sxf3 Le5 14.Sxe5 dxe5 15.Sd6+ Kb6 16.Lxe5 Sd3 17.Sc4+ Kc5 18.Sxa5 Sxe5 19.f4 Sd7 20.e4 Kd4 21.e5 Kxd5 22.Sb7 Ke6 23.Sd8+ Kf5 24.e6 Sc5 25.e7
+/- (1.56) Tiefe: 33 00:05:27 7228MN
1.Ld4 Sc5 2.Sxf3 Le5 3.Lxe5 dxe5 4.Sxe5 Ta7 5.f4 Te7 6.Sf6 Tg7 7.d6 Tg3 8.d7 Sxd7 9.Sfxd7 Txe3 10.f5 Txa3 11.f6 Ta1+ 12.Kg2
+/- (1.57 ++) Tiefe: 33 00:06:22 8462MN
...
1.Ld4 Sc5 2.Sxf3 Le5 3.Lxe5 dxe5 4.Sxe5 Ta7 5.Sd6+ Ka6 6.f4 Ta8 7.f5 Td8 8.Sec4 Sd7 9.e4 Sf6 10.Ke2 Tg8 11.Kd3 Tg1 12.Kd4 Sd7 13.e5 Td1+ 14.Ke4 Sc5+ 15.Ke3 Sd7 16.Kf4 Td4+ 17.Kg5 Txd5 18.e6 h6+ 19.Kxh6 Sf6 20.Kg5
+- (1.73) Tiefe: 34 00:07:44 10353MN
1.e4 Lf4 2.Kg1 h6 3.Kf1 h5 4.Kg1 Le5 5.Sxf3 Kc4 6.Sxe5+ dxe5 7.Lb6 Tc5 8.Kg2 Kd3 9.d6 Tc6 10.d7 Tg6+ 11.Kf3
+- (1.74 ++) Tiefe: 34 00:11:26 15301MN
...
1.e4 Le5 2.Sxf3 Kc4 3.Sxe5+ dxe5 4.Lb6 Tc5 5.Kg2 Kb3 6.d6 Tc2 7.d7 Td2 8.d8D Txd8 9.Lxd8 Kxa3 10.Sd6 Sc5 11.Lf6 Sd7 12.Lh8 Kb3 13.Sf7 a3 14.Sxe5 Sc5 15.Kf3 a2 16.Sc6 Kc4 17.Kf4 Sd3+ 18.Ke3 Se1 19.Se5+ Kb5 20.Sd3 Sc2+ 21.Kf4 a1D 22.Lxa1 Sxa1
+- (3.11) Tiefe: 40 01:58:55 158866MN
...
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 h5 10.e4 Lf4 11.Kg1 Le5 12.Sxf3 Kc4 13.Sxe5+ dxe5 14.Lb6 Tc5 15.Kg2 Kb5 16.Lxc5 Sxc5 17.f4 Sd7 18.Kf3 Kc5 19.f5 Kc4 20.f6 Kb3 21.f7 Kxa3 22.Sf6 Sf8 23.d6 Se6 24.Sh7 Sd4+ 25.Kg2
+- (3.12 ++) Tiefe: 40 02:18:51 185487MN
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 h5 10.e4 Lf4 11.Kg1 Le5 12.Sxf3 Kc4 13.Sxe5+ dxe5 14.Lb6 Tc5 15.Kg2 Kb5 16.Lxc5 Sxc5 17.f4 Sd7 18.Kf3 Kc5 19.f5 Kc4 20.f6 Kb3 21.f7 Kxa3 22.Sf6 Sf8 23.d6 Se6 24.Sh7 Sd4+ 25.Kg2
+- (3.27 ++) Tiefe: 40 02:21:32 189156MN
1.e4 Le5 2.Sxf3 Kc4 3.Sxe5+ dxe5 4.Lb6 Tc5 5.Kg2 Kb3 6.d6 Tc2 7.d7 Td2 8.d8D Txd8 9.Lxd8 Kxa3 10.Sd6 Sc5 11.Lf6 Sd7 12.Lh8 Kb3 13.Sf7 a3 14.Sxe5 Sc5 15.Kf3 a2 16.Sc6 Kc4 17.Kf4 Sd3+ 18.Ke3 Se1 19.Se5+ Kb5 20.Sd3 Sc2+ 21.Kf4 a1D 22.Lxa1 Sxa1
+- (3.11) Tiefe: 40 02:27:01 196507MN

Pity it always gets offroad after 10 moves.
Will let it run even a little longer maybe, but a very special engine Texel is anyhow, and sorry for the german abbrevations once again

[peter]

Sting-sf-47 finds 1.Ke1 very quickly and keeps it on.

