Another "Brain Cramp for SF" position

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Dann Corbit
Posts: 10186
Joined: Wed Mar 08, 2006 7:57 pm
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Another "Brain Cramp for SF" position

Post by Dann Corbit » Wed Nov 28, 2018 9:39 pm


SF says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   -5.73   00:00    8023  Ng5+ Kh8 
 2   +0.00   00:00   31909  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
 3   +0.00   00:00   57287  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 4   +0.00   00:00   83648  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 5   +0.00   00:00  115430  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 6   +0.00   00:00  141156  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 7   +0.00   00:00  164483  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 8   +0.00   00:00  195134  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
 9   +0.00   00:00  227325  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
10   -0.00   00:00  252745  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
11   +0.00   00:00  277887  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
12   +0.00   00:00  304220  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
13   +0.00   00:00  338674  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
14   +0.00   00:00  376826  Ng5+ Kh8 d4 exd4 Nxf7+ Kh7 Ng5+ Kh8 
15   -0.00   00:00  402346  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
16   -0.00   00:00  523108  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
17   +0.00   00:00  554508  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
18   +0.00   00:00  590196  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
19   -0.00   00:00  624650  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
20   +0.00   00:00  695974  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
21   +0.00   00:00  873375  Ng5+ Kh8 d4 exd4 Nxf7+ Kh7 Ng5+ Kh8 
22   +0.00   00:00  909848  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
23   +0.00   00:00  940435  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
24   +0.00   00:00  970583  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
25   -0.00   00:00   1876K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
26   +0.00   00:00   1899K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
27   +0.00   00:00   1925K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
28   -0.00   00:00   2739K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
29   +0.00   00:00   2890K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
30   +0.00   00:00   2970K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 exd4 Nf7+ Kh7 Ng5+ 
31   -0.00   00:00   4360K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
32   +0.00   00:00   4523K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
33   +0.00   00:00   4738K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
34   +0.00   00:00   7081K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
35   +0.00   00:00  10110K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
36   -0.00   00:01  14305K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
37   +0.00   00:01  15170K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
38   +0.00   00:01  18009K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
39   +0.00   00:01  23534K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
40   -0.00   00:03  38494K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
41   -0.00   00:03  42362K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
42   +0.00   00:05  63647K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
43   +0.00   00:05  68813K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
44   +0.00   00:05  72078K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
45   +0.00   00:08 100636K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
46   +0.00   00:10 131579K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 exd4 Nf7+ Kh7 Ng5+ 
47   -0.00   00:12 152958K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
48   -0.00   00:17 218792K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
49   +0.00   00:17 221080K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
50   +0.00   00:20 248514K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
51   -0.00   00:30 373884K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
52   +0.00   00:30 374505K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
53   +0.00   00:31 378858K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
54   +0.00   00:33 412585K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
55   -0.00   00:58 723924K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
56   +0.00   01:10 870499K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
57   +0.00   01:14 921497K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
58   +0.00   01:43   1293M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
59   +0.00   01:45   1310M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
60   +0.00   01:56   1447M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
61   +0.00   02:24   1818M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
