Page 5 of 6

Re: Funny mate in 6

Posted: Wed Feb 17, 2016 5:18 pm
by Ignacio
Spark 0.4 needs 6 seconds.

FEN: n1N3br/2p1Bpkr/1pP2R1b/pP1p1PpR/Pp4P1/1P6/1K1P4/8 w - - 0 1

Spark-0.4-win64-mp-corei:

19/37 00:01 17.376.121 14.443.990 +3,88 Rb2-c2 d5-d4 Cc8-d6 c7xd6 Tf6xd6 f7-f6 Ae7xf6+ Rg7-f7 Af6xh8 Th7xh8 Th5xh6 Th8xh6 Td6xh6 Ca8-c7 Th6-d6 Rf7-e8 Td6-d7 Cc7-d5 Td7-g7 Ag8-f7 Tg7xg5 Re8-e7 Rc2-d3 Cd5-c7
19/37 00:01 22.248.980 14.532.318 +4,19 Tf6xh6
19/38 00:01 24.306.899 14.272.988 +9,44 Tf6xh6
19/38 00:01 24.575.453 14.304.687 +9,92 Tf6xh6 Th7xh6 Th5xg5+ Th6-g6 f5-f6+ Rg7-h7 Tg5-f5 Tg6xg4 Ae7-f8 Tg4-g2 Cc8-e7 Tg2xd2+ Rb2-c1 Td2-h2 Tf5-g5 d5-d4 Tg5-g7+ Rh7-h6 Tg7-g2+ Rh6-h5 Tg2xh2+ Rh5-g5 Th2xh8 Rg5xf6 Th8xg8 Rf6-e6 Rc1-d2
20/38 00:01 26.316.218 14.396.180 +10,17 Tf6xh6
20/38 00:01 26.485.605 14.370.919 +10,67 Tf6xh6
20/41 00:02 28.504.274 14.146.041 +15,42 Tf6xh6
20/41 00:02 31.937.215 14.194.317 +20,40 Tf6xh6 Th7xh6 Th5xg5+ Th6-g6 f5-f6+ Rg7-h7 Tg5-f5 Tg6-g5 Tf5xg5 Rh7-h6 Tg5-h5+ Rh6-g6 Th5xh8 Ag8-h7 Cc8-d6 c7xd6 Th8xa8 Rg6-h6 c6-c7 Rh6-g5 c7-c8D Ah7-g6 Ae7xd6 Ag6-d3 Ta8-a7
21/41 00:02 34.635.670 14.212.421 +20,65 Tf6xh6
21/41 00:02 34.676.870 14.136.514 +21,15 Tf6xh6
21/41 00:02 37.272.731 14.199.135 +21,27 Tf6xh6 Th7xh6 Th5xg5+ Th6-g6 f5-f6+ Rg7-h7 Tg5-f5 Tg6-g5 Tf5xg5 Rh7-h6 Tg5-h5+ Rh6-g6 Th5xh8 Ag8-h7 Cc8-d6 c7xd6 Th8xa8 Rg6-g5 c6-c7 Rg5xg4 c7-c8D+ Ah7-f5 Dc8-b7 Af5-e4 Db7xb6 Rg4-f5 Db6xa5
22/41 00:02 42.875.451 14.368.448 +21,52 Tf6xh6
22/41 00:03 45.538.261 14.502.630 +21,41 Tf6xh6 Th7xh6 Th5xg5+ Th6-g6 f5-f6+ Rg7-h7 Tg5-f5 Tg6-g5 Tf5xg5 Rh7-h6 Tg5-h5+ Rh6-g6 Th5xh8 Ag8-h7 Cc8-d6 c7xd6 Th8xa8 Rg6-g5 c6-c7 d5-d4 c7-c8D Ah7-e4 Ta8-a6 d6-d5 Ta6xb6 Rg5-f4 Ae7-d6+ Rf4-g5
23/41 00:03 52.995.834 14.749.745 +21,66 Tf6xh6
23/41 00:03 53.077.805 14.707.067 +22,16 Tf6xh6
23/43 00:03 57.194.805 14.882.853 +22,37 Tf6xh6 Th7xh6 Th5xg5+ Th6-g6 f5-f6+ Rg7-h7 Tg5-f5 Tg6-g5 Tf5xg5 Rh7-h6 Tg5-h5+ Rh6-g6 Th5xh8 Ag8-h7 Cc8-d6 c7xd6 Th8xa8 Rg6-g5 c6-c7 d5-d4 c7-c8D Ah7-e4 Ae7-d8 Ae4-g2 Ad8xb6 Ag2xa8 Dc8-g8+ Rg5xf6 Dg8-d8+ Rf6-g6 Dd8xa8
24/43 00:04 74.567.734 15.149.885 +22,62 Tf6xh6
24/43 00:04 74.758.562 15.142.508 +23,12 Tf6xh6
24/53 00:05 82.061.596 15.312.856 +23,22 Tf6xh6 Th7xh6 Th5xg5+ Th6-g6 f5-f6+ Rg7-h7 Tg5-f5 Tg6-g5 Tf5xg5 Rh7-h6 Tg5-h5+ Rh6-g6 Th5xh8 Ag8-h7 Cc8-d6 c7xd6 Th8xa8 Rg6-g5 c6-c7 d5-d4 c7-c8D Ah7-e4 Ae7-d8 Ae4-g6 Ad8xb6 Rg5xf6 Ab6xd4+ Rf6-g5 Ta8xa5 d6-d5 Dc8-d8+ Rg5xg4 Dd8xd5
24/53 00:06 95.024.782 15.436.124 +290,00 Th5-h1
24/53 00:06 102.620.998 15.865.955 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
25/53 00:06 103.515.037 15.925.390 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
26/53 00:06 105.014.232 16.040.053 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
27/53 00:06 106.482.733 16.111.776 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
28/53 00:06 108.190.143 16.215.549 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
29/53 00:06 109.862.128 16.314.542 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
30/53 00:06 111.814.620 16.414.359 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
31/53 00:06 113.809.908 16.518.128 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+
32/53 00:06 116.161.142 16.670.657 +M6 Th5-h1 d5-d4 Th1-a1 d4-d3 Ta1-a3 b4xa3+ Rb2-a1 a3-a2 Ae7-a3 Rg7xf6 Aa3-b2+

Re: Funny mate in 6

Posted: Wed Feb 17, 2016 5:59 pm
by pilgrimdan
Sergei S. Markoff wrote:[d]n1N3br/2p1Bpkr/1pP2R1b/pP1p1PpR/Pp4P1/1P6/1K1P4/8 w - - 0 1;

1.Rh1 d4 2.Ra1! d3 3.Ra3! bxa3+ 4.Ka1! a2 5.Ba3 Kxf6 6.Bb2#

Fritz 14, Stockfish and Smarthink are failed to find it in reasonable time.
Chessmaster 9000 (default) ...