Hi Marek!

4N3/B6p/n2p4/rk1P4/p6p/P3Pp1P/3N1P1b/5K2 w - - 0 1

Analysis by Sting SF 4.7:

1.Sxf3
+/- (1.57 ++) Tiefe: 7 00:00:00 3kN
1.Sxf3
+- (1.65 ++) Tiefe: 7 00:00:00 3kN
1.Sxf3
+- (1.77 ++) Tiefe: 7 00:00:00 3kN
1.Ld4
+- (1.99 ++) Tiefe: 7 00:00:00 4kN
---
1.Ld4
+- (2.34 --) Tiefe: 21 00:00:02 9288kN
1.Ke1 Le5 2.Kd1 h5 3.Ke1 Lh2 4.Ld4 Sc5 5.Sxf3 Kc4 6.Sxh2 Kxd5 7.Sf3 Se6 8.Sf6+ Kc4 9.Se4 Ta8 10.Sxd6+ Kb3 11.Sd2+ Kxa3 12.Lc3 Tf8 13.S6c4+
+- (2.54) Tiefe: 21/34 00:00:03 14262kN
1.Ke1
+- (2.46 --) Tiefe: 22 00:00:03 16576kN
1.Ke1
+- (2.38 --) Tiefe: 22 00:00:04 16932kN
1.Ke1
+- (2.26 --) Tiefe: 22 00:00:04 18158kN
1.Ke1 Le5 2.Kd1 h6 3.Ke1 Lh2 4.Ld4 Sc5 5.Sxf3 Kc4 6.Sxh2 Kxd5 7.Sf3 Se6 8.Sf6+ Kc4 9.Se4 Kd5 10.Sc3+ Kc4 11.Se2 Tb5 12.Sd2+ Kd3 13.f4 Tb7 14.Sc1+ Kc2
+- (2.26) Tiefe: 22/34 00:00:04 18448kN
1.Ke1
+- (2.38 ++) Tiefe: 23 00:00:04 20215kN
1.Ke1
+- (2.50 ++) Tiefe: 23 00:00:04 20878kN
1.Ke1
+- (2.68 ++) Tiefe: 23 00:00:05 23190kN
1.Ke1 Le5 2.Kd1 h6 3.Ke1 Lh2 4.Kf1 h5 5.Ld4 Sc5 6.Sxf3 Kc4 7.Sxh2 Kxd5 8.Sf3 Se6 9.Lc3 Ta8 10.Sf6+ Kc4 11.Lb4 Tf8 12.Sd2+ Kd3 13.Sde4 Sg5 14.Sd7 Td8 15.Sxg5 Txd7 16.Se6 Ke4 17.Sf4
+- (2.62) Tiefe: 23/36 00:00:05 27273kN
1.Ke1
+- (2.50 --) Tiefe: 24 00:00:06 32676kN
1.Ke1 h6 2.Kd1 Le5 3.Ke1 Lh2
+- (2.58) Tiefe: 24/36 00:00:06 36682kN
1.Ke1 h6 2.Kd1 Le5 3.Ke1 Lh2
+- (2.58) Tiefe: 25/36 00:00:07 40232kN
1.Ke1
+- (2.50 --) Tiefe: 26 00:00:07 43598kN
1.Ke1
+- (2.42 --) Tiefe: 26 00:00:08 51239kN
1.Ke1
+- (2.30 --) Tiefe: 26 00:00:10 62557kN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 h6 4.Kg1 Le5 5.Sxf3 Sc5 6.Sxe5 dxe5 7.Sc7+ Kc4 8.Lb6 Tb5 9.Sxb5 Kxb5 10.Lxc5 Kxc5 11.Kf1 Kd6 12.Ke2 Kc5 13.Ke3 Kd6 14.f4 exf4+ 15.Kxf4
+- (2.34) Tiefe: 26/39 00:00:10 66753kN
1.Ke1
+- (2.46 ++) Tiefe: 27 00:00:11 69592kN
1.Ke1
+- (2.58 ++) Tiefe: 27 00:00:11 72928kN
1.Ke1
+- (2.76 ++) Tiefe: 27 00:00:13 87977kN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 h6 4.Kg1 h5 5.Kf1 Le5 6.Sxf3 Kc4 7.Sxe5+ dxe5 8.Lb6 Tc5 9.Kg2 Kb5 10.Lxc5 Sxc5 11.Sd6+ Kb6 12.Kf3 Sd3 13.Ke3 Sf4 14.Sc4+ Kc5 15.Sxe5 Sxh3 16.f4
+- (2.82) Tiefe: 27/42 00:00:14 96816kN
1.Ke1
+- (2.94 ++) Tiefe: 28 00:00:15 101MN
1.Ke1
+- (3.07 ++) Tiefe: 28 00:00:15 107MN
1.Ke1
+- (2.70 --) Tiefe: 28 00:00:17 121MN
1.Ke1
+- (2.43 --) Tiefe: 28 00:00:21 161MN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 Le5 4.Sxf3 Kc4 5.Sxe5+ dxe5 6.Lb6 Tc5 7.Kg2 Kb3 8.d6 Tc3 9.d7 Td3 10.Sf6 Txd7 11.Sxd7 Kxa3 12.Sxe5 Kb3 13.Sd3 Kc4 14.Sb2+ Kb3 15.Sxa4 Kxa4 16.e5 Kb5 17.Ld8 Sc5 18.Lxh4
+- (3.15) Tiefe: 28/45 00:00:22 170MN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 Le5 4.Sxf3 Kc4 5.Sxe5+ dxe5 6.Lb6 Tc5 7.Kg2 Kb3 8.d6 Tc3 9.d7 Td3 10.Sf6 Txd7 11.Sxd7 Kxa3 12.Sxe5 Kb3 13.Sd3 Kc4 14.Sb2+ Kb3 15.Sxa4 Kxa4 16.e5 Kb5 17.Ld8 Sc5 18.Lxh4