62   -0.00   02:59   2221M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
63   +0.00   03:23   2506M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
64   +0.00   03:39   2697M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
65   +0.00   04:09   3068M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
Sting 11.2 says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 1   +8.44   00:02      54  Ng5+ 
 2   +8.44   00:02      85  Ng5+ Kh8 
 3   +8.73   00:02     133  Ng5+ Kh8 Nxf7+ 
 4   +8.73   00:02     199  Ng5+ Kh8 Nxf7+ Kh7 
 5   +8.73   00:02     300  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ 
 6   +8.73   00:02     438  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 7   +8.48   00:02    1193  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Ng6+ Kg8 
 8   +1.74   00:02    7274  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 Bh6 Nc8 Bxg5 
 9   +3.92   00:02   12405  Ng5+ Kh8 Nxf7+ Kh7 d4 Bf8 Nc8 Qxd4 exd4 exd4 Ne5 
10   +1.74   00:02   26022  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ 
11   +2.55   00:02   41663  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 Kg8 Nb6 Bf8 Nc4 Kg7 Kf5 f6 g4 Kf7 
12   +3.07   00:02   60066  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kh6 Nb6 Bf8 Kxf6 Bxd6 Nc4 Bc7 
13   +3.76   00:02  107412  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kg8 Nb6 Bf8 Nc4 Kf7 Nxa5 Bxd6 Nxb7 Bb4 d4 
14   +4.00   00:02  140063  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kg8 Nb6 Bf8 Nc4 Kf7 Nxa5 Bxd6 Nxb7 Bb4 d4 exd4 exd4 Bc3 Nc5 
15   +4.04   00:02  190708  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 Kg8 Nb6 Bf8 Nc4 Kg7 Nxa5 Bxd6 Nxb7 Bb4 d3 Bd2 Kf5 
16   +3.96   00:02  363546  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 f6 Kg6 Bh8 g4 Kc8 Nxf6 Bxf6 Kxf6 Kd8 Kxe5 Kc8 
17   +2.63   00:02  450632  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f6 Nf7 Qxc7 bxc7 b5 axb5 a4 Nd8 Bf8 b6 Bxd6 
18   +3.76   00:02  582930  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nxe5 Kxc7 Kg5 
19   +3.56   00:02  698011  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Kg5 e4 Kf6 Kxc7 Ng5 b5 axb5 Kb6 
20   +3.56   00:02  852691  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Kg5 e4 Kf6 Kxc7 Ng5 b5 axb5 Kb6 
21   +3.56   00:02  913464  Nc8 Qd8 
22   +1.82   00:02   1495K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Bf8 Nxf7 Bxd6 Nxd6+ Kd8 Ne8 Ke7 d3 Qxe8+ Nxe8 Kxe8 g4 Ke7 g5 Kf7 Kg4 
23   +2.83   00:03   2039K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Be5 Nxa5 
24   +3.27   00:03   2580K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Be5 Nxa5 Bg7 Kg5 Ke6 Nb3 Ke7 
25   +3.03   00:03   3151K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Kf8 Kh6 Be5 Nxa5 
26   +5.17   00:04   8419K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 f5 Kg6 f4 Ng5 fxg3 Kxg7 g2 Nf3 e4 Ng1 Kc8 Kf6 Kd8 Ke5 Kc8 Kxe4 Kd8 Kf3 Kc8 Kxg2 Kd8 Nf3 
27   +5.41   00:04  14309K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Ke7 Nc8+ Kf7 Nxa7 Kg7 Nb5 b6 Nd4 
28   +6.46   00:07  36746K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Ke7 Nc8+ Kf8 Nxa7 d5 Nb5 Kf7 Nc7 Kg7 Nxd5 
29   +7.52   00:10  72374K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 Bf8 
30   +7.43   00:12  96035K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Kb7 g5 Kc8 Nb6+ Kd8 Nc4 Bc5 g6 
31   +7.60   00:14 110572K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 
32   +7.72   00:16 129902K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Kxc7 Kf7 Bxd6 g7 Bb4 g8=Q Bxd2 Qg3+ Kc6 Qg6+ Kc7 Qxe4 Bb4 Qd5 
33   +8.61   00:24 218912K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 
34   +8.85   00:28 269249K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Kxc7 Kf7 Bxd6 g7 Bb4 g8=Q Bxd2 Ke8 Bb4 Qc4+ Kd6 Qxe4 Kc7 Qc4+ Kd6 e4 Ke5 Qd5+ 
35   +9.09   00:34 338542K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 Qg7 Qc5+ Kb8 Qb6+ Qb7 Nd7+ Kc8 Qxb7+ Kxb7 
36   +9.01   00:36 354343K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 Qg7 Qc5+ Kb8 Qb6+ Qb7 Nd7+ Kc8 Qxb7+ Kxb7 Kxe4 Kc7 Ne5 
37   +9.29   00:47 483833K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Ke7 g8=Q Bb4 Qg7+ Kd8 Qg5+ Kc8 Qd5 Kd8 Kg6 Ke8 Qxe4+ Kf8 d4 
38   +9.82   01:03 676089K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Bxd6 g7 Kxc7 g8=Q Bb4 Qc4+ Kb8 Qd4 Kc8 Kg6 Kd8 Qxe4 Kc7 Qf4+ Kc8 Qe5 d6 Qe4 Kc7 
39   +9.82   01:06 705581K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kd8 
40  +10.06   01:23 905298K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kd8 Qxe4 Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 Kf6 Bb4 Ke6 Kb8 d3 
41  +10.06   01:32   1011M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 Qe4 Kb8 Kf6 Bb4 Qd5 Kc7 Ke6 
42  +10.83   02:44   1868M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 d4 Bb4 Kf6 Kb8 e4 Kc7 e5 dxe5 dxe5 b6 e6 Bc3+ Kf7 
43  +11.03   03:13   2207M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 d4 Bb4 Kf6 Kb8 e4 Kc8 e5 dxe5 dxe5 Kc7 e6 Bc3+ Kf7 
44  +11.35   04:05   2816M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 Kd8 Qb8+ Ke7 Qxb7 Bxd2 Qe4+ Kd8 Kf7 Be1 Qh1 Bg3 Qb7 Bh2 Qb6+ Bc7 Qf6+ Kc8 
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chrisw
Posts: 2186
Joined: Tue Apr 03, 2012 2:28 pm

