Another "Brain Cramp for SF" position

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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 10:00 pm

Dann Corbit wrote:
Thu Nov 29, 2018 9:01 pm
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;
Just to mention finally: MateFinder with Contempt 100 solves the original position in a few minutes in single variant mode too, so does Deep Junior 13.3 with max. contempt and with this it's even able to get it in Marek's refinement:


Analysis by Deep Junior 13.3:

Code: Select all

1.Rc5 
  +-  (2.40)   Depth: 9   00:00:00  9kN
...
1.Rc5 Ng6 2.Nd5 Qd8 3.b6 Kh8 4.Kg4 Qe8 5.Ne7 Nxe7 6.dxe7 Qxe7 7.Kf3 Qe6 8.Rh5+ Kg8 9.Rxa5 Qxb6 10.Rc5 
  +/=  (0.58)   Depth: 25   00:00:53  1087MN
1.Rxe5 fxe5 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ 
  +/-  (1.24)   Depth: 25   00:01:10  1396MN
1.Rxe5 
  +-  (1.66)   Depth: 26   00:01:24  1722MN
1.Rxe5 fxe5 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ Kf8 5.Nh7+ Ke8 6.Nd5 Qb8 7.Nc7+ Kd8 8.b6 f5 
  +-  (1.66)   Depth: 27   00:01:38  1951MN
1.Rxe5 
  +-  (2.08)   Depth: 28   00:02:23  2874MN
1.Rxe5 fxe5 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ Kf8 5.Nh7+ Ke8 6.Nd5 Qb8 7.Nc7+ Kd8 8.b6 f5 9.Kg6 f4 10.gxf4 
  +-  (2.98)   Depth: 28   00:02:29  2964MN
1.Rxe5 fxe5 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ Kf8 5.Nh7+ Ke8 6.Nd5 Qb8 7.Nc7+ Kd8 8.b6 f5 9.Kg6 f4 10.gxf4 
  +-  (2.98)   Depth: 29   00:04:13  5302MN
Peter.

MikeB
Posts: 3541
Joined: Thu Mar 09, 2006 5:34 am
Location: Pen Argyl, Pennsylvania

Re: Another "Brain Cramp for SF" position

Post by MikeB » Thu Nov 29, 2018 11:28 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 
dev-McCain 10 X
settings tactical 2
check option No_Null_Moves
contempt 300