+- (3.15) Tiefe: 29/45 00:00:23 177MN
1.Ke1
+- (3.03 --) Tiefe: 30 00:00:25 192MN
1.Ke1
+- (2.90 --) Tiefe: 30 00:00:26 203MN
1.Ke1
+- (2.72 --) Tiefe: 30 00:00:29 228MN
1.Ke1
+- (3.27 ++) Tiefe: 30 00:00:33 264MN
1.Ke1 h6 2.Kf1 h5 3.Ke1 Le5 4.e4 Lh2 5.Kf1 Le5 6.Sxf3 Kc4 7.Sxe5+ dxe5 8.Lb6 Tc5 9.Kg2 Kb3 10.d6 Tc1 11.d7 Td1 12.Sf6 Sb8 13.d8T Txd8 14.Lxd8 Kxa3 15.Lc7 Sc6 16.Sd7 Kb3 17.Sc5+ Kb4 18.Sd3+ Kc4 19.Sxe5+ Sxe5 20.Lxe5 a3 21.f4 a2
+- (2.98) Tiefe: 30/49 00:00:34 282MN
1.Ke1
+- (2.86 --) Tiefe: 31 00:00:40 339MN
1.Ke1
+- (2.74 --) Tiefe: 31 00:00:43 377MN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 h6 4.Kg1 h5 5.Kf1 Le5 6.Sxf3 Kc4 7.Sxe5+ dxe5 8.Lb6 Tc5 9.Kg2 Kb3 10.d6 Tc1 11.d7 Td1 12.Sf6 Sb8 13.d8T Txd8 14.Lxd8 Kxa3 15.Lc7 Sc6 16.Sd7 Kb3 17.Sc5+ Kb4 18.Sd3+ Kc4 19.Sxe5+ Sxe5 20.Lxe5 a3 21.Kf3
+- (2.82) Tiefe: 31/49 00:00:44 378MN
1.Ke1
+- (2.70 --) Tiefe: 32 00:00:51 466MN
1.Ke1
+- (2.58 --) Tiefe: 32 00:00:57 525MN
1.Ld4 Sc5 2.Sxf3 Kc4 3.Sxh2 Kxd5 4.f4 Kc6 5.Sf3 Tb5 6.Ke2 Tb3 7.f5 Se4 8.Sd2 Sxd2 9.Kxd2 Kd7 10.Sf6+ Ke7 11.Se4 h6 12.Lf6+ Kf8 13.Lxh4 Txa3 14.Lg3 Tb3 15.Lxd6+ Kf7 16.Ke2 a3 17.Sd2 Tb5 18.Lxa3 Txf5 19.Sf3 Th5 20.h4 Ta5 21.Lb4 Ta4 22.Lc5 Ta5
+- (2.70) Tiefe: 32/49 00:01:28 917MN
...
1.Ld4
+- (2.64 --) Tiefe: 35 00:05:21 3789MN
1.Ke1 Le5 2.Kd1 Lh2 3.Ld4 Sc5 4.Sxf3 Le5 5.Lxe5 dxe5 6.Sxe5 Ta7 7.Ke2 Ka6 8.f4 Tb7 9.Kf3 Tb3 10.Sc7+ Ka7 11.Se6 Sb7 12.Sd4 Tb1 13.f5 Sd6 14.Kf4 Kb6 15.Sef3 Kc5 16.e4 Ta1 17.Se6+ Kc4
+- (2.82) Tiefe: 35/55 00:06:11 4368MN
1.Ke1
+- (2.70 --) Tiefe: 36 00:08:09 5989MN
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 h5 10.Ke1 Le5 11.Kd1 Lh2 12.Ld4 Sc5 13.Sxf3 Le5 14.Lxe5 dxe5 15.Sxe5 Ta7 16.f4 Kb6 17.Sc4+ Ka6 18.Ke2 Tf7 19.Sed6 Tg7 20.f5 Tg2+ 21.Kf3 Tg3+ 22.Kf4 Txh3 23.f6 Tg3
+- (2.66) Tiefe: 36/55 00:09:47 7314MN
1.Ke1
+- (2.78 ++) Tiefe: 37 00:09:52 7361MN
1.Ke1
+- (2.90 ++) Tiefe: 37 00:10:18 7681MN
1.Ke1 Le5 2.Kd1 Lh2 3.Ld4 Sc5 4.Sxf3 Le5 5.Lxe5 dxe5 6.Sxe5 Ta7 7.f4 Ka6 8.Kd2 Te7 9.Sf6 Tb7 10.Kc3 Tb1 11.f5 Th1 12.d6 Txh3 13.Kd4 Sb3+ 14.Kd5 Th1 15.d7 Td1+ 16.Kc6 Tc1+ 17.Kd6 Sc5 18.Sfg4 Sxd7 19.Kxd7 h5 20.Sh2
+- (2.58) Tiefe: 37/61 00:12:44 9613MN
1.Ke1
+- (2.70 ++) Tiefe: 38 00:12:57 9766MN
1.Ke1
+- (2.82 ++) Tiefe: 38 00:13:14 9969MN
1.Ke1 Le5 2.Kd1 Lh2 3.Ld4 Sc5 4.Sxf3 Le5 5.Lxe5 dxe5 6.Sxe5 Ta7 7.f4 Ka6 8.Kd2 Te7 9.Sf6 Tb7 10.Kc3 Tb1 11.f5 Th1 12.d6 Txh3 13.Kd4 Sb3+ 14.Kd5 Th1 15.d7 Td1+ 16.Kc6 Tc1+ 17.Kd6 Sc5 18.Sfg4 Sxd7 19.Kxd7 h5 20.Sh2
+- (2.58) Tiefe: 38/61 00:16:12 12324MN
1.Ke1
+- (2.66 ++) Tiefe: 39 00:17:50 13629MN
1.Ke1
+- (2.74 ++) Tiefe: 39 00:18:01 13774MN