Re: Another "Brain Cramp for SF" position

Post by chrisw » Wed Nov 28, 2018 10:17 pm

Dann Corbit wrote:
Wed Nov 28, 2018 9:39 pm

SF says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   -5.73   00:00    8023  Ng5+ Kh8 
 2   +0.00   00:00   31909  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
 3   +0.00   00:00   57287  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 4   +0.00   00:00   83648  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 5   +0.00   00:00  115430  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 6   +0.00   00:00  141156  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 7   +0.00   00:00  164483  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 8   +0.00   00:00  195134  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
 9   +0.00   00:00  227325  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
10   -0.00   00:00  252745  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
11   +0.00   00:00  277887  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
12   +0.00   00:00  304220  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
13   +0.00   00:00  338674  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
14   +0.00   00:00  376826  Ng5+ Kh8 d4 exd4 Nxf7+ Kh7 Ng5+ Kh8 
15   -0.00   00:00  402346  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
16   -0.00   00:00  523108  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
17   +0.00   00:00  554508  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
18   +0.00   00:00  590196  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
19   -0.00   00:00  624650  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
20   +0.00   00:00  695974  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
21   +0.00   00:00  873375  Ng5+ Kh8 d4 exd4 Nxf7+ Kh7 Ng5+ Kh8 
22   +0.00   00:00  909848  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
23   +0.00   00:00  940435  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
24   +0.00   00:00  970583  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
25   -0.00   00:00   1876K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
26   +0.00   00:00   1899K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
27   +0.00   00:00   1925K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
28   -0.00   00:00   2739K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
29   +0.00   00:00   2890K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
30   +0.00   00:00   2970K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 exd4 Nf7+ Kh7 Ng5+ 
31   -0.00   00:00   4360K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
32   +0.00   00:00   4523K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
33   +0.00   00:00   4738K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
34   +0.00   00:00   7081K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
35   +0.00   00:00  10110K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
36   -0.00   00:01  14305K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
37   +0.00   00:01  15170K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
38   +0.00   00:01  18009K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
39   +0.00   00:01  23534K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
40   -0.00   00:03  38494K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
41   -0.00   00:03  42362K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
42   +0.00   00:05  63647K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
43   +0.00   00:05  68813K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
44   +0.00   00:05  72078K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
45   +0.00   00:08 100636K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
46   +0.00   00:10 131579K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 exd4 Nf7+ Kh7 Ng5+ 
47   -0.00   00:12 152958K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
48   -0.00   00:17 218792K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
49   +0.00   00:17 221080K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
50   +0.00   00:20 248514K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
51   -0.00   00:30 373884K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
52   +0.00   00:30 374505K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
53   +0.00   00:31 378858K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
54   +0.00   00:33 412585K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
55   -0.00   00:58 723924K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
56   +0.00   01:10 870499K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
57   +0.00   01:14 921497K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
58   +0.00   01:43   1293M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
59   +0.00   01:45   1310M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
60   +0.00   01:56   1447M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
61   +0.00   02:24   1818M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
62   -0.00   02:59   2221M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