finds mate in 6 in 1 minute

Time Depth Score Positions Moves
---- ---- ---- ---- ----
0:00 1/4 2.14 8149 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf8
4.Bxh8
0:00 1/5 2.20 12828 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7
4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6
0:00 1/6 2.00 28374 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7
4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6
Nc7 7.d4
0:00 1/7 2.00 66191 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7
4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6
Nc7 7.d4
0:00 1/8 2.27 159733 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf8
4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6
Nc7 7.Rg6 Bf7 8.Rxg5
0:00 1/9 2.22 442736 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf8
4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6
Nc7 7.Rg6 Bf7 8.Rxg5 d4
0:01 2/10 2.68 958224 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7
4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6
Ke7 7.Rg6 Bf7 8.Rxg5 Kf6
0:08 3/11 2.37 5681596 1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7
4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6
Ke7 7.d4 Bf7 8.Rh8 Nc7 9.Rb8
0:13 3/11 2.69 8351078 1.Kc2 d4 2.Nd6 cxd6 3.Rxd6 f6 4.Bxf6+
Kf7 5.Bxh8 Rxh8 6.Rhxh6 Rxh6 7.Rxh6
Nc7 8.Rd6 Ke8 9.Rxd4 Nd5
0:25 3/11 Mate08 16278141 1.Rh1 d4 2.Rc1 d3 3.Nd6 cxd6 4.c7
Nxc7 5.Rxc7 d5 6.Rxb6 f6 7.Bxf6+
Kf8 8.Rb8#
0:33 4/12 Mate08 22680153 1.Rh1 d4 2.Rc1 d3 3.Nd6 cxd6 4.c7
Nxc7 5.Rxc7 d5 6.Rxb6 f6 7.Bxf6+
Kf8 8.Rb8#
1:04 5/13 Mate06 46807975 1.Rh1 d4 2.Ra1 d3 3.Ra3 bxa3+ 4.Ka1
a2 5.Ba3 Kxf6 6.Bb2#

Re: Funny mate in 6

Posted: Wed Feb 17, 2016 6:11 pm
by Sergei S. Markoff
But the right move is Rh1 ;)

Re: Funny mate in 6

Posted: Wed Feb 17, 2016 6:23 pm
by F. Bluemers
Sergei S. Markoff wrote:But the right move is Rh1 ;)
Yes,given by Dirty:

Code: Select all

18       #6    8.32M     0:02.89   Rh1 d4 Ra1 d3 Ra3 bxa3+ Ka1 a2 Ba3 Kxf6 Bb2# 
The last iteration is on top
Nice position :-)
Best Fonzy

Re: Funny mate in 6

Posted: Wed Feb 17, 2016 10:19 pm
by abik
Older version of bikjump sees this one quickly.

Code: Select all

uci         
id name BikJump v1.8 (32-bit)
id author Aart J.C. Bik
option name Hash type spin default 4 min 1 max 1024
option name NalimovPath type string default <empty>
option name NalimovCache type spin default 1 min 1 max 512
option name Ponder type check default true
uciok
position fen n1N3br/2p1Bpkr/1pP2R1b/pP1p1PpR/Pp4P1/1P6/1K1P4/8 w - - 0 1
go
info depth 1 seldepth 11 nodes 174 tbhits 0 time 0 score cp -390 pv f6h6  
info depth 1 seldepth 11 nodes 735 tbhits 0 time 1 score cp -295 pv c8a7  
info depth 1 seldepth 11 nodes 915 tbhits 0 time 2 score cp -294 pv h5h3  
info depth 1 seldepth 11 nodes 927 tbhits 0 time 2 score cp -292 pv d2d3  
info depth 1 seldepth 11 nodes 930 tbhits 0 time 2 score cp -289 pv b2a2  
info depth 1 seldepth 11 nodes 932 tbhits 0 time 2 score cp -276 pv b2c1  
info depth 2 seldepth 13 nodes 1586 tbhits 0 time 3 score cp -276 pv b2c1  d5d4  h5h3  
info depth 2 seldepth 13 nodes 2209 tbhits 0 time 5 score cp -274 pv b2b1  d5d4  b1c1  
info depth 2 seldepth 13 nodes 4677 tbhits 0 time 9 score cp 0 pv d2d4  
info depth 3 seldepth 3 nodes 6198 tbhits 0 time 11 score cp 0 pv d2d4  
info depth 4 seldepth 4 nodes 10203 tbhits 0 time 18 score cp 0 pv d2d4  
info depth 5 seldepth 5 nodes 63721 tbhits 0 time 60 score cp 0 pv d2d4  
info depth 6 seldepth 6 nodes 80400 currmovenumber 1 currmove d2d4  
info depth 6 seldepth 6 nodes 80401 tbhits 0 time 73 score cp 0 pv d2d4  
info depth 6 seldepth 6 nodes 80401 currmovenumber 2 currmove c8a7  
info depth 6 seldepth 21 nodes 102568 currmovenumber 3 currmove c8d6  
info depth 6 seldepth 21 nodes 117980 tbhits 0 time 114 score cp 59 pv c8d6  c7d6  f6d6  a8c7  e7f6  g7f8  f6h8  h7h8  
info depth 6 seldepth 21 nodes 117980 currmovenumber 4 currmove e7d8  
info depth 6 seldepth 21 nodes 120101 currmovenumber 5 currmove e7c5  
info depth 6 seldepth 21 nodes 120384 currmovenumber 6 currmove e7d6  
info depth 6 seldepth 21 nodes 120637 currmovenumber 7 currmove f6d6  
info depth 6 seldepth 21 nodes 121301 currmovenumber 8 currmove f6e6  
info depth 6 seldepth 21 nodes 122303 currmovenumber 9 currmove h5h1  
info depth 6 seldepth 23 nodes 174075 currmovenumber 10 currmove h5h2  
info depth 6 seldepth 23 nodes 199689 currmovenumber 11 currmove f6h6  
info depth 6 seldepth 23 nodes 201000 currmovenumber 12 currmove h5h6  
info depth 6 seldepth 23 nodes 201537 currmovenumber 13 currmove c8b6  
info depth 6 seldepth 23 nodes 202532 currmovenumber 14 currmove e7b4  
info depth 6 seldepth 23 nodes 203125 currmovenumber 15 currmove f6f7  
info depth 6 seldepth 23 nodes 203126 currmovenumber 16 currmove h5g5  
info depth 6 seldepth 23 nodes 203127 currmovenumber 17 currmove e7f8  
info depth 6 seldepth 23 nodes 203128 currmovenumber 18 currmove f6g6  
info depth 6 seldepth 23 nodes 203129 currmovenumber 19 currmove b2b1  
info depth 6 seldepth 23 nodes 223508 currmovenumber 20 currmove b2a1  
info depth 6 seldepth 23 nodes 237664 currmovenumber 21 currmove b2a2  
info depth 6 seldepth 23 nodes 249436 currmovenumber 22 currmove d2d3  
info depth 6 seldepth 23 nodes 271194 currmovenumber 23 currmove b2c2  
info depth 6 seldepth 23 nodes 295998 currmovenumber 24 currmove h5h3  
info depth 6 seldepth 25 nodes 315065 currmovenumber 25 currmove h5h4  
info depth 6 seldepth 25 nodes 318695 currmovenumber 26 currmove b2c1  
info depth 7 seldepth 7 nodes 328617 currmovenumber 1 currmove c8d6  
info depth 7 seldepth 19 nodes 331614 tbhits 0 time 278 score cp 59 pv c8d6  c7d6  f6d6  a8c7  e7f6  g7f8  f6h8  h7h8  
info depth 7 seldepth 19 nodes 331614 currmovenumber 2 currmove e7d8  
info depth 7 seldepth 19 nodes 331615 currmovenumber 3 currmove e7c5  
info depth 7 seldepth 19 nodes 332309 currmovenumber 4 currmove e7d6  
info depth 7 seldepth 21 nodes 334963 currmovenumber 5 currmove f6d6  
info depth 7 seldepth 21 nodes 338941 currmovenumber 6 currmove f6e6  
info depth 7 seldepth 21 nodes 341023 currmovenumber 7 currmove h5h1  
info depth 7 seldepth 21 nodes 341024 currmovenumber 8 currmove h5h2  
info depth 7 seldepth 21 nodes 341025 currmovenumber 9 currmove f6h6  
info depth 7 seldepth 21 nodes 343282 currmovenumber 10 currmove h5h6  
info depth 7 seldepth 21 nodes 343283 currmovenumber 11 currmove c8b6  
info depth 7 seldepth 21 nodes 354485 currmovenumber 12 currmove e7b4  
info depth 7 seldepth 21 nodes 355996 currmovenumber 13 currmove f6f7  
info depth 7 seldepth 21 nodes 360121 currmovenumber 14 currmove h5g5  
info depth 7 seldepth 21 nodes 365414 currmovenumber 15 currmove e7f8  
info depth 7 seldepth 25 nodes 385303 currmovenumber 16 currmove f6g6  
info depth 7 seldepth 25 nodes 392087 currmovenumber 17 currmove b2b1  
info depth 7 seldepth 25 nodes 392088 currmovenumber 18 currmove b2a1  
info depth 7 seldepth 25 nodes 392089 currmovenumber 19 currmove b2a2  
info depth 7 seldepth 25 nodes 392090 currmovenumber 20 currmove d2d3  
info depth 7 seldepth 25 nodes 392091 currmovenumber 21 currmove b2c2  
info depth 7 seldepth 25 nodes 392092 currmovenumber 22 currmove h5h3  
info depth 7 seldepth 25 nodes 392093 currmovenumber 23 currmove h5h4  
info depth 7 seldepth 25 nodes 392094 currmovenumber 24 currmove b2c1  
info depth 7 seldepth 25 nodes 392095 currmovenumber 25 currmove d2d4  
info depth 7 seldepth 25 nodes 392096 currmovenumber 26 currmove c8a7  
info depth 8 seldepth 8 nodes 392097 currmovenumber 1 currmove c8d6  
info depth 8 seldepth 21 nodes 443402 tbhits 0 time 362 score cp 59 pv c8d6  c7d6  f6d6  a8c7  e7f6  
info depth 8 seldepth 21 nodes 443402 currmovenumber 2 currmove e7d8  
info depth 8 seldepth 21 nodes 456480 currmovenumber 3 currmove e7c5  
info depth 8 seldepth 21 nodes 458453 currmovenumber 4 currmove e7d6  
info depth 8 seldepth 21 nodes 461030 currmovenumber 5 currmove f6d6  
info depth 8 seldepth 21 nodes 466993 currmovenumber 6 currmove f6e6  
info depth 8 seldepth 21 nodes 470925 currmovenumber 7 currmove h5h1  
info depth 8 seldepth 32 nodes 781467 tbhits 0 time 583 score mate 6 pv h5h1  d5d4  h1a1  d4d3  a1a3  b4a3  b2a1  a3a2  e7a3  g7f6  a3b2