BTW, Sting yet needs the 64bit compile as for my pov, not for Elo (who cares for such as for engines anymore anyhow? ) but to be able to use more than 1Gb hash.
For positions like this hash matters a lot

[Master Om]

Sting-sf-47 finds 1.Ke1 very quickly and keeps it on.

Hi Marek!

4N3/B6p/n2p4/rk1P4/p6p/P3Pp1P/3N1P1b/5K2 w - - 0 1

Analysis by Sting SF 4.7:

1.Sxf3
+/- (1.57 ++) Tiefe: 7 00:00:00 3kN
1.Sxf3
+- (1.65 ++) Tiefe: 7 00:00:00 3kN
1.Sxf3
+- (1.77 ++) Tiefe: 7 00:00:00 3kN
1.Ld4
+- (1.99 ++) Tiefe: 7 00:00:00 4kN
---
1.Ld4
+- (2.34 --) Tiefe: 21 00:00:02 9288kN
1.Ke1 Le5 2.Kd1 h5 3.Ke1 Lh2 4.Ld4 Sc5 5.Sxf3 Kc4 6.Sxh2 Kxd5 7.Sf3 Se6 8.Sf6+ Kc4 9.Se4 Ta8 10.Sxd6+ Kb3 11.Sd2+ Kxa3 12.Lc3 Tf8 13.S6c4+
+- (2.54) Tiefe: 21/34 00:00:03 14262kN
1.Ke1
+- (2.46 --) Tiefe: 22 00:00:03 16576kN
1.Ke1
+- (2.38 --) Tiefe: 22 00:00:04 16932kN
1.Ke1
+- (2.26 --) Tiefe: 22 00:00:04 18158kN
1.Ke1 Le5 2.Kd1 h6 3.Ke1 Lh2 4.Ld4 Sc5 5.Sxf3 Kc4 6.Sxh2 Kxd5 7.Sf3 Se6 8.Sf6+ Kc4 9.Se4 Kd5 10.Sc3+ Kc4 11.Se2 Tb5 12.Sd2+ Kd3 13.f4 Tb7 14.Sc1+ Kc2
+- (2.26) Tiefe: 22/34 00:00:04 18448kN
1.Ke1
+- (2.38 ++) Tiefe: 23 00:00:04 20215kN
1.Ke1
+- (2.50 ++) Tiefe: 23 00:00:04 20878kN
1.Ke1
+- (2.68 ++) Tiefe: 23 00:00:05 23190kN
1.Ke1 Le5 2.Kd1 h6 3.Ke1 Lh2 4.Kf1 h5 5.Ld4 Sc5 6.Sxf3 Kc4 7.Sxh2 Kxd5 8.Sf3 Se6 9.Lc3 Ta8 10.Sf6+ Kc4 11.Lb4 Tf8 12.Sd2+ Kd3 13.Sde4 Sg5 14.Sd7 Td8 15.Sxg5 Txd7 16.Se6 Ke4 17.Sf4
+- (2.62) Tiefe: 23/36 00:00:05 27273kN
1.Ke1
+- (2.50 --) Tiefe: 24 00:00:06 32676kN
1.Ke1 h6 2.Kd1 Le5 3.Ke1 Lh2
+- (2.58) Tiefe: 24/36 00:00:06 36682kN
1.Ke1 h6 2.Kd1 Le5 3.Ke1 Lh2
+- (2.58) Tiefe: 25/36 00:00:07 40232kN
1.Ke1
+- (2.50 --) Tiefe: 26 00:00:07 43598kN
1.Ke1
+- (2.42 --) Tiefe: 26 00:00:08 51239kN
1.Ke1
+- (2.30 --) Tiefe: 26 00:00:10 62557kN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 h6 4.Kg1 Le5 5.Sxf3 Sc5 6.Sxe5 dxe5 7.Sc7+ Kc4 8.Lb6 Tb5 9.Sxb5 Kxb5 10.Lxc5 Kxc5 11.Kf1 Kd6 12.Ke2 Kc5 13.Ke3 Kd6 14.f4 exf4+ 15.Kxf4