63   +0.00   03:23   2506M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
64   +0.00   03:39   2697M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
65   +0.00   04:09   3068M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
Sting 11.2 says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 1   +8.44   00:02      54  Ng5+ 
 2   +8.44   00:02      85  Ng5+ Kh8 
 3   +8.73   00:02     133  Ng5+ Kh8 Nxf7+ 
 4   +8.73   00:02     199  Ng5+ Kh8 Nxf7+ Kh7 
 5   +8.73   00:02     300  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ 
 6   +8.73   00:02     438  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 7   +8.48   00:02    1193  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Ng6+ Kg8 
 8   +1.74   00:02    7274  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 Bh6 Nc8 Bxg5 
 9   +3.92   00:02   12405  Ng5+ Kh8 Nxf7+ Kh7 d4 Bf8 Nc8 Qxd4 exd4 exd4 Ne5 
10   +1.74   00:02   26022  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ 
11   +2.55   00:02   41663  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 Kg8 Nb6 Bf8 Nc4 Kg7 Kf5 f6 g4 Kf7 
12   +3.07   00:02   60066  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kh6 Nb6 Bf8 Kxf6 Bxd6 Nc4 Bc7 
13   +3.76   00:02  107412  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kg8 Nb6 Bf8 Nc4 Kf7 Nxa5 Bxd6 Nxb7 Bb4 d4 
14   +4.00   00:02  140063  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kg8 Nb6 Bf8 Nc4 Kf7 Nxa5 Bxd6 Nxb7 Bb4 d4 exd4 exd4 Bc3 Nc5 
15   +4.04   00:02  190708  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 Kg8 Nb6 Bf8 Nc4 Kg7 Nxa5 Bxd6 Nxb7 Bb4 d3 Bd2 Kf5 
16   +3.96   00:02  363546  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 f6 Kg6 Bh8 g4 Kc8 Nxf6 Bxf6 Kxf6 Kd8 Kxe5 Kc8 
17   +2.63   00:02  450632  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f6 Nf7 Qxc7 bxc7 b5 axb5 a4 Nd8 Bf8 b6 Bxd6 
18   +3.76   00:02  582930  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nxe5 Kxc7 Kg5 
19   +3.56   00:02  698011  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Kg5 e4 Kf6 Kxc7 Ng5 b5 axb5 Kb6 
20   +3.56   00:02  852691  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Kg5 e4 Kf6 Kxc7 Ng5 b5 axb5 Kb6 
21   +3.56   00:02  913464  Nc8 Qd8 
22   +1.82   00:02   1495K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Bf8 Nxf7 Bxd6 Nxd6+ Kd8 Ne8 Ke7 d3 Qxe8+ Nxe8 Kxe8 g4 Ke7 g5 Kf7 Kg4 
23   +2.83   00:03   2039K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Be5 Nxa5 
24   +3.27   00:03   2580K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Be5 Nxa5 Bg7 Kg5 Ke6 Nb3 Ke7 
25   +3.03   00:03   3151K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Kf8 Kh6 Be5 Nxa5 
26   +5.17   00:04   8419K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 f5 Kg6 f4 Ng5 fxg3 Kxg7 g2 Nf3 e4 Ng1 Kc8 Kf6 Kd8 Ke5 Kc8 Kxe4 Kd8 Kf3 Kc8 Kxg2 Kd8 Nf3 
27   +5.41   00:04  14309K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Ke7 Nc8+ Kf7 Nxa7 Kg7 Nb5 b6 Nd4 
28   +6.46   00:07  36746K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Ke7 Nc8+ Kf8 Nxa7 d5 Nb5 Kf7 Nc7 Kg7 Nxd5 
29   +7.52   00:10  72374K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 Bf8 
30   +7.43   00:12  96035K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Kb7 g5 Kc8 Nb6+ Kd8 Nc4 Bc5 g6 
31   +7.60   00:14 110572K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 
32   +7.72   00:16 129902K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Kxc7 Kf7 Bxd6 g7 Bb4 g8=Q Bxd2 Qg3+ Kc6 Qg6+ Kc7 Qxe4 Bb4 Qd5 
33   +8.61   00:24 218912K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 
34   +8.85   00:28 269249K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Kxc7 Kf7 Bxd6 g7 Bb4 g8=Q Bxd2 Ke8 Bb4 Qc4+ Kd6 Qxe4 Kc7 Qc4+ Kd6 e4 Ke5 Qd5+ 
35   +9.09   00:34 338542K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 Qg7 Qc5+ Kb8 Qb6+ Qb7 Nd7+ Kc8 Qxb7+ Kxb7 
36   +9.01   00:36 354343K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 Qg7 Qc5+ Kb8 Qb6+ Qb7 Nd7+ Kc8 Qxb7+ Kxb7 Kxe4 Kc7 Ne5 
37   +9.29   00:47 483833K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Ke7 g8=Q Bb4 Qg7+ Kd8 Qg5+ Kc8 Qd5 Kd8 Kg6 Ke8 Qxe4+ Kf8 d4 
38   +9.82   01:03 676089K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Bxd6 g7 Kxc7 g8=Q Bb4 Qc4+ Kb8 Qd4 Kc8 Kg6 Kd8 Qxe4 Kc7 Qf4+ Kc8 Qe5 d6 Qe4 Kc7 
39   +9.82   01:06 705581K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kd8 
40  +10.06   01:23 905298K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kd8 Qxe4 Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 Kf6 Bb4 Ke6 Kb8 d3 
41  +10.06   01:32   1011M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 Qe4 Kb8 Kf6 Bb4 Qd5 Kc7 Ke6 
42  +10.83   02:44   1868M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 d4 Bb4 Kf6 Kb8 e4 Kc7 e5 dxe5 dxe5 b6 e6 Bc3+ Kf7 
43  +11.03   03:13   2207M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 d4 Bb4 Kf6 Kb8 e4 Kc8 e5 dxe5 dxe5 Kc7 e6 Bc3+ Kf7 
44  +11.35   04:05   2816M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 Kd8 Qb8+ Ke7 Qxb7 Bxd2 Qe4+ Kd8 Kf7 Be1 Qh1 Bg3 Qb7 Bh2 Qb6+ Bc7 Qf6+ Kc8 
Well, at least it is statistical pruning, meaning the case doesn’t arise often enough in real life to matter, as ani rating list kno