Re: Funny mate in 6

Posted: Thu Feb 18, 2016 5:16 am
by rabbits23
Like the metaphor Dann. Komodo 9.3 can't find it in 14
minutes.
Allan

New game
n1N3br/2p1Bpkr/1pP2R1b/pP1p1PpR/Pp4P1/1P6/1K1P4/8 w - - 0 1

Analysis by Komodo 9.3 64-bit:

1.d4
= (0.00) Depth: 9 00:00:00 1kN
1.Rfxh6 Rxh6 2.Rxg5+
= (0.07 ++) Depth: 9 00:00:00 2kN
1.Rfxh6 Rxh6 2.Rxg5+
= (0.14 ++) Depth: 9 00:00:00 3kN
1.Rfxh6 Rxh6
= (0.07 --) Depth: 9 00:00:00 3kN
1.Rfxh6 Rxh6
= (-0.08 --) Depth: 9 00:00:00 4kN
1.d4
= (0.00) Depth: 9 00:00:00 4kN
1.d4
= (0.00) Depth: 10 00:00:00 4kN
1.Nd6 cxd6 2.Rxd6
= (0.07 ++) Depth: 10 00:00:00 6kN
1.Nd6 cxd6 2.Rxd6
= (0.14 ++) Depth: 10 00:00:00 6kN
1.Nd6 cxd6 2.Rxd6
+/= (0.29 ++) Depth: 10 00:00:00 6kN
1.Nd6 cxd6 2.Rxd6
+/= (0.46 ++) Depth: 10 00:00:00 6kN
1.Nd6 cxd6 2.Rxd6
+/- (0.72 ++) Depth: 10 00:00:00 7kN
1.Nd6 cxd6 2.Rxd6
+/- (1.06 ++) Depth: 10 00:00:00 7kN
1.Nd6 cxd6 2.Rxd6
+- (1.58 ++) Depth: 10 00:00:00 8kN
1.Nd6 cxd6 2.Rxd6 Nc7 3.Bf6+ Kf8 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ne8 7.Rh8 f6
+- (1.58) Depth: 10 00:00:00 9kN
1.Nd6 cxd6 2.Rxd6
+- (1.65 ++) Depth: 11 00:00:00 10kN
1.Nd6 cxd6 2.Rxd6
+- (1.73 ++) Depth: 11 00:00:00 10kN
1.Nd6 cxd6 2.Rxd6
+- (2.01 ++) Depth: 11 00:00:00 11kN
1.Nd6 cxd6 2.Rxd6
+- (2.32 ++) Depth: 11 00:00:00 11kN
1.Nd6 cxd6 2.Rxd6
+- (2.76 ++) Depth: 11 00:00:00 11kN
1.Nd6 cxd6 2.Rxd6
+- (3.12 ++) Depth: 11 00:00:00 11kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Nc7 7.Rd6 Ne8 8.Rxd5
+- (3.33) Depth: 11 00:00:00 14kN
1.Nd6 cxd6
+- (3.26 --) Depth: 12 00:00:00 18kN
1.Nd6 cxd6
+- (3.19 --) Depth: 12 00:00:00 22kN
1.Nd6 cxd6
+- (3.09 --) Depth: 12 00:00:00 25kN
1.Nd6 cxd6
+- (2.94 --) Depth: 12 00:00:00 28kN
1.Nd6 cxd6
+- (2.72 --) Depth: 12 00:00:00 31kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.f6+ Ke6 9.Rxg5 Kxf6 10.Rf5+ Ke6
+- (2.56) Depth: 12 00:00:00 35kN
1.Nd6 cxd6 2.Rxd6
+- (2.65 ++) Depth: 13 00:00:00 38kN
1.Nd6 cxd6 2.Rxd6
+- (2.72 ++) Depth: 13 00:00:00 39kN
1.Nd6 cxd6 2.Rxd6
+- (2.82 ++) Depth: 13 00:00:00 39kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Rh8 Kf7 8.d4 Nc7 9.Rh6 Ke7 10.Rg6 Bf7
+- (2.86) Depth: 13 00:00:00 46kN
1.Nd6 cxd6 2.Rxd6
+- (2.93 ++) Depth: 14 00:00:00 50kN
1.Nd6 cxd6
+- (2.86 --) Depth: 14 00:00:00 57kN
1.Nd6 cxd6
+- (2.76 --) Depth: 14 00:00:00 67kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rh8 Kf7 8.d4 Nc7 9.Kc2 Kg7 10.Rh1 Kf6 11.Rh6+ Ke7
+- (2.83) Depth: 14 00:00:00 73kN
1.Nd6 cxd6 2.Rxd6
+- (2.90 ++) Depth: 15 00:00:00 76kN
1.Nd6 cxd6 2.Rxd6
+- (2.97 ++) Depth: 15 00:00:00 81kN
1.Nd6 cxd6 2.Rxd6
+- (3.07 ++) Depth: 15 00:00:00 84kN
1.Nd6 cxd6
+- (2.98 --) Depth: 15 00:00:00 96kN
1.Nd6 cxd6 2.Rxd6
+- (3.10 ++) Depth: 15 00:00:00 102kN
1.Nd6 cxd6
+- (3.03 --) Depth: 16 00:00:00 116kN
1.Nd6 cxd6
+- (2.96 --) Depth: 16 00:00:00 137kN
1.Nd6 cxd6
+- (2.86 --) Depth: 16 00:00:00 157kN
1.Nd6 cxd6 2.Rxd6
+- (2.94 ++) Depth: 16 00:00:00 174kN
1.Nd6 cxd6 2.Rxd6
+- (3.01 ++) Depth: 17 00:00:00 182kN
1.Nd6 cxd6 2.Rxd6
+- (3.08 ++) Depth: 17 00:00:00 187kN
1.Nd6 cxd6 2.Rxd6
+- (3.18 ++) Depth: 17 00:00:00 194kN
1.Nd6 cxd6 2.Rxd6
+- (3.33 ++) Depth: 17 00:00:00 202kN
1.Nd6 cxd6 2.Rxd6
+- (3.55 ++) Depth: 17 00:00:00 220kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 Kf6 11.Kd4 Bf7 12.Rh6+ Kg7 13.Rh1 Kf6 14.Rh8
+- (3.55) Depth: 17 00:00:00 234kN
1.Nd6 cxd6 2.Rxd6
+- (3.62 ++) Depth: 18 00:00:00 253kN
1.Nd6 cxd6 2.Rxd6
+- (3.69 ++) Depth: 18 00:00:00 260kN
1.Nd6 cxd6 2.Rxd6
+- (3.79 ++) Depth: 18 00:00:00 267kN
1.Nd6 cxd6
+- (3.70 --) Depth: 18 00:00:00 289kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 d4 11.Kxd4 Kf6 12.Rh6+ Ke7 13.Ke5 Bxb3 14.Rd6 Ne8 15.Rd7+ Kf8 16.Rb7 Bxa4
+- (3.67) Depth: 18 00:00:00 329kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 d4 11.Kxd4 Kf6 12.Rh6+ Ke7 13.Ke5 Bxb3 14.Rd6 Ne8 15.Rd7+ Kf8 16.Rb7 Bxa4 17.Rxb6
+- (3.67) Depth: 19 00:00:00 396kN
1.Nd6 cxd6 2.Rxd6
+- (3.74 ++) Depth: 20 00:00:00 428kN
1.Nd6 cxd6 2.Rxd6
+- (3.81 ++) Depth: 20 00:00:00 437kN
1.Nd6 cxd6 2.Rxd6
+- (3.91 ++) Depth: 20 00:00:00 450kN
1.Nd6 cxd6
+- (3.82 --) Depth: 20 00:00:00 495kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 Kf6 11.Kd4 Ne8 12.Rh6+ Ke7 13.Ke5 d4 14.f6+ Kf7 15.Rh5 Kf8 16.Rh8 d3 17.Kf5 Nd6+ 18.Kg6 Nf7
+- (3.93) Depth: 20 00:00:00 561kN
1.Nd6 cxd6 2.Rxd6
+- (4.00 ++) Depth: 21 00:00:00 631kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 Kf6 11.Kd4 Ne8 12.Rh6+ Ke7 13.Ke5 d4 14.f6+ Kf7 15.Rh8 d3 16.Rh3 Nxf6 17.c7
+- (4.03) Depth: 21 00:00:00 703kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 Kf6 11.Kd4 Ne8 12.Rh6+ Ke7 13.Ke5 d4 14.f6+ Kf7 15.Rh8 d3 16.Rh3 Nxf6 17.c7 Nd7+ 18.Kd6
+- (4.05) Depth: 22 00:00:00 887kN
1.Nd6 cxd6
+- (3.98 --) Depth: 23 00:00:00 1119kN
1.Nd6 cxd6
+- (3.91 --) Depth: 23 00:00:00 1488kN
1.Nd6 cxd6
+- (3.81 --) Depth: 23 00:00:00 1932kN
1.Nd6 cxd6 2.Rxd6
+- (3.89 ++) Depth: 23 00:00:01 2203kN
1.Nd6 cxd6 2.Rxd6
+- (3.96 ++) Depth: 24 00:00:01 2358kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 d4 11.Kxd4 Kf6 12.Rh6+ Ke7 13.Ke5 Bxb3 14.Rd6 Ne8 15.Rd7+ Kf8 16.Rd8 Ke7 17.Rb8 Bxa4 18.f6+ Nxf6 19.c7 Nd7+ 20.Kd4 Bxb5 21.c8Q Nxb8
+- (3.96) Depth: 24 00:00:01 2635kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Kc2 Nc7 8.Rh8 Kf7 9.Kd3 Kg7 10.Rh3 d4 11.Kxd4 Kf6 12.Rh6+ Ke7 13.Ke5 Bxb3 14.Rd6 Ne8 15.Rd7+ Kf8 16.Rd8 Ke7 17.Rb8 Bxa4 18.f6+ Nxf6 19.c7 Nd7+ 20.Kd4 Bxb5 21.c8Q Nxb8 22.Qxb8