+- (2.34) Tiefe: 26/39 00:00:10 66753kN
1.Ke1
+- (2.46 ++) Tiefe: 27 00:00:11 69592kN
1.Ke1
+- (2.58 ++) Tiefe: 27 00:00:11 72928kN
1.Ke1
+- (2.76 ++) Tiefe: 27 00:00:13 87977kN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 h6 4.Kg1 h5 5.Kf1 Le5 6.Sxf3 Kc4 7.Sxe5+ dxe5 8.Lb6 Tc5 9.Kg2 Kb5 10.Lxc5 Sxc5 11.Sd6+ Kb6 12.Kf3 Sd3 13.Ke3 Sf4 14.Sc4+ Kc5 15.Sxe5 Sxh3 16.f4
+- (2.82) Tiefe: 27/42 00:00:14 96816kN
1.Ke1
+- (2.94 ++) Tiefe: 28 00:00:15 101MN
1.Ke1
+- (3.07 ++) Tiefe: 28 00:00:15 107MN
1.Ke1
+- (2.70 --) Tiefe: 28 00:00:17 121MN
1.Ke1
+- (2.43 --) Tiefe: 28 00:00:21 161MN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 Le5 4.Sxf3 Kc4 5.Sxe5+ dxe5 6.Lb6 Tc5 7.Kg2 Kb3 8.d6 Tc3 9.d7 Td3 10.Sf6 Txd7 11.Sxd7 Kxa3 12.Sxe5 Kb3 13.Sd3 Kc4 14.Sb2+ Kb3 15.Sxa4 Kxa4 16.e5 Kb5 17.Ld8 Sc5 18.Lxh4
+- (3.15) Tiefe: 28/45 00:00:22 170MN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 Le5 4.Sxf3 Kc4 5.Sxe5+ dxe5 6.Lb6 Tc5 7.Kg2 Kb3 8.d6 Tc3 9.d7 Td3 10.Sf6 Txd7 11.Sxd7 Kxa3 12.Sxe5 Kb3 13.Sd3 Kc4 14.Sb2+ Kb3 15.Sxa4 Kxa4 16.e5 Kb5 17.Ld8 Sc5 18.Lxh4
+- (3.15) Tiefe: 29/45 00:00:23 177MN
1.Ke1
+- (3.03 --) Tiefe: 30 00:00:25 192MN
1.Ke1
+- (2.90 --) Tiefe: 30 00:00:26 203MN
1.Ke1
+- (2.72 --) Tiefe: 30 00:00:29 228MN
1.Ke1
+- (3.27 ++) Tiefe: 30 00:00:33 264MN
1.Ke1 h6 2.Kf1 h5 3.Ke1 Le5 4.e4 Lh2 5.Kf1 Le5 6.Sxf3 Kc4 7.Sxe5+ dxe5 8.Lb6 Tc5 9.Kg2 Kb3 10.d6 Tc1 11.d7 Td1 12.Sf6 Sb8 13.d8T Txd8 14.Lxd8 Kxa3 15.Lc7 Sc6 16.Sd7 Kb3 17.Sc5+ Kb4 18.Sd3+ Kc4 19.Sxe5+ Sxe5 20.Lxe5 a3 21.f4 a2
+- (2.98) Tiefe: 30/49 00:00:34 282MN
1.Ke1
+- (2.86 --) Tiefe: 31 00:00:40 339MN
1.Ke1
+- (2.74 --) Tiefe: 31 00:00:43 377MN
1.Ke1 Le5 2.e4 Lf4 3.Kf1 h6 4.Kg1 h5 5.Kf1 Le5 6.Sxf3 Kc4 7.Sxe5+ dxe5 8.Lb6 Tc5 9.Kg2 Kb3 10.d6 Tc1 11.d7 Td1 12.Sf6 Sb8 13.d8T Txd8 14.Lxd8 Kxa3 15.Lc7 Sc6 16.Sd7 Kb3 17.Sc5+ Kb4 18.Sd3+ Kc4 19.Sxe5+ Sxe5 20.Lxe5 a3 21.Kf3