RL NN’s statistical beings that they are, possibly won’t kno either. Funny if AB’s and RL-NN’s both will fail to lern tha same stuff.

MikeGL
Posts: 901
Joined: Thu Sep 01, 2011 12:49 pm

Re: Another "Brain Cramp for SF" position

Post by MikeGL » Thu Nov 29, 2018 2:36 am

Dann Corbit wrote:
Wed Nov 28, 2018 9:39 pm

SF says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   -5.73   00:00    8023  Ng5+ Kh8 
 2   +0.00   00:00   31909  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
 3   +0.00   00:00   57287  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 4   +0.00   00:00   83648  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 5   +0.00   00:00  115430  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 6   +0.00   00:00  141156  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 7   +0.00   00:00  164483  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 8   +0.00   00:00  195134  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
 9   +0.00   00:00  227325  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
10   -0.00   00:00  252745  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
11   +0.00   00:00  277887  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
12   +0.00   00:00  304220  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
13   +0.00   00:00  338674  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
14   +0.00   00:00  376826  Ng5+ Kh8 d4 exd4 Nxf7+ Kh7 Ng5+ Kh8 
15   -0.00   00:00  402346  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
16   -0.00   00:00  523108  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
17   +0.00   00:00  554508  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
18   +0.00   00:00  590196  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
19   -0.00   00:00  624650  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
20   +0.00   00:00  695974  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
21   +0.00   00:00  873375  Ng5+ Kh8 d4 exd4 Nxf7+ Kh7 Ng5+ Kh8 
22   +0.00   00:00  909848  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
23   +0.00   00:00  940435  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
24   +0.00   00:00  970583  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
25   -0.00   00:00   1876K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
26   +0.00   00:00   1899K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
27   +0.00   00:00   1925K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
28   -0.00   00:00   2739K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
29   +0.00   00:00   2890K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
30   +0.00   00:00   2970K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 exd4 Nf7+ Kh7 Ng5+ 
31   -0.00   00:00   4360K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
32   +0.00   00:00   4523K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
33   +0.00   00:00   4738K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
34   +0.00   00:00   7081K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
35   +0.00   00:00  10110K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
36   -0.00   00:01  14305K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
37   +0.00   00:01  15170K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
38   +0.00   00:01  18009K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
39   +0.00   00:01  23534K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
40   -0.00   00:03  38494K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
41   -0.00   00:03  42362K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
42   +0.00   00:05  63647K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
43   +0.00   00:05  68813K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
44   +0.00   00:05  72078K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
45   +0.00   00:08 100636K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
46   +0.00   00:10 131579K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 exd4 Nf7+ Kh7 Ng5+ 
47   -0.00   00:12 152958K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
48   -0.00   00:17 218792K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
49   +0.00   00:17 221080K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
50   +0.00   00:20 248514K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
51   -0.00   00:30 373884K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
52   +0.00   00:30 374505K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
53   +0.00   00:31 378858K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
54   +0.00   00:33 412585K  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
55   -0.00   00:58 723924K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
56   +0.00   01:10 870499K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
57   +0.00   01:14 921497K  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
58   +0.00   01:43   1293M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
59   +0.00   01:45   1310M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
60   +0.00   01:56   1447M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
61   +0.00   02:24   1818M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
62   -0.00   02:59   2221M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
63   +0.00   03:23   2506M  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
64   +0.00   03:39   2697M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