+- (3.99) Depth: 25 00:00:01 3153kN
1.Nd6 cxd6 2.Rxd6
+- (4.06 ++) Depth: 26 00:00:01 3720kN
1.Nd6 cxd6 2.Rxd6
+- (4.13 ++) Depth: 26 00:00:01 3824kN
1.Nd6 cxd6 2.Rxd6
+- (4.23 ++) Depth: 26 00:00:01 3941kN
1.Nd6 cxd6 2.Rxd6
+- (4.38 ++) Depth: 26 00:00:01 4060kN
1.Nd6 cxd6 2.Rxd6
+- (4.60 ++) Depth: 26 00:00:02 4182kN
1.Nd6 cxd6 2.Rxd6
+- (4.93 ++) Depth: 26 00:00:02 4336kN
1.Nd6 cxd6 2.Rxd6
+- (5.42 ++) Depth: 26 00:00:02 4647kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Kd7 16.Ra8 Kd6 17.f6 Ke6 18.f7 Kxf7 19.Ra7 Kf6 20.Rxb7 Ke5 21.Re7+ Kf4
+- (5.90) Depth: 26 00:00:02 5672kN
1.Nd6 cxd6
+- (5.83 --) Depth: 27 00:00:03 6223kN
1.Nd6 cxd6 2.Rxd6
+- (5.90 ++) Depth: 27 00:00:03 7129kN
1.Nd6 cxd6 2.Rxd6
+- (5.97 ++) Depth: 28 00:00:03 7604kN
1.Nd6 cxd6 2.Rxd6
+- (6.04 ++) Depth: 28 00:00:03 7800kN
1.Nd6 cxd6 2.Rxd6
+- (6.14 ++) Depth: 28 00:00:03 8102kN
1.Nd6 cxd6 2.Rxd6
+- (6.29 ++) Depth: 28 00:00:04 8528kN
1.Nd6 cxd6 2.Rxd6
+- (6.51 ++) Depth: 28 00:00:04 9248kN
1.Nd6 cxd6
+- (6.34 --) Depth: 28 00:00:04 9811kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rhxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nd7 15.Rxe8 Kxb7 16.Rg8 Kc6 17.Rxg5 Kd6 18.Rg7 Ne5 19.f6 Ke6 20.g5 Kf5 21.f7 Nxf7 22.Rxf7+ Kxg5 23.Ra7 Kf4 24.Rxa5 Ke4
+- (6.58) Depth: 28 00:00:05 10802kN
1.Nd6 cxd6 2.Rxd6
+- (6.65 ++) Depth: 29 00:00:05 12111kN
1.Nd6 cxd6
+- (6.58 --) Depth: 29 00:00:06 12659kN
1.Nd6 cxd6 2.Rxd6
+- (6.65 ++) Depth: 29 00:00:06 13708kN
1.Nd6 cxd6 2.Rxd6
+- (6.72 ++) Depth: 30 00:00:06 14491kN
1.Nd6 cxd6 2.Rxd6
+- (6.79 ++) Depth: 30 00:00:07 15282kN
1.Nd6 cxd6 2.Rxd6
+- (6.89 ++) Depth: 30 00:00:07 16034kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Nd8 16.Rg8 Kd7 17.Rxg5 Kd6 18.Rg7 Ke5 19.Ra7 Nc6 20.Ra6 Nd4 21.f6 Ne6 22.f7 Nf8 23.Rxa5 Ke6 24.Ra7 Nd7
+- (7.31) Depth: 30 00:00:09 19593kN
1.Nd6 cxd6
+- (7.24 --) Depth: 31 00:00:10 21447kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Nd8 16.Rg8 d4 17.Rxg5 Kd6 18.Rg8 Nf7 19.Ra8 Ke5 20.Rxa5+ Kf4 21.Ra7 Ne5 22.f6 Kxg4 23.f7 Ng6 24.Ra6 Nf8 25.Ra8 Ng6 26.a5 Kf5
+- (7.18) Depth: 31 00:00:12 26902kN
1.Nd6 cxd6 2.Rxd6
+- (7.25 ++) Depth: 32 00:00:13 28872kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Kxb7 15.Rxe8 Nd7 16.Rg8 Kc6 17.Rxg5 Kd6 18.Rg7 Ne5 19.g5 Nd3+ 20.Kc2 Ne1+ 21.Kd1 Nd3 22.f6 Nf4 23.Ra7 Ke6 24.Rxa5 Kf5 25.Rxd5+ Kg6 26.Rd6 Nh3 27.a5
+- (7.76) Depth: 32 00:00:17 37342kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Kxb7 15.Rxe8 Nd7 16.Rg8 Kc6 17.Rxg5 Kd6 18.Rg7 Ne5 19.g5 Nd3+ 20.Kc2 Ne1+ 21.Kd1 Nd3 22.f6 Nf4 23.Ra7 Ke6 24.Rxa5 Kf5 25.Rxd5+ Kg6 26.Rd6 Nh3 27.a5
+- (7.76) Depth: 33 00:00:19 41987kN
1.Nd6 cxd6 2.Rxd6
+- (7.83 ++) Depth: 34 00:00:22 47768kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Kxb7 15.Rxe8 Nd7 16.Rg8 Kc6 17.Rxg5 Kd6 18.Rg7 Ne5 19.g5 Nd3+ 20.Kc2 Nf4 21.Rg8 Ne2 22.Rd8+ Ke5 23.f6 Nd4+ 24.Kb2 Ke6 25.Ra8 Kf7 26.Rxa5 Kg6 27.Rxd5 Nf3 28.f7 Kxf7
+- (7.88) Depth: 34 00:00:25 54736kN
1.Nd6 cxd6 2.Rxd6
+- (7.95 ++) Depth: 35 00:00:27 60626kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Kxb7 15.Rxe8 Nd7 16.Rg8 Kc6 17.Rxg5 Kd6 18.Rg7 Ne5 19.g5 Nd3+ 20.Kc2 Nf4 21.Rg8 Ne2 22.Rd8+ Ke5 23.f6 Nd4+ 24.Kb2 Ke6 25.Ra8 Kf7 26.Rxa5 Ke6 27.Ra7 Kf5 28.f7 Ne6 29.Ra6 Nf8 30.Ra8
+- (8.31) Depth: 35 00:00:34 75224kN
1.Nd6 cxd6 2.Rxd6
+- (8.38 ++) Depth: 36 00:00:40 86407kN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Nd8 16.Rg8 Kd7 17.Rxg5 Nf7 18.Rh5 Ke7 19.g5 Kf8 20.f6 Ne5 21.Rh8+ Kf7 22.Rh7+ Kg6 23.Rg7+ Kf5 24.f7 Nxf7 25.Rxf7+ Kxg5 26.Rd7 Kf5 27.Rxd5+ Kf4 28.Rxa5 Ke4 29.Kc2 Kf4 30.Rb5 Kf3 31.Rb6 Kf2 32.Rxb4
+- (8.71) Depth: 36 00:00:55 120mN
1.Nd6 cxd6
+- (8.64 --) Depth: 37 00:01:09 149mN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Nd8 16.Rg8 Kd7 17.Rxg5 Kd6 18.Rg7 Ke5 19.Ra7 Nc6 20.Ra6 Nd8 21.Rxa5 Nc6 22.Ra6 Nd8 23.Rb6 Kf4 24.Rxb4+ Kg5 25.Rd4 Nc6 26.Rxd5 Ne7 27.Re5 Kxg4 28.Rxe7 Kxf5 29.a5 Kf6 30.Re4
+- (9.65) Depth: 37 00:01:38 216mN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Nd8 16.Rg8 Kd7 17.Rxg5 Kd6 18.Rg7 Ke5 19.Ra7 Nc6 20.Ra6 Nd8 21.Rxa5 Nc6 22.Ra6 Nd8 23.Rb6 Kf4 24.Rxb4+ Kg5 25.Rd4 Nc6 26.Rxd5 Ne7 27.Re5 Kxg4 28.Rxe7 Kxf5 29.a5
+- (9.65) Depth: 38 00:01:48 237mN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Nd8 16.Rg8 Kd7 17.Rxg5 Kd6 18.Rg7 Ke5 19.Ra7 Nc6 20.Ra6 Nd8 21.Rxa5 Nc6 22.Ra6 Nd8 23.Rb6 Kf4 24.Rxb4+ Kg5 25.Rd4 Nc6 26.Rxd5 Ne7 27.Re5 Kxg4 28.Rxe7 Kxf5 29.a5
+- (9.65) Depth: 39 00:02:00 265mN
1.Nd6 cxd6
+- (9.58 --) Depth: 40 00:02:24 318mN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Nxb7 15.Rxe8 Nd8 16.Rg8 d4 17.Rxg5 Kd6 18.Rg8 Nf7 19.Rg7 Ne5 20.g5 Nd3+ 21.Kc2 Ne1+ 22.Kd1 Nd3 23.Ra7 Nf4 24.Kc2 d3+ 25.Kb2 Nh5 26.Rxa5 Ke7 27.Ra7+ Kd6 28.Ra6+ Ke7 29.g6 Kf8 30.Ra7 Kg8 31.a5 Nf6 32.Rb7
+- (10.09) Depth: 40 00:05:46 805mN
1.Nd6 cxd6 2.Rxd6
+- (10.16 ++) Depth: 41 00:06:09 853mN
1.Nd6 cxd6 2.Rxd6 f6 3.Bxf6+ Kf7 4.Bxh8 Rxh8 5.Rdxh6 Rxh6 6.Rxh6 Ke7 7.Rg6 Bf7 8.c7 Nxc7 9.Rxb6 Be8 10.Rb7 Kd6 11.b6 Na6 12.Ra7 Nc5 13.b7 Kc7 14.Ra8 Kxb7 15.Rxe8 Nd7 16.Rg8 Kc6 17.Rxg5 Nc5 18.Rg6+ Kd7 19.g5 Ke7 20.Rg7+ Kf8 21.Rc7 Nd3+ 22.Kc2 Nf4 23.Ra7 Ne2 24.g6 Nd4+ 25.Kb2 Nc6 26.Ra8+ Kg7 27.Ra6 Ne7 28.f6+ Kxg6 29.fxe7+ Kf7 30.Rxa5 Kxe7 31.Rxd5 Ke6 32.Rd4
+- (10.87) Depth: 41 00:07:27 1029mN
1.Nd6 cxd6
+- (10.80 --) Depth: 42 00:08:02 1108mN
1.Nd6 cxd6
+- (10.73 --) Depth: 42 00:09:13 1291mN