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 31	+8.51 	2.85G	1:57.09	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Be5 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Bb8 g6 Bxd6 g7 Bb4 g8=Q+ Kc7 Qd5 Kc8 Kg4 Kd8 Kg3 Kc8 Qxe4 Bd6+ Kg2 
 30	+7.59 	1.95G	1:19.90	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 Kg7 Nb5 Kh7 Nd6 Kg7 Nxb7 d5 Nxa5 Kf7 
 29	+7.12 	1.52G	1:02.49	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 g4 e4 Ng5 Be5 Nxf7 Bxd6 Nb5 Bc5 Na7+ Qxa7 bxa7 Bxa7 Nd6+ Kd8 g5 Ke7 Nc8+ Kf8 Nxa7 Kg7 Nb5 Kh7 Nd6 Kg7 Nxb7 
 28	+6.16 	1.13G	0:46.50	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qc8 Nc7+ Kd8 b6 Qb8 Ng5 f6 Nf7+ Kc8 Kg6 Bf8 Kxf6 Qxc7 dxc7 Bc5 g4 Bxb6 g5 Bc5 g6 Bf8 Nxe5 
 27	+2.65 	744.1M	0:30.42	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f5 Kg6 Bf8 Nf7 f4 gxf4 exf4 exf4 Qxc7 dxc7 Bc5 f5 Bxb6 Nd6+ Kxc7 Nc4 Bc5 Nxa5 Bb4 Nb3 Kd6 f6 Kd5 f7 Bf8 Kf6 Bb4 Nc1 
 26	+2.55 	567.3M	0:23.07	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f5 Kg6 Bf8 Nf7 f4 gxf4 exf4 exf4 Qxc7 dxc7 Bc5 f5 Bxb6 Nd6+ Kxc7 Nc4 Bc5 Nxa5 Bb4 Nb3 d5 Kg7 Kd6 f6 Ke6 
 25	+2.08 	358.8M	0:14.51	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f5 Kg6 Bf8 Nf7 Qxc7 dxc7 f4 exf4 exf4 gxf4 Bc5 f5 Bxb6 Nd6+ Kxc7 Nc4 Bc5 Nxa5 Bb4 
 24	+1.80 	214.8M	0:08.68	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f5 Kg6 Bf8 Nf7 Qxc7 dxc7 f4 exf4 exf4 gxf4 Bc5 f5 Bxb6 f6 Kxc7 Ne5 Bc5 f7 
 23	+1.43 	166.9M	0:06.68	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 e4 Ng5 Bf6 Nxf7+ Kc8 Kg6 Bb2 Kf5 Bg7 Kxe4 Bb2 g4 Bc1 Nb5 
 22	+0.20 	98.8M  	0:03.98	Nc8 Qd8 Ng5+ Kg8 Ne7+ Kf8 Nh7+ Ke8 Nd5 Qb8 Nc7+ Kd8 b6 Kc8 Ng5 f6 Nf7 f5 Kg6 Bf8 Kxf5 Bg7 Nxe5 
 21	  0.00 	76.7M  	0:03.08	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nh7 Kxh7 Nd5 Qxd6 b6 Qxd5 Kg4 Qxd2 e4 Qc2 Kg5 Qxe4 g4 Qxa4 Kf5 Qb5 Kg5 
 20	  0.00 	71.2M  	0:02.87	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nd5 Qc5 Ne7 
 19	  0.00 	47.7M  	0:01.93	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Kg6 Qxd6+ Ne6 dxe6 g4 Qxe7 e4 Bf8 Kh5 
 18	  0.00 	30.3M  	0:01.25	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
 17	  0.00 	21.6M  	0:00.89	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
 16	  0.00 	9.44M  	0:00.39	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Kg6 Qxd6+ Kf7 Qf6+ Ke8 Qxg5 Kxd7 Qxg3 Kd8 
 15	  0.00 	4.09M  	0:00.17	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
 14	  0.00 	2.67M  	0:00.11	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Kg4 Bf8 Nf7+ Kh7 Ng5+ 
 13	  0.00 	1.33M  	0:00.06	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf5 Qc5 Kg6 
 12	  0.00 	871349	0:00.04	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Kg6 Qxd6+ Kh5 
 11	  0.00 	479745	0:00.02	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Ng6+ Kg8 Ne7+ 
 10	  0.00 	292063	0:00.02	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Kg4 Bf8 Nf7+ 
  9	  0.00 	98080  	0:00.01	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Kg4 Bf8 Nf7+ 
  8	  0.00 	39435  	0:00.00	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Kg4 Bf8 Nf7+ 
  7	  0.00 	32416  	0:00.00	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
  6	  0.00 	17233  	0:00.00	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
  5	  0.00 	10206  	0:00.00	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 Nf7+ 
  4	  0.00 	6811    	0:00.00	Ng5+ Kh8 Nxf7+ Kh7 Ng5+ Kh8 
  3	+5.14 	3124    	0:00.00	Nd5 Kg8 Nxb6 
  2	+7.48 	1300    	0:00.00	Ng5+ Kh8 Nxf7+ Kh7 Nd5 
  1	 -5.42 	150      	0:00.00	Ng5+ Kh8 

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 » Fri Nov 30, 2018 6:17 am

Hi MIke!
MikeB wrote:
Thu Nov 29, 2018 11:28 pm
dev-McCain 10 X
settings tactical 2
check option No_Null_Moves
contempt 300
No need for more than Tactical 1, there are'nt any real good alternatives to Nc8 and Ng5 anyhow. No Null Moves unchecked, Analysis Contempt neither, but 24 threads of 12x3GHz, 32G hash, slowest of three trials:


Analysis by McCain v10.1:

Code: Select all

1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 4.Nf7+ 
  =  (0.00)   Depth: 7/8   00:00:11  33kN
...
1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 4.Nf7+ 
  =  (0.00)   Depth: 40/7   00:00:16  156MN
1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 f5 8.Kg5 f4 9.gxf4 exf4 10.Kxf4 Bb2 11.d4 Ba3 12.Ke5 Bb4 13.Ng5 Kc8 14.Nf7 Be1 15.Nb5 Bg3+ 16.Ke4 Qa8 17.Na7+ Kb8 18.Ne5 Bxe5 19.Kxe5 Qxa7 20.bxa7+ Kxa7 21.Kf6 b5 22.Ke7 bxa4 23.Kxd7 a3 24.Ke6 a2 25.d7 a4 26.d8Q a1Q 27.Qc7+ Ka6 
  +-  (2.45)   Depth: 41/74   00:00:19  232MN
1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 f5 8.Kg5 f4 9.gxf4 exf4 10.Kxf4 Bb2 11.d4 Ba3 12.Ke5 Bb4 13.Ng5 Kc8 14.Nf7 Be1 15.Nb5 Bg3+ 16.Ke4 Qa8 17.Na7+ Kb8 18.Ne5 Bxe5 19.Kxe5 Qxa7 20.bxa7+ Kxa7 21.Kf6 b5 22.Ke7 bxa4 23.Kxd7 a3 24.Ke6 a2 25.d7 a4 26.d8Q a1Q 27.Qc7+ Ka6 
  +-  (2.45)   Depth: 41/74   00:00:19  240MN
1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 f5 8.Kg6 f4 9.Kxg7 fxg3 10.Ng5 g2 11.Nh3 Qc8 12.Ng1 Qb8 13.Kg6 e4 14.Kf6 Qc8 15.Kf7 Qb8 16.Kg6 Kc8 17.Kf5 Kd8 18.Ke5 Qc8 19.Kxe4 Qb8 20.Kf4 Qc8 21.Nf3 Qb8 22.Kg3 Kc8 23.Kxg2 Kd8 24.Kg3 Qc8 
  +-  (6.74)   Depth: 42/63   00:00:32  616MN
...
1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 Kc8 8.g4 e4 9.Ng5 Be5 10.Nxf7 Bxd6 11.Nb5 Bc5 12.Na7+ Qxa7 13.bxa7 Bxa7 14.Nd6+ Kb8 15.g5 Ka8 16.g6 Bc5 17.g7 Bxd6 18.g8Q+ Ka7 19.Qd5 Bg3 20.Kg6 d6 21.Qc4 b6 22.Kf7 b5 23.Qxb5 Be1 24.Qd5 Kb8 25.Qxd6+ Kc8 26.Qc6+ Kb8 27.Qb5+ Kc7 
  +-  (11.04)   Depth: 43/64   00:01:27  2327MN
1.Nc8 Qd8 2.Ng5+ Kg8 3.Ne7+ Kf8 4.Nh7+ Ke8 5.Nd5 Qb8 6.Nc7+ Kd8 7.b6 e4 8.Ng5 Kc8 9.Nxf7 Bf8 10.g4 Bxd6 11.Nb5 Bc5 12.Na7+ Qxa7 13.bxa7 Bxa7 14.Nd6+ Kd8 15.g5 Bb6 16.g6 Bc7 17.g7 Ke7 18.g8Q Kxd6 19.Qg6+ Kd5 20.Qf7+ Kd6 21.Qf6+ Kc5 22.Qd4+ Kc6 23.Qc4+ Kb6 24.Qxe4 Ka7 25.Kg6 d6 26.Qd5 Kb8 27.Kf7 Kc8 28.Qe4 Bb6 29.Qe8+ Kc7 30.Qe7+ Kc6 31.Qe4+ d5 32.Qe8+ Kc7 33.Qe5+ Kc8 
  +-  (19.94)   Depth: 44/71   00:11:51  23090MN
 
Contempt 300 (not possible as UCI- option of 10.1, so I can't check) could help to solve even without MV, did you try that?
If it works, Mareks variation of the position could be solvable for dev-McCain too maybe.
Peter.

User avatar
M ANSARI
Posts: 3411
Joined: Thu Mar 16, 2006 6:10 pm

Re: Another "Brain Cramp for SF" position

Post by M ANSARI » Fri Nov 30, 2018 9:09 am

Wow ... what a nice position! If a Super GM is going to beat a top chess engine it will be a position like this. All the human has to see is that there is no risk in avoiding the obvious N check and going for a perpetual and playing Nc8!!!. After that it is fairly obvious that the king can be forced to block the queen escape routes and b6 just entombs the black queen. Once that is done black is totally helpless and has no play. A very nice position that unlike many setup puzzles is something that I can see happening in an actual game.

zullil
Posts: 5680
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Another "Brain Cramp for SF" position

Post by zullil » Fri Nov 30, 2018 10:12 am

Dann Corbit wrote:
Wed Nov 28, 2018 9:39 pm
Stockfish-dev solves this without trickery. Just not very fast!