65   +0.00   04:09   3068M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
Sting 11.2 says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 1   +8.44   00:02      54  Ng5+ 
 2   +8.44   00:02      85  Ng5+ Kh8 
 3   +8.73   00:02     133  Ng5+ Kh8 Nxf7+ 
 4   +8.73   00:02     199  Ng5+ Kh8 Nxf7+ Kh7 
 5   +8.73   00:02     300  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ 
 6   +8.73   00:02     438  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
 7   +8.48   00:02    1193  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Ng6+ Kg8 
 8   +1.74   00:02    7274  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 d4 Bh6 Nc8 Bxg5 
 9   +3.92   00:02   12405  Ng5+ Kh8 Nxf7+ Kh7 d4 Bf8 Nc8 Qxd4 exd4 exd4 Ne5 
10   +1.74   00:02   26022  Ng5+ Kh8 Nxf7+ Kh7 Ng5+ 
11   +2.55   00:02   41663  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 Kg8 Nb6 Bf8 Nc4 Kg7 Kf5 f6 g4 Kf7 
12   +3.07   00:02   60066  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kh6 Nb6 Bf8 Kxf6 Bxd6 Nc4 Bc7 
13   +3.76   00:02  107412  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kg8 Nb6 Bf8 Nc4 Kf7 Nxa5 Bxd6 Nxb7 Bb4 d4 
14   +4.00   00:02  140063  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 f6+ Kf5 Kg8 Nb6 Bf8 Nc4 Kf7 Nxa5 Bxd6 Nxb7 Bb4 d4 exd4 exd4 Bc3 Nc5 
15   +4.04   00:02  190708  Nc8 Qd8 Ng5+ Qxg5+ Kxg5 Kg8 Nb6 Bf8 Nc4 Kg7 Nxa5 Bxd6 Nxb7 Bb4 d3 Bd2 Kf5 
16   +3.96   00:02  363546  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 f6 Kg6 Bh8 g4 Kc8 Nxf6 Bxf6 Kxf6 Kd8 Kxe5 Kc8 
17   +2.63   00:02  450632  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f6 Nf7 Qxc7 bxc7 b5 axb5 a4 Nd8 Bf8 b6 Bxd6 
18   +3.76   00:02  582930  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nxe5 Kxc7 Kg5 
19   +3.56   00:02  698011  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Kg5 e4 Kf6 Kxc7 Ng5 b5 axb5 Kb6 
20   +3.56   00:02  852691  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Qxc7 dxc7 Bf8 Nxf7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Kg5 e4 Kf6 Kxc7 Ng5 b5 axb5 Kb6 
21   +3.56   00:02  913464  Nc8 Qd8 
22   +1.82   00:02   1495K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 Bf8 Nxf7 Bxd6 Nxd6+ Kd8 Ne8 Ke7 d3 Qxe8+ Nxe8 Kxe8 g4 Ke7 g5 Kf7 Kg4 
23   +2.83   00:03   2039K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Be5 Nxa5 
24   +3.27   00:03   2580K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Be5 Nxa5 Bg7 Kg5 Ke6 Nb3 Ke7 
25   +3.03   00:03   3151K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 Nxb7+ Ke7 g6 Kf8 Kh6 Be5 Nxa5 
26   +5.17   00:04   8419K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 f5 Kg6 f4 Ng5 fxg3 Kxg7 g2 Nf3 e4 Ng1 Kc8 Kf6 Kd8 Ke5 Kc8 Kxe4 Kd8 Kf3 Kc8 Kxg2 Kd8 Nf3 
27   +5.41   00:04  14309K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Ke7 Nc8+ Kf7 Nxa7 Kg7 Nb5 b6 Nd4 
28   +6.46   00:07  36746K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Ke7 Nc8+ Kf8 Nxa7 d5 Nb5 Kf7 Nc7 Kg7 Nxd5 
29   +7.52   00:10  72374K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 Bf8 
30   +7.43   00:12  96035K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Kb7 g5 Kc8 Nb6+ Kd8 Nc4 Bc5 g6 
31   +7.60   00:14 110572K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 
32   +7.72   00:16 129902K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Kxc7 Kf7 Bxd6 g7 Bb4 g8=Q Bxd2 Qg3+ Kc6 Qg6+ Kc7 Qxe4 Bb4 Qd5 
33   +8.61   00:24 218912K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 
34   +8.85   00:28 269249K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Kxc7 Kf7 Bxd6 g7 Bb4 g8=Q Bxd2 Ke8 Bb4 Qc4+ Kd6 Qxe4 Kc7 Qc4+ Kd6 e4 Ke5 Qd5+ 
35   +9.09   00:34 338542K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 Qg7 Qc5+ Kb8 Qb6+ Qb7 Nd7+ Kc8 Qxb7+ Kxb7 
36   +9.01   00:36 354343K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f5 Kg6 Bb2 Nf7+ Kc8 Kxf5 Ba3 Nb5 Qa8 Na7+ Kb8 Ne5 Qxa7 Nxd7+ Ka8 bxa7 Kxa7 g4 b5 axb5 Bxd6 g5 a4 g6 Bf8 Nxf8 a3 g7 a2 g8=Q a1=Q Qc4 Qg7 Qc5+ Kb8 Qb6+ Qb7 Nd7+ Kc8 Qxb7+ Kxb7 Kxe4 Kc7 Ne5 
37   +9.29   00:47 483833K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Ke7 g8=Q Bb4 Qg7+ Kd8 Qg5+ Kc8 Qd5 Kd8 Kg6 Ke8 Qxe4+ Kf8 d4 
38   +9.82   01:03 676089K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 f6 Nf7+ Kc8 Kg6 Qxc7 dxc7 Bf8 Kxf6 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nd6+ Bxd6 g7 Kxc7 g8=Q Bb4 Qc4+ Kb8 Qd4 Kc8 Kg6 Kd8 Qxe4 Kc7 Qf4+ Kc8 Qe5 d6 Qe4 Kc7 
39   +9.82   01:06 705581K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kd8 
40  +10.06   01:23 905298K  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kd8 Qxe4 Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 Kf6 Bb4 Ke6 Kb8 d3 
41  +10.06   01:32   1011M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 Qe4 Kb8 Kf6 Bb4 Qd5 Kc7 Ke6 
42  +10.83   02:44   1868M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 d4 Bb4 Kf6 Kb8 e4 Kc7 e5 dxe5 dxe5 b6 e6 Bc3+ Kf7 
43  +11.03   03:13   2207M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 d6 Qd5 Bc5 d4 Bb4 Kf6 Kb8 e4 Kc8 e5 dxe5 dxe5 Kc7 e6 Bc3+ Kf7 
44  +11.35   04:05   2816M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 Kd8 Qb8+ Ke7 Qxb7 Bxd2 Qe4+ Kd8 Kf7 Be1 Qh1 Bg3 Qb7 Bh2 Qb6+ Bc7 Qf6+ Kc8 
A nice study.
Forced win for black, where a N defeats a Q.
Thanks for this position.
I also checked with critter at Multi-PV==2, critter just shows 0.00 for both Nc8 and Ng5+
I told my wife that a husband is like a fine wine; he gets better with age. The next day, she locked me in the cellar.