(Johnson, 18.02.2016)

Re: Funny mate in 6

Posted: Thu Feb 18, 2016 7:25 am
by stegemma
Satana 2.2.17 doesn't have transposition tables nor null moves and find it in 153 seconds:

Code: Select all

12 476.08  15313 1396293797 Rh5-h1
I have to use a time control of 120 minutes per game, to reach ply 12.

Then the answer d5 has been found but without knowing that it is mate:

Code: Select all

12 -3.79  17551 1752632507 Pd5-d4
Then it finds immediately Ra1 at ply 10 with mate score but it seems that the stop in the search after a mate doesn't works, so it think up to ply 12 until the full allocated time for the move has expired:

Code: Select all

10 476.10  99 9746093 Rh1-a1
...
12 476.10  17111 1594986144 Rh1-a1
Finally, it finds as black that there's no moves and respond immediately as white:

Code: Select all

go
# moves 1/0 - time 166833/6673372 ms
8 -3.45  99 9492544 Pd4-d3
8 -3.45  200 19613170 Pd4-d3
126 -476.10  239 22350969 Pd4-d3
# 2401 ms 9309 Knps, TT hits&#58; 0 0.00%
move d4d3
go
# moves 1/0 - time 166773/6670971 ms
8 476.11  23 1141259 Ra1-a3
# 248 ms 4601 Knps, TT hits&#58; 0 0.00%
move a1a3
go
# moves 1/0 - time 166766/6670723 ms
126 -476.12  64 66496 Pb4xRa3
# 652 ms 101 Knps, TT hits&#58; 0 0.00%
move b4a3
go
# moves 1/0 - time 166750/6670071 ms
6 476.13  0 6876 Kb2-a1
# 11 ms 625 Knps, TT hits&#58; 0 0.00%
move b2a1
go
# moves 1/0 - time 166750/6670060 ms
126 -476.14  62 7654 Pa3-a2
# 640 ms 11 Knps, TT hits&#58; 0 0.00%
move a3a2
go
# moves 1/0 - time 166734/6669420 ms
4 476.15  0 608 Be7-a3
# 12 ms 50 Knps, TT hits&#58; 0 0.00%
move e7a3
go
# moves 1/0 - time 166733/6669408 ms
126 -476.16  26 300 Kg7xRf6
# 269 ms 1 Knps, TT hits&#58; 0 0.00%
move g7f6
go
# moves 1/0 - time 166727/6669139 ms
2 476.17  1 32 Ba3-b2
# 32 ms 1 Knps, TT hits&#58; 0 0.00%
move a3b2

Re: Funny mate in 6

Posted: Thu Feb 18, 2016 8:20 am
by BBauer
Looks like strong programs will not find Rh1 or at least take a long time.
This is because strong programs use nullmove and lmr.
with a small modification

Code: Select all

    // Step 8. Null move search with verification search &#40;is omitted in PV nodes&#41;
   if (   !PvNode
  	&&  depth       >= &#40;2 + MaxIteration*MaxIteration/256&#41; * ONE_PLY 
        &&  eval >= beta
        &&  pos.non_pawn_material&#40;pos.side_to_move&#40;))
       )
you get