+- (2.82) Tiefe: 31/49 00:00:44 378MN
1.Ke1
+- (2.70 --) Tiefe: 32 00:00:51 466MN
1.Ke1
+- (2.58 --) Tiefe: 32 00:00:57 525MN
1.Ld4 Sc5 2.Sxf3 Kc4 3.Sxh2 Kxd5 4.f4 Kc6 5.Sf3 Tb5 6.Ke2 Tb3 7.f5 Se4 8.Sd2 Sxd2 9.Kxd2 Kd7 10.Sf6+ Ke7 11.Se4 h6 12.Lf6+ Kf8 13.Lxh4 Txa3 14.Lg3 Tb3 15.Lxd6+ Kf7 16.Ke2 a3 17.Sd2 Tb5 18.Lxa3 Txf5 19.Sf3 Th5 20.h4 Ta5 21.Lb4 Ta4 22.Lc5 Ta5
+- (2.70) Tiefe: 32/49 00:01:28 917MN
...
1.Ld4
+- (2.64 --) Tiefe: 35 00:05:21 3789MN
1.Ke1 Le5 2.Kd1 Lh2 3.Ld4 Sc5 4.Sxf3 Le5 5.Lxe5 dxe5 6.Sxe5 Ta7 7.Ke2 Ka6 8.f4 Tb7 9.Kf3 Tb3 10.Sc7+ Ka7 11.Se6 Sb7 12.Sd4 Tb1 13.f5 Sd6 14.Kf4 Kb6 15.Sef3 Kc5 16.e4 Ta1 17.Se6+ Kc4
+- (2.82) Tiefe: 35/55 00:06:11 4368MN
1.Ke1
+- (2.70 --) Tiefe: 36 00:08:09 5989MN
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 h5 10.Ke1 Le5 11.Kd1 Lh2 12.Ld4 Sc5 13.Sxf3 Le5 14.Lxe5 dxe5 15.Sxe5 Ta7 16.f4 Kb6 17.Sc4+ Ka6 18.Ke2 Tf7 19.Sed6 Tg7 20.f5 Tg2+ 21.Kf3 Tg3+ 22.Kf4 Txh3 23.f6 Tg3
+- (2.66) Tiefe: 36/55 00:09:47 7314MN
1.Ke1
+- (2.78 ++) Tiefe: 37 00:09:52 7361MN
1.Ke1
+- (2.90 ++) Tiefe: 37 00:10:18 7681MN
1.Ke1 Le5 2.Kd1 Lh2 3.Ld4 Sc5 4.Sxf3 Le5 5.Lxe5 dxe5 6.Sxe5 Ta7 7.f4 Ka6 8.Kd2 Te7 9.Sf6 Tb7 10.Kc3 Tb1 11.f5 Th1 12.d6 Txh3 13.Kd4 Sb3+ 14.Kd5 Th1 15.d7 Td1+ 16.Kc6 Tc1+ 17.Kd6 Sc5 18.Sfg4 Sxd7 19.Kxd7 h5 20.Sh2
+- (2.58) Tiefe: 37/61 00:12:44 9613MN
1.Ke1
+- (2.70 ++) Tiefe: 38 00:12:57 9766MN
1.Ke1
+- (2.82 ++) Tiefe: 38 00:13:14 9969MN
1.Ke1 Le5 2.Kd1 Lh2 3.Ld4 Sc5 4.Sxf3 Le5 5.Lxe5 dxe5 6.Sxe5 Ta7 7.f4 Ka6 8.Kd2 Te7 9.Sf6 Tb7 10.Kc3 Tb1 11.f5 Th1 12.d6 Txh3 13.Kd4 Sb3+ 14.Kd5 Th1 15.d7 Td1+ 16.Kc6 Tc1+ 17.Kd6 Sc5 18.Sfg4 Sxd7 19.Kxd7 h5 20.Sh2
+- (2.58) Tiefe: 38/61 00:16:12 12324MN
1.Ke1
+- (2.66 ++) Tiefe: 39 00:17:50 13629MN
1.Ke1
+- (2.74 ++) Tiefe: 39 00:18:01 13774MN