jdart
Posts: 3835
Joined: Fri Mar 10, 2006 4:23 am
Location: http://www.arasanchess.org

Re: Another "Brain Cramp for SF" position

Post by jdart » Thu Nov 29, 2018 2:40 am

Author of this?

--Jon

peter
Posts: 1786
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Another "Brain Cramp for SF" position

Post by peter » Thu Nov 29, 2018 8:43 am

Dann Corbit wrote:
Wed Nov 28, 2018 9:39 pm
Very fine one, Dann, where did you find it?
Zugzwang arises not before 5th move, so even switching off nullmove by UCI- option doesn't help quickly, (e.g tried with komodo), yet 2MV mode does the trick as for SF.

Engine: Brainfish 241118 64 POPCNTS (8192 MB)
by Thomas Zipproth

Code: Select all

 39/07	 0:00 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (18.119.514) 30148
best move: Ne4-g5 time: 0:01.342 min  n/s: 30.148.941  nodes: 18.119.514 
 37	 0:01 	+2.19 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 Bf8 9.Nxf7 Bxd6 10.Nb5 Bc5 11.Na7+ Qxa7 12.bxa7 Bxa7 13.Nd6+ Kb8 14.g4 (44.508.466) 31633
 37	 0:01 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (44.508.466) 31633
-----
 38	 0:02 	+3.09 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.gxf4 Qxc7 12.dxc7 exf4 13.exf4 Bc5 14.f5 (93.308.229) 31694
 38	 0:02 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (93.308.229) 31694
-----
 39	 0:04 	+3.78 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (148.532.217) 32101
 38	 0:04 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (148.532.217) 32101
-----
 39	 0:05 	+3.78 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (167.706.697) 32133
 39	 0:05 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (167.706.697) 32133
-----
 40	 0:06 	+4.12 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (198.077.027) 32223
 39	 0:06 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (198.077.027) 32223
-----
 40	 0:06 	+4.12 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (201.796.318) 32240
 40	 0:06 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (201.796.318) 32240
-----
 41	 0:08 	+4.33 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (277.642.081) 32587
 40	 0:08 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (277.642.081) 32587
-----
 41	 0:09 	+4.33 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (295.830.987) 32623
 41	 0:09 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (295.830.987) 32623
-----
 42	 0:11 	+4.76 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (361.096.805) 32823
 41	 0:11 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (361.096.805) 32823
-----
 42	 0:11 	+4.76 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (386.907.660) 32774
 42	 0:11 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (386.907.660) 32774
-----
 43	 0:15 	+5.36 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.gxf4 Qxc7 12.dxc7 exf4 13.exf4 Bc5 14.f5 (521.449.546) 32971
 42	 0:15 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (521.449.546) 32971
-----
 43	 0:16 	+5.36 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.gxf4 Qxc7 12.dxc7 exf4 13.exf4 Bc5 14.f5 (542.767.474) 32980
 43	 0:16 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (542.767.474) 32980
-----
 44	 0:21 	+5.49 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (703.755.473) 32970
 43	 0:21 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (703.755.473) 32970
-----
 44	 0:23 	+5.49 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (790.703.046) 32980
 44	 0:23 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (790.703.046) 32980
-----
 45	 0:33 	+5.90 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (1.096.226.940) 33172
 44	 0:33 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.d4 exd4 4.Ng5+ Kh8 5.Nf7+ (1.096.226.940) 33172
-----
 45	 0:34 	+5.90 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 f4 11.exf4 Qxc7 12.dxc7 exf4 13.gxf4 Bc5 14.f5 (1.130.997.492) 33158
 45	 0:34 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (1.130.997.492) 33158
-----
 46	 0:43 	+6.18 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 Qxc7 11.dxc7 f4 12.gxf4 exf4 13.exf4 Bc5 14.f5 (1.435.585.081) 33317
 45	 0:43 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (1.435.585.081) 33317
-----
 46	 0:45 	+6.18 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 Qxc7 11.dxc7 f4 12.gxf4 exf4 13.exf4 Bc5 14.f5 (1.509.350.940) 33326
 46	 0:45 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (1.509.350.940) 33326
-----
 47	 1:00 	+6.71 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 Bf8 9.Nxf7 Bxd6 10.Nb5 Bc5 11.Na7+ Qxa7 12.bxa7 Bxa7 13.Nd6+ Kb8 14.g4 (2.047.882.885) 33623
 46	 1:00 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (2.047.882.885) 33623
-----
 47	 1:07 	+6.71 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 Bf8 9.Nxf7 Bxd6 10.Nb5 Bc5 11.Na7+ Qxa7 12.bxa7 Bxa7 13.Nd6+ Kb8 14.g4 (2.284.926.760) 33749
 47	 1:07 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (2.284.926.760) 33749
-----
 48	 1:24 	+7.19 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 Qxc7 11.dxc7 f4 12.exf4 exf4 13.gxf4 Bc5 14.f5 (2.875.813.244) 33896
 47	 1:24 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (2.875.813.244) 33896
-----
 48	 1:28 	+7.19 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 f5 9.Kg6 Bf8 10.Nf7 Qxc7 11.dxc7 f4 12.exf4 exf4 13.gxf4 Bc5 14.f5 (3.022.268.338) 33981
 48	 1:28 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (3.022.268.338) 33981
-----
 49	 2:12 	+7.97 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 Bf8 9.Nxf7 Bxd6 10.Nb5 Bc5 11.Na7+ Qxa7 12.bxa7 Bxa7 13.Nd6+ Kb8 14.g4 (4.546.014.017) 34366
 48	 2:12 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (4.546.014.017) 34366
-----
 49	 2:13 	+7.97 	1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.Ng5 Bf8 9.Nxf7 Bxd6 10.Nb5 Bc5 11.Na7+ Qxa7 12.bxa7 Bxa7 13.Nd6+ Kb8 14.g4 (4.585.595.445) 34367
 49	 2:13 	 0.00 	1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 (4.585.595.445) 34367
Gave it three trials, each one about as fast as that. 24 threads of 3x12GHz, 8G hash.
Peter.

lech
Posts: 1060
Joined: Sun Feb 14, 2010 9:02 pm

Re: Another "Brain Cramp for SF" position

Post by lech » Thu Nov 29, 2018 1:54 pm

What if I change the start position in simple way?