Code: Select all

FEN&#58; n1N3br/2p1Bpkr/1pP2R1b/pP1p1PpR/Pp4P1/1P6/1K1P4/8 w - - 0 1

St-mod-16-02-08&#58;
 8/4	00&#58;00	 3k	691k	 0,00	d2-d3 d5-d4 Nc8-a7
 9/10	00&#58;00	 8k	1.105k	+1,40	Nc8-d6 c7xd6 Rf6xd6 Na8-c7 Be7-f6+ Kg7-f8 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6
 10/15	00&#58;00	 12k	1.235k	+2,36	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rh5xh6 Rh8xh6 Rd6xh6 Na8-c7
 11/18	00&#58;00	 20k	1.503k	+2,79	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rh5xh6 Rh8xh6 Rd6xh6 Na8-c7 Rh6-d6
 12/18	00&#58;00	 24k	1.624k	+3,15	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rh5xh6 Rh8xh6 Rd6xh6 Na8-c7 Rh6-d6 Nc7-e8 Rd6-g6
 13/25	00&#58;00	 102k	2.180k	+2,67	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rh5xh6 Rh8xh6 Rd6xh6 Kf7-e7 Rh6-h8 Ke7-f7 Kb2-c2 Kf7-g7 Rh8-h3 Na8-c7
 14/25	00&#58;00	 112k	2.187k	+2,80	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rh5xh6 Rh8xh6 Rd6xh6 Kf7-e7 Rh6-h8 Ke7-f7 Kb2-c2 d5-d4 Rh8-h6 Kf7-e7 f5-f6+ Ke7-f8
 15/31	00&#58;00	 211k	2.395k	+2,56	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-h8 Ke7-f7 Kb2-c2 Kf7-g7 Rh8-h1 Na8-c7 Kc2-d3 d5-d4 Rh1-b1 Kg7-f6 Kd3xd4 Bg8-d5
 16/31	00&#58;00	 266k	2.415k	+2,60	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-h6 Nc7xb5 a4xb5 Be8xb5
 17/31	00&#58;00	 308k	2.402k	+2,80	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 Nc7xb5 a4xb5 Be8xb5 Ra7xa5
 18/31	00&#58;00	 439k	2.347k	+3,12	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Nc7-e8 Rb6-b7+ Ke7-f6 Rb7-d7 Kf6-g7 b5-b6 Ne8-f6 Rd7-d8 Nf6xg4 b6-b7
 19/34	00&#58;00	 795k	2.533k	+3,58	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 d5-d4 b5-b6 Nc7-d5 b6-b7 Kd6-c7 Ra7-a8 Kc7xb7 Ra8xe8
 20/34	00&#58;00	 1.389k	2.666k	+3,58	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 d5-d4 b5-b6 Nc7-d5 b6-b7 Kd6-c7 Ra7-a8 Kc7xb7 Ra8xe8 Nd5-f6 Re8-e7+ Kb7-b8 Kb2-c2 Nf6xg4
 21/46	00&#58;00	 1.933k	2.677k	+3,89	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 d5-d4 b5-b6 Nc7-d5 b6-b7 Kd6-c7 Ra7-a8 Kc7xb7 Ra8xe8 Nd5-f6 Re8-e5 Nf6xg4 Re5xa5
 22/46	00&#58;00	 2.145k	2.698k	+3,89	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 d5-d4 b5-b6 Nc7-d5 b6-b7 Kd6-c7 Ra7-a8 Kc7xb7 Ra8xe8 Nd5-f6 Re8-e5 Nf6xg4 Re5xa5 Kb7-c7 Ra5-a7+ Kc7-d6 Ra7-g7 Kd6-e5
 23/46	00&#58;01	 3.080k	2.798k	+3,98	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 d5-d4 b5-b6 Nc7-d5 b6-b7 Kd6-c7 Ra7-a8 Kc7xb7 Ra8xe8 Nd5-f6 Re8-e5 Nf6xg4 Re5xa5 Kb7-c7 Kb2-c2 Ng4-f6 Kc2-d3
 24/48	00&#58;01	 5.279k	2.891k	+4,56	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 d5-d4 b5-b6 Nc7-d5 b6-b7 Kd6-c7 Ra7-a8 Kc7xb7 Ra8xe8 Kb7-c7 Re8-g8 Kc7-d6 Rg8xg5 Nd5-f6 Rg5-g6 Kd6-e5 d2-d3 Nf6-d7 Rg6-e6+ Ke5-d5
 25/48	00&#58;03	 10.899k	2.855k	+4,59	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 Be8xb5 a4xb5 Nc7xb5 Ra7-a6+ Kd6-e7 Ra6xa5 Nb5-c7 Ra5-a4 Nc7-e8 Ra4xb4 Ne8-f6 Kb2-c3 Ke7-f7 Rb4-b7+ Kf7-f8 Kc3-d4 Nf6xg4 Kd4xd5
 26/48-	00&#58;11	 32.069k	2.856k	+4,52	Nc8-d6 c7xd6
 26/48+	00&#58;11	 32.103k	2.855k	+4,59	Nc8-d6
 26/48+	00&#58;11	 32.117k	2.855k	+5,08	Nc8-d6
 26/48	00&#58;11	 32.673k	2.857k	+5,19	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 Be8-d7 b5-b6 Nc7-e8 b6-b7 Kd6-c7 b7-b8N+ Kc7xb8 Ra7xd7 Ne8-f6 Rd7-g7 Kb8-c8 Rg7xg5 Kc8-d7 Rg5-g7+ Kd7-e8 g4-g5 Nf6-e4 Rg7-a7 Ne4xg5 Ra7xa5 Ke8-d7
 27/50+	00&#58;12	 34.483k	2.864k	+5,26	Nc8-d6
 27/50+	00&#58;12	 34.662k	2.863k	+5,33	Nc8-d6
 27/50-	00&#58;12	 35.462k	2.863k	+5,25	Nc8-d6 c7xd6
 27/50+	00&#58;12	 36.959k	2.865k	+5,35	Nc8-d6
 27/50-	00&#58;13	 37.309k	2.861k	+5,23	Nc8-d6 c7xd6
 27/50	00&#58;13	 37.574k	2.859k	+5,35	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 Be8-d7 b5-b6 Nc7-e8 b6-b7 Kd6-c7 b7-b8N+ Kc7xb8 Ra7xd7 Ne8-f6 Rd7-g7 Kb8-c8 Rg7xg5 Kc8-d7 Rg5-g7+ Kd7-e8 g4-g5 Nf6-e4 d2-d3 Ke8-f8 Rg7-g6 Ne4-c5
 28/50+	00&#58;16	 47.328k	2.808k	+5,42	Nc8-d6
 28/50	00&#58;16	 47.561k	2.802k	+5,38	Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xh8 Rh7xh8 Rd6xh6 Rh8xh6 Rh5xh6 Kf7-e7 Rh6-g6 Bg8-f7 c6-c7 Na8xc7 Rg6xb6 Bf7-e8 Rb6-b7 Ke7-d6 Rb7-a7 Be8-d7 b5-b6 Nc7-e8 b6-b7 Kd6-c7 b7-b8N+ Kc7xb8 Ra7xd7 Ne8-f6 Rd7-g7 Kb8-c8 Rg7xg5 Kc8-d7 Rg5-g7+ Kd7-d6 g4-g5 Nf6-e4 d2-d4 Kd6-c6 f5-f6 Ne4-d6
 29/50+	00&#58;20	 57.051k	2.787k	+5,45	Nc8-d6
 29/50+	00&#58;21	 59.640k	2.789k	+5,52	Nc8-d6
 29/50+	00&#58;22	 63.664k	2.774k	+5,62	Rh5-h3
 29/50+	00&#58;34	 96.816k	2.791k	+7,06	Rh5-h3
 29/52	00&#58;42	 119.461k	2.783k	+7,56	Rh5-h3 d5-d4 Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xd4 Na8-c7 Rd6-d7+ Kf7-f8 Bd4xh8 Rh7xd7 c6xd7 Kf8-e7 Rh3xh6 Ke7xd7 Bh8-d4 Nc7-d5 Bd4xb6 Nd5-f4 Bb6xa5 Bg8-d5 Ba5xb4 Bd5-e4 Rh6-h7+ Kd7-c8 Bb4-e7 Be4-f3 f5-f6 Bf3xg4 f6-f7 Nf4-g6 Rh7-g7 Bg4-e6 Be7-d6 g5-g4 a4-a5 g4-g3 Rg7xg6 Be6xf7 Rg6xg3