BTW, Sting yet needs the 64bit compile as for my pov, not for Elo (who cares for such as for engines anymore anyhow? ) but to be able to use more than 1Gb hash.
For positions like this hash matters a lot

https://www.dropbox.com/s/s76m7fzl1egft ... 4.zip?dl=0

[peter]

Wow, thanks a lot Mater Om!


Works fine here and even if it can't use more than 8G, look at the difference that already is:

4N3/B6p/n2p4/rk1P4/p6p/P3Pp1P/3N1P1b/5K2 w - - 0 1

Analysis by Sting SF 4.7 64bit:

1.Sxf3
+/- (1.57 ++) Tiefe: 7 00:00:03 3kN
1.Sxf3
+- (1.65 ++) Tiefe: 7 00:00:03 3kN
1.Sxf3
+- (1.77 ++) Tiefe: 7 00:00:03 3kN
1.Ld4
+- (1.99 ++) Tiefe: 7 00:00:03 4kN
..
1.Ld4 Sc5 2.Sxf3 Kc4 3.Sxh2 Kxd5 4.Sf3 Se6 5.Ke2 Tb5 6.Lf6 h6 7.Sd2 Tb8 8.Sg7 Sg5 9.Sf5 Ke6 10.Lxg5 hxg5 11.Sd4+ Kf7 12.Se4 Kg6 13.Kf3 Tb6 14.Sc3 Tb8 15.Sxa4 Ta8 16.Sb6 Txa3 17.Sc4 Ta6 18.Ke4 Ta2
+- (2.58) Tiefe: 31/47 00:00:35 414MN
1.Ld4
+- (2.70 ++) Tiefe: 32 00:00:38 454MN
1.Ke1 Le5 2.Kd1 h6 3.Ke1 Lh2 4.Kf1 h5 5.Ke1 Le5 6.Kd1 Lh2 7.Ld4 Sc5 8.Sxf3 Le5 9.Lxe5 dxe5 10.Sxe5 Ta7 11.Ke2 Kb6 12.Sc4+ Ka6 13.f4 Td7 14.Sed6 Sb7 15.Sxb7 Kxb7 16.e4 Tc7 17.Kd3 Tg7 18.e5 Tg3+ 19.Ke4 Txh3
+- (2.78) Tiefe: 32/49 00:00:53 671MN
...
1.Ke1 Le5 2.Kd1 Lh2 3.Ld4 Sc5 4.Sxf3 Le5 5.Lxe5 dxe5 6.Sxe5 Ta7 7.f4 Ka6 8.Ke2 Tb7 9.Kf3 Tb3 10.Sc7+ Kb6 11.Se6 Tb1 12.f5 Tf1+ 13.Ke2 Txf5 14.Sc4+ Ka7 15.Sxc5 Txd5 16.Sxa4 Tg5 17.e4 Tg2+ 18.Kf1 Tc2 19.Sab6 Kb7 20.e5 Kc7 21.e6 Kd8 22.Sd6 Ke7 23.Sf5+ Kf6
+- (2.90) Tiefe: 33/60 00:01:12 933MN
...
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 h6 10.Ke1 Le5 11.Kd1 Lh2 12.Kc1 Le5 13.Kb1 Lh2 14.Kb2 Le5+ 15.Kc1 Lh2 16.Kb2
+- (2.82) Tiefe: 41/65 00:08:27 7827MN
1.Ke1
+- (2.90 ++) Tiefe: 42 00:09:01 8329MN
...
1.Ke1
+- (#32 ++) Tiefe: 42 00:11:24 10609MN
...
1.Ke1 Le5 2.Kd1 Lh2 3.Kc1 Le5 4.Kb1 Lh2 5.Kb2 Le5+ 6.Kc1 Lh2 7.Kd1 Le5 8.Ke1 Lh2 9.Kf1 h5 10.Ke1 Le5 11.Kd1 Lh2 12.Kc1 Le5 13.Kb1 Lh2 14.Kb2 Le5+ 15.Kc1 Lh2 16.Kd1 Le5 17.Ke1 Lh2 18.Kf1 Le5 19.Kg1 Sb8 20.Sc7#
+- (#32) Tiefe: 47/67 00:11:24 10609MN