[d]8/1p1pNpbk/1q1P1p2/pP1Rn2K/P3N3/4P1P1/3P4/8 w - -

Now, first a sacrifice 1 Rxe5! fxe5 and next 2. Nc8! insted of 2.Ng5+
MonteCarlo and multiPV can't help to find 2.Nc8.
Maybe, I can't be friendly, but let me be useful.

peter
Posts: 1786
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Another "Brain Cramp for SF" position

Post by peter » Thu Nov 29, 2018 3:46 pm

lech wrote:
Thu Nov 29, 2018 1:54 pm
What if I change the start position in simple way?

[d]8/1p1pNpbk/1q1P1p2/pP1Rn2K/P3N3/4P1P1/3P4/8 w - -

Now, first a sacrifice 1 Rxe5! fxe5 and next 2. Nc8! insted of 2.Ng5+
MonteCarlo and multiPV can't help to find 2.Nc8.
Very clever, Marek!
:)
Peter.

lech
Posts: 1060
Joined: Sun Feb 14, 2010 9:02 pm

Re: Another "Brain Cramp for SF" position

Post by lech » Thu Nov 29, 2018 6:22 pm

chrisw wrote:
Wed Nov 28, 2018 10:17 pm
Dann Corbit wrote:
Wed Nov 28, 2018 9:39 pm

SF says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0  
65   +0.00   04:09   3068M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
Sting 11.2 says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
44  +11.35   04:05   2816M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 Kd8 Qb8+ Ke7 Qxb7 Bxd2 Qe4+ Kd8 Kf7 Be1 Qh1 Bg3 Qb7 Bh2 Qb6+ Bc7 Qf6+ Kc8 
Well, at least it is statistical pruning, meaning the case doesn’t arise often enough in real life to matter, as ani rating list kno

RL NN’s statistical beings that they are, possibly won’t kno either. Funny if AB’s and RL-NN’s both will fail to lern tha same stuff.
I hope that authors of THE AI know that such side statistical questions can lead to pruning: man... people... humanity?
Maybe, I can't be friendly, but let me be useful.

chrisw
Posts: 2186
Joined: Tue Apr 03, 2012 2:28 pm

Re: Another "Brain Cramp for SF" position

Post by chrisw » Thu Nov 29, 2018 7:53 pm

lech wrote:
Thu Nov 29, 2018 6:22 pm
chrisw wrote:
Wed Nov 28, 2018 10:17 pm
Dann Corbit wrote:
Wed Nov 28, 2018 9:39 pm

SF says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0  
65   +0.00   04:09   3068M  Ng5+ Kh8 Nxf7+ Kh7 d4 exd4 Ng5+ Kh8 Nf7+ 
Sting 11.2 says:

Code: Select all

Searching: 8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
44  +11.35   04:05   2816M  Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qd4 Kc6 Qxe4+ Kc7 Qf4+ Kc8 Qe5 Kd8 Qb8+ Ke7 Qxb7 Bxd2 Qe4+ Kd8 Kf7 Be1 Qh1 Bg3 Qb7 Bh2 Qb6+ Bc7 Qf6+ Kc8 
Well, at least it is statistical pruning, meaning the case doesn’t arise often enough in real life to matter, as ani rating list kno

RL NN’s statistical beings that they are, possibly won’t kno either. Funny if AB’s and RL-NN’s both will fail to lern tha same stuff.
I hope that authors of THE AI know that such side statistical questions can lead to pruning: man... people... humanity?
Well, I don’t about that, but clearly hard pruning or even not so hard pruning is vulnerable to tail events.

Dann Corbit
Posts: 10186
Joined: Wed Mar 08, 2006 7:57 pm
Location: Redmond, WA USA
Contact:

Re: Another "Brain Cramp for SF" position

Post by Dann Corbit » Thu Nov 29, 2018 9:01 pm

peter wrote:
Thu Nov 29, 2018 8:43 am
Dann Corbit wrote:
Wed Nov 28, 2018 9:39 pm
Very fine one, Dann, where did you find it?
Zugzwang arises not before 5th move, so even switching off nullmove by UCI- option doesn't help quickly, (e.g tried with komodo), yet 2MV mode does the trick as for SF.
I found it in the Rybka Forum. Someone there with the handle dorszcz has been posting interesting chess problems for the last few days.

Here is my current analysis record for that position:
8/1p1pNpbk/1q1P4/pP2p2K/P3N3/4P1P1/3P4/8 w - - acd 66; acs 1275; am Ng5+; bm Nc8; c0 "http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=32840"; c3 "Nc8"; ce 1568; pm Nc8; pv Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Bf8 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg6 Kc7 Qxe4 Kb6 Qc4 d6 d4 Ka7 e4 Ka8 Kf6 Ba3 Qg8+ Ka7 Qd5 b6 Qc6 Bb4 Qc7+ Ka8 Qc8+ Ka7 Qc6;
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.

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