 30/52+	00&#58;52	 145.018k	2.742k	+7,63	Rh5-h3
 30/52+	00&#58;53	 147.034k	2.747k	+7,70	Rh5-h3
 30/52+	00&#58;58	 160.317k	2.761k	+7,96	Rh5-h3
 30/52	01&#58;07	 186.964k	2.789k	+8,11	Rh5-h3 d5-d4 Nc8-d6 c7xd6 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xd4 Na8-c7 Rd6-d7+ Kf7-f8 Bd4xh8 Rh7xd7 c6xd7 Kf8-e7 Rh3xh6 Ke7xd7 Bh8-d4 Nc7-e8 Bd4xb6 Bg8-d5 Rh6-g6 Bd5-f3 Rg6xg5 Bf3-e4 Bb6xa5 Be4-d5 Rg5-g6 Kd7-c8 Ba5xb4 Bd5-f3 g4-g5 Kc8-d8 Rg6-e6 Bf3-g4 Re6-e5 Ne8-g7 Bb4-a5+ Kd8-d7 Re5-d5+ Kd7-e8 Rd5-d8+ Ke8-f7 Rd8-d7+ Kf7-e8 Rd7xg7
 31/52+	01&#58;20	 226.855k	2.813k	+8,18	Rh5-h3
 31/53+	01&#58;20	 227.760k	2.813k	+8,25	Rh5-h3
 31/53+	01&#58;20	 227.807k	2.813k	+8,36	Rh5-h3
 31/53+	01&#58;28	 249.160k	2.815k	+8,50	Nc8-d6
 31/57+	01&#58;39	 281.467k	2.823k	+8,70	Nc8-d6
 31/57-	01&#58;41	 287.799k	2.823k	+8,54	Nc8-d6 c7xd6
 31/57	01&#58;48	 306.389k	2.821k	+8,70	Nc8-d6 c7xd6 Rh5-h3 d5-d4 Rf6xd6 f7-f6 Be7xf6+ Kg7-f7 Bf6xd4 Na8-c7 Rd6-d7+ Kf7-f8 Bd4xh8 Rh7xd7 c6xd7 Kf8-e7 Rh3xh6 Ke7xd7 Bh8-d4 Nc7-e8 Bd4xb6 Bg8-d5 Rh6-g6 Kd7-c8 Bb6xa5 Kc8-b7 Rg6xg5 Bd5-f7 Ba5xb4 Kb7-c7 Rg5-g6 Kc7-c8 Rg6-c6+ Kc8-d7 a4-a5 Ne8-c7 Rc6-d6+ Kd7-c8 b5-b6 Bf7-e8 b6xc7 Kc8xc7 Kb2-c3
 32/57+	02&#58;08	 364.177k	2.845k	+8,77	Nc8-d6
 32/57+	02&#58;10	 371.589k	2.848k	+8,84	Rh5-h3
 32/57+	02&#58;12	 378.577k	2.849k	+8,95	Rh5-h3
 32/57+	02&#58;15	 387.130k	2.850k	+9,10	Rh5-h2
 32/57+	02&#58;15	 387.176k	2.850k	+102,07	Rh5-h2
 32/57	02&#58;20	 400.251k	2.844k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 33/57	02&#58;27	 419.969k	2.838k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 34/57	02&#58;30	 428.709k	2.842k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 35/57	02&#58;35	 442.527k	2.848k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 36/57	02&#58;41	 462.013k	2.857k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 37/57	02&#58;49	 485.484k	2.865k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 38/57	02&#58;58	 514.131k	2.875k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 39/57	03&#58;08	 543.798k	2.888k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 40/57	03&#58;19	 579.376k	2.898k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 41/57	03&#58;30	 614.771k	2.918k	+M9	Rh5-h2 d5-d4 Rh2-h3 d4-d3 Be7-d8 Kg7-f8 Rh3xd3 Kf8-g7 Rd3-d7 Kg7-f8 Bd8-e7+ Kf8-g7 Be7xb4 a5xb4 Rf6-g6+ Kg7-f8 Rd7-d8+
 42/57	03&#58;45	 666.343k	2.956k	+M8	Rh5-h1 d5-d4 Rh1-c1 d4-d3 Nc8-d6 c7xd6 c6-c7 Na8xc7 Rc1xc7 d6-d5 Rf6xb6 d5-d4 Be7-f6+ Kg7-f8 Rc7-c8+
 43/57	03&#58;48	 678.744k	2.965k	+M8	Rh5-h1 d5-d4 Rh1-c1 d4-d3 Nc8-d6 c7xd6 c6-c7 Na8xc7 Rc1xc7 d6-d5 Rf6xb6 d5-d4 Be7-f6+ Kg7-f8 Rc7-c8+
 44/57	04&#58;11	 773.432k	3.078k	+M8	Rh5-h1 d5-d4 Rh1-c1 d4-d3 Nc8-d6 c7xd6 c6-c7 Na8xc7 Rc1xc7 d6-d5 Rf6xb6 d5-d4 Be7-f6+ Kg7-f8 Rc7-c8+
 45/57	04&#58;15	 793.354k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 46/57	04&#58;15	 793.354k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 47/57	04&#58;15	 793.358k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 48/57	04&#58;15	 793.359k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 49/57	04&#58;15	 793.359k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 50/57	04&#58;15	 793.401k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 51/57	04&#58;15	 793.401k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 52/57	04&#58;15	 793.402k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 53/57	04&#58;15	 793.475k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 54/57	04&#58;15	 793.476k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 55/57	04&#58;15	 793.476k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 56/57	04&#58;15	 793.549k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 57/57	04&#58;15	 793.549k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 58/57	04&#58;15	 793.550k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 59/57	04&#58;15	 793.614k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 60/57	04&#58;15	 793.614k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 61/57	04&#58;15	 793.615k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 62/57	04&#58;15	 793.684k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 63/57	04&#58;16	 794.265k	3.100k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 64/57	04&#58;16	 795.495k	3.101k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+
 65/57	04&#58;22	 811.718k	3.090k	+M6	Rh5-h1 d5-d4 Rh1-a1 d4-d3 Ra1-a3 b4xa3+ Kb2-a1 a3-a2 Be7-a3 Kg7xf6 Ba3-b2+