info depth 72 seldepth 11 multipv 1 score cp 0 nodes 25428637574 nps 47108476 hashfull 999 tbhits 0 time 539789 pv e4g5 h7h8 g5f7 h8h7 f7g5 h7h8 g5f7
info depth 73 currmove e4g5 currmovenumber 1
info depth 73 currmove e7f5 currmovenumber 2
info depth 73 currmove h5g4 currmovenumber 3
info depth 73 currmove d2d3 currmovenumber 4
info depth 73 currmove e7d5 currmovenumber 5
info depth 73 currmove h5h4 currmovenumber 6
info depth 73 currmove e7g6 currmovenumber 7
info depth 73 currmove e4c5 currmovenumber 8
info depth 73 currmove e4c3 currmovenumber 9
info depth 73 currmove g3g4 currmovenumber 10
info depth 73 currmove e4f6 currmovenumber 11
info depth 73 currmove e7c8 currmovenumber 12
info depth 73 seldepth 33 multipv 1 score cp 10 lowerbound nodes 77634336845 nps 48198261 hashfull 999 tbhits 0 time 1610729 pv e7c8
info depth 72 currmove e7c8 currmovenumber 1
info depth 73 seldepth 83 multipv 1 score cp 19 lowerbound nodes 80768134889 nps 48195123 hashfull 999 tbhits 0 time 1675857 pv e7c8
info depth 71 currmove e7c8 currmovenumber 1
info depth 73 seldepth 83 multipv 1 score cp 34 lowerbound nodes 83069341404 nps 48121743 hashfull 999 tbhits 0 time 1726233 pv e7c8
info depth 70 currmove e7c8 currmovenumber 1
info depth 73 seldepth 83 multipv 1 score cp 54 lowerbound nodes 86917519446 nps 48152176 hashfull 999 tbhits 0 time 1805059 pv e7c8
info depth 69 currmove e7c8 currmovenumber 1
info depth 73 seldepth 83 multipv 1 score cp 81 lowerbound nodes 88821798726 nps 48190060 hashfull 999 tbhits 0 time 1843156 pv e7c8
info depth 68 currmove e7c8 currmovenumber 1
info depth 73 seldepth 83 multipv 1 score cp 118 lowerbound nodes 90827377382 nps 48232466 hashfull 999 tbhits 0 time 1883117 pv e7c8
info depth 67 currmove e7c8 currmovenumber 1
info depth 73 seldepth 83 multipv 1 score cp 166 lowerbound nodes 92687229663 nps 48256979 hashfull 999 tbhits 0 time 1920701 pv e7c8

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 » Fri Nov 30, 2018 7:18 pm

Hi Louis!
zullil wrote:
Fri Nov 30, 2018 10:12 am
Stockfish-dev solves this without trickery. Just not very fast!
But does it solve Marek's variation of the position too?

Here*s Rober Flesher's Aggressor Dissident -setting of Zappa (solving the study- position itself in about 3 minutes, btw. has anybody found out the author?):

Analysis by Zappa Mexico II x64AD:

Code: Select all

1.Rxe5 fxe5 2.Ng5+ Kh8 3.Nxf7+ Kh7 4.Ng5+ Kh8 5.Nf7+ 
  =  (0.00)   Depth: 18/46   00:00:15  3590kN
...
1.Rxe5 fxe5 2.Ng5+ Kh8 3.Nxf7+ Kh7 4.Ng5+ Kh8 5.Nf7+ 
  =  (0.00)   Depth: 31/81   00:27:43  25028MN
1.Rxe5 fxe5 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ Kf8 5.Nh7+ Ke8 6.Nd5 Qb8 7.Nc7+ Kd8 8.b6 Kc8 9.Ng5 f5 10.Kg6 Bf8 11.Nf7 Qxc7 12.dxc7 f4 13.gxf4 exf4 14.exf4 Bc5 15.f5 Bxb6 16.Nd6+ Kxc7 17.Nc4 Bd4 18.Nxa5 
  +/-  (1.38)   Depth: 32/83   00:41:37  36746MN
1.Rxe5 fxe5 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ Kf8 5.Nh7+ Ke8 6.Nd5 Qb8 7.Nc7+ Kd8 8.b6 Kc8 9.Ng5 f5 10.Kg6 Bf8 11.Nf7 Qxc7 12.dxc7 f4 13.gxf4 exf4 14.exf4 Bc5 15.f5 Bxb6 16.Nd6+ Kxc7 17.Nc4 Bd4 18.Nxa5 
  +/-  (1.38)   Depth: 32/83   00:49:38  43253MN
1.Rxe5 fxe5 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ Kf8 5.Nh7+ Ke8 6.Nd5 Qb8 7.Nc7+ Kd8 8.b6 Kc8 9.Ng5 f5 10.Kg6 Bf8 11.Nf7 Qxc7 12.dxc7 f4 13.gxf4 exf4 14.exf4 Bc5 15.f5 Bxb6 16.Nd6+ Kxc7 17.Nb5+ Kc6 18.f6 Kd5 
  +-  (1.89)   Depth: 33/85   01:18:38  64151MN
Peter.