Variant and #-score doesn't fit together but I guess one can say "solved".

Pity I forgot to change to English again

[F.Huber]

Here's another mate problem that I've found in the previous issue of "Die Schwalbe":
it is listed as #19, but ChestUCI found immediately (0 sec!) a #13 (in AutoTurbo mode)!
(I wonder why they don't test their mate problems before publishing them)

[d]8/1p4p1/6P1/P3kN1P/2B1N1P1/pPp2K2/1p1b4/rn6 w - -
What are the top engines Komodo or Stockfish thinking?

BTW, I've updated again my ChestUCI database with 25 new problems (containing now 6525 mates) ...

Franz

[peter]

What are the top engines Komodo or Stockfish thinking?

BTW, I've updated again my ChestUCI database with 25 new problems (containing now 6525 mates) ...

Thanks a lot, Franz.
About your question, here is Sting again:

8/1p4p1/6P1/P3kN1P/2B1N1P1/pPp2K2/1p1b4/rn6 w - - 0 1

Analysis by Sting SF 4.7 64bit:

1.Sc5 Kf6 2.Sd7+ Kg5 3.Sc5 Kf6
= (0.00) Tiefe: 7/9 00:00:02 10kN
...
1.Sc5
= (0.08 ++) Tiefe: 20 00:00:02 2955kN
...
1.Sc5
+- (6.09 ++) Tiefe: 20 00:00:03 8231kN
...
1.Sc5
+- (88.68 ++) Tiefe: 21 00:00:06 37080kN
1.Sc5 Kf6 2.a6 Le3 3.Sxe3 Ke5 4.axb7 Sd2+ 5.Kg2 Tg1+ 6.Kxg1 b1D+ 7.Kf2 Se4+ 8.Sxe4 Kxe4 9.b8D c2 10.De8+ Kd4 11.Sf5+ Kc3 12.De5+ Kb4 13.Dd6+ Kc3 14.Dd4+ Kb4 15.Dd2+
+- (88.68) Tiefe: 21/44 00:00:06 37080kN
1.Sc5
+- (#13 ++) Tiefe: 22 00:00:06 37234kN
1.Sc5 Kf6 2.Sd7+ Kg5 3.Sf8 Kf6 4.Ke4 Kg5 5.Le2 Kf6 6.Kd5 Kg5 7.Se6+ Kf6 8.Sc5 Kg5 9.Se4+ Kf4 10.Sf2 Kg5 11.Ke5 Lf4+ 12.Ke6
+- (#13) Tiefe: 22/44 00:00:06 37234kN
...
1.Sc5 Kf6 2.Sd7+ Kg5 3.Sf8 Kf6 4.Ke4 Kg5 5.Le2 Kf6 6.Kd5 Kg5 7.Se6+ Kf6 8.Sc5 Kg5 9.Se4+ Kf4 10.Sf2 Kg5 11.Ke5 Lf4+ 12.Ke6 Sd2
+- (#13) Tiefe: 25/44 00:01:53 1698MN

SF dev and H4 took no longer to get a #- output but then sticking to a #14 first for a while:


8/1p4p1/6P1/P3kN1P/2B1N1P1/pPp2K2/1p1b4/rn6 w - - 0 1

Analysis by Stockfish 040914 64 SSE4.2:

1.Sc5 Kf6 2.a6 Le3 3.Sxe3 c2 4.axb7 c1D 5.b8D Dh1+ 6.Kf2 Dh4+ 7.Kg2 Dh1+ 8.Kxh1 Sc3+ 9.Kh2 Th1+ 10.Kg3 Tg1+ 11.Kf4 Se2+ 12.Lxe2 Tf1+ 13.Lxf1 b1D 14.Sd5#
+- (#14) Tiefe: 52/47 00:03:38 5183MN