Kind regards
Bernhard

Re: Funny mate in 6

Posted: Thu Feb 18, 2016 8:35 am
by Dann Corbit
Jesús Muñoz made a nice summary here:
http://www.talkchess.com/forum/viewtopi ... 52&t=59276


SOLVED THE POSITION (10 engines):

As far as solvers, first the dedicated mate finders (not surprising):

Code: Select all

Seconds  Engine
 0.009   ChestUCI &#40;version?)
 0.330   SF Matefinder &#40;by Ellis&#41;
 1.000   Chest 3.19 &#40;command line version&#41; ---> the exact solving time is not reported
 1.321   SF Matefinder &#40;other version&#41;
then the general purpose engines:

Code: Select all

Seconds  Engine
 0.424   Houdini 4 Pro &#40;Tactical Mode&#41;
 0.476   Critter 1.6a
 1.930   Sting 6
 2.020   Houdini 4 Pro
 7.657   Strelka 6
49.625   Gull 3
I only gave a minute each, so I guess others can solve it.

I notice that all of the solvers except sting are at least influenced by Ivanhoe or Rybka family tree. I did not study Sting enough to know if there are any Ivanhoe/Rybka techniques in it like the huge material imbalance table.

Re: Funny mate in 6

Posted: Thu Feb 18, 2016 9:33 am
by stegemma
The easiest and dirty :) way to do a "mate solver", at the root:

Code: Select all

	vtype alfa = 450; //  -valInfinity;
and with this satana finds the mate in less time, 106 seconds:

Code: Select all

12 476.08  10602 1010503950 Rh5-h1
Of course the CPU is important, mine is an Intel i7 4790K 4GHz, only one core used, TT disabled.