Arpad Rusz
Posts: 270
Joined: Sat Apr 17, 2010 12:34 pm
Location: Budapest

Re: Another "Brain Cramp for SF" position

Post by Arpad Rusz » Fri Nov 30, 2018 8:14 pm

The author is A. Kazantsev.

[pgn][Event "1.hm Shakhmaty v SSSR#26 @3"]
[Site "?"]
[Date "1959.??.??"]
[Round "?"]
[White "Kazantsev=A"]
[Black "(+3032.65h5h7)"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/1p1pNpbk/q2P4/p3p2K/PP2N3/4P1P1/3P4/8 w - - 0 1"]
[PlyCount "37"]
[EventDate "1959.??.??"]

{HHdbV#52660} 1. b5 Qb6 (1... Qa7 2. Ng5+ Kh8 3. Nxf7+ Kh7 4. Ng5+ Kh8 5. Kg6)
2. Nc8 $1 Qd8 3. Ng5+ Kg8 4. Ne7+ Kf8 5. Nh7+ Ke8 6. Nd5 $1 Qc8 (6... f6 7. Kg6
) (6... Qb8 7. Nc7+ Kd8 8. b6 e4 9. Ng5 Bf8 10. Nxf7+ Kc8 11. Nb5) (6... f5 $1
{<cook MG>} 7. Kg6 Qb8 8. Nc7+ Kd8 9. b6 f4 10. gxf4 exf4 11. Ng5 f3) 7. Nc7+
Kd8 8. Ng5 Qb8 9. Nxf7+ Kc8 10. b6 e4 11. Nb5 Qa8 12. Na7+ Kb8 13. Kg6 Bb2 14.
Kf5 Ba3 15. Ne5 Qxa7 16. Nxd7+ Ka8 17. bxa7 Bxd6 18. Nb6+ Kxa7 19. Nc8+ 1-0

[/pgn]

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 » Fri Nov 30, 2018 9:33 pm

Arpad Rusz wrote:
Fri Nov 30, 2018 8:14 pm
The author is A. Kazantsev.

Thank you, Árpád!
I knew it would have an other one starting position, or I would have found it already.

In a way I really dislike this kind of dismembering someone's work without giving at least credit to the original sources, just to have one more "test position" for engines to "publicise".

Still and even more we have Sting only to solve it quickly with correct continuation in output- line and winning eval, except some wild settings of engines or much hardware- time to be used.

Only disadvantage as for engine- testing of the original starting position is, you cannot take it as to be solved by first move "found" or not found only, because the correct reasons of solving has to be checked in output- line longer than one ply.

That's why I don't like single best move test- suites for judging "overall playing strength" by itself so much neither. Measured in Elo or whatever, "overall playing strength" is a fake by itself always anyhow.

Playing strength of humans and of engines is always position- dependent, and as such it can be tested always only.
Peter.

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 » Fri Nov 30, 2018 11:23 pm

peter wrote:
Fri Nov 30, 2018 9:33 pm
or much hardware- time to be used.
That was a lucky run probably, first one before took some longer to get rid of 0.00 with b5 or Ng5.
Won't give it a third try.
Should have given stop-start here also latest after 30', to get an output- line sooner maybe.


Analysis by Cfish 241118 64 POPCNT NUMA:

Code: Select all

1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 
  =  (0.00)   Depth: 7/7   00:00:15  5kN
...
1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 
  =  (0.00)   Depth: 12/7   00:00:15  12kN
1.b5 Qb6 2.Ng5+ Kh8 3.Nxf7+ Kh7 4.Ng5+ Kh8 
  =  (0.00)   Depth: 13/9   00:00:15  17kN
...
1.b5 Qb6 2.Ng5+ Kh8 3.Nxf7+ Kh7 4.Ng5+ Kh8 
  =  (0.00)   Depth: 21/9   00:00:15  94kN
1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 4.Nf7+ 
  =  (0.00)   Depth: 22/11   00:00:15  106kN
...
1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 
  =  (0.00)   Depth: 29/7   00:00:15  993kN
1.b5 Qb6 2.Ng5+ Kh8 3.Nxf7+ Kh7 4.Ng5+ Kh8 
  =  (0.00)   Depth: 30/9   00:00:15  1611kN
...
1.b5 Qb6 2.Ng5+ Kh8 3.Nxf7+ Kh7 4.Ng5+ Kh8 
  =  (0.00)   Depth: 36/9   00:00:15  18006kN
1.Ng5+ Kh8 2.b5 Qb6 3.Nxf7+ Kh7 4.d4 exd4 5.Ng5+ Kh8 6.Nf7+ 
  =  (0.00)   Depth: 37/12   00:00:16  30339kN
...
1.Ng5+ Kh8 2.b5 Qb6 3.Nxf7+ Kh7 4.Ng5+ Kh8 
  =  (0.00)   Depth: 60/9   00:01:13  1701MN
1.b5 Qb6 2.Ng5+ Kh8 3.Nxf7+ Kh7 4.d4 exd4 5.Ng5+ Kh8 6.Nf7+ 
  =  (0.00)   Depth: 61/13   00:02:12  3441MN
1.Ng5+ Kh8 2.Nxf7+ Kh7 3.b5 Qb6 4.d4 exd4 5.Ng5+ Kh8 6.Nf7+ 
  =  (0.00)   Depth: 62/12   00:04:05  6661MN
...
1.Ng5+ Kh8 2.Nxf7+ Kh7 3.Ng5+ Kh8 
  =  (0.00)   Depth: 68/11   00:05:18  8814MN
1.b5 
  =  (0.10 ++)   Depth: 69/79   00:09:01  15501MN
1.b5 
  =  (0.19 ++)   Depth: 69/82   00:09:11  15803MN
1.b5 
  +/=  (0.34 ++)   Depth: 69/82   00:09:26  16248MN
1.b5 
  +/=  (0.54 ++)   Depth: 69/82   00:09:32  16438MN
1.b5 
  +/-  (0.81 ++)   Depth: 69/82   00:10:17  17855MN
1.b5 
  +/-  (1.18 ++)   Depth: 69/82   00:11:00  19195MN
1.b5 
  +-  (1.66 ++)   Depth: 69/82   00:11:46  20701MN
1.b5 
  +-  (2.28 ++)   Depth: 69/82   00:13:03  23407MN
1.b5 
  +-  (3.09 ++)   Depth: 69/82   00:15:56  31522MN
1.b5 
  +-  (4.11 ++)   Depth: 69/82   00:25:16  61836MN
1.b5 
  +-  (5.41 ++)   Depth: 69/82   00:27:24  67445MN
1.b5 
  +-  (7.06 ++)   Depth: 69/82   00:30:15  73367MN
1.b5 
  +-  (9.14 ++)   Depth: 69/82   00:33:46  80258MN
1.b5 
  +-  (11.77 ++)   Depth: 69/94   00:39:41  92109MN
1.b5 
  +-  (15.07 ++)   Depth: 69/94   00:49:18  112270MN
1.b5 Qb6 2.Nc8 Qd8 3.Ng5+ Kg8 4.Ne7+ Kf8 5.Nh7+ Ke8 6.Nd5 Qb8 7.Nc7+ Kd8 8.b6 f5 9.Kg6 f4 10.Kxg7 fxg3 11.Ng5 Kc8 12.Nh3 Kd8 13.Kf6 e4 14.Kg7 g2 15.Ng1 Qc8 16.Kf6 Qb8 17.Ne2 Qc8 18.Ke5 Qb8 19.Kxe4 Qc8 20.Ng1 Qb8 21.Kd5 Kc8 22.Ne2 Kd8 23.Ke5 Qc8 24.Ng1 Qb8 25.Kf6 Qc8 26.Kf5 Qb8 27.Ne2 Kc8 28.Ke4 Kd8 29.Kf3 Qc8 30.Kxg2 Qb8 31.Kf3 Qc8 32.Ke4 Qb8 33.Kf5 Qc8 34.Nc3 Qb8 35.Kf6 
  +-  (15.07)   Depth: 69/94   00:55:33  127113MN
Peter.

zullil
Posts: 5680
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Another "Brain Cramp for SF" position

Post by zullil » Sat Dec 01, 2018 10:20 am

peter wrote:
Fri Nov 30, 2018 7:18 pm
Hi Louis!
zullil wrote:
Fri Nov 30, 2018 10:12 am
Stockfish-dev solves this without trickery. Just not very fast!
But does it solve Marek's variation of the position too?
Hi Peter,

Yes, it seems to, although so far we don't see the second move for White.



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