A new Unbreakable from Neghina...

Chessqueen · Post by **Chessqueen** » Mon Jul 15, 2019 4:54 am

zullil wrote: ↑Mon Jan 21, 2019 10:50 pm

Dann Corbit wrote: ↑Mon Jan 21, 2019 9:59 pm

Sting diverges on ply 2 but seems happy with the plan. Key move chosen, but the Neghina analysis rejects the ponder move Be2 response.

Code: Select all

Searching: 4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 1  -10.34   00:00      19  Ne3
 2  -10.59   00:00     100  Ne3 Be2
 3  -10.42   00:00     198  Ne3 Be2 Nc4
 4  -10.67   00:00     505  b3 Kf8 Ne3 Be2
 5  -10.42   00:00    1150  b3 Bd1 Nd2 Bc2 Nc4
 6   -8.81   00:00    2326  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2
 7   -8.69   00:00    2844  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 b4 Bc6
 8   -7.72   00:00    5185  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Nxd7 Be2 b3 Bd1
 9   -8.53   00:00   10140  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2 Bd3 Kg3 Be4 b4 Kf8
10   -8.00   00:00   16735  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2 Bf1 Kg3 Bd3 Kf3 Kh7 b4
11   -7.80   00:00   25164  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2 Kh7 Kg3 Be2 b4 Bd3 Kf3
12   -7.72   00:00   38468  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2 Kh7 Kg3 Be2 b4 Bd3 Kf3 Bb5 g3 Qf8 Ke3 Bc6 Nc4
13   -7.64   00:00   57232  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2 Kh7 Kg3 Be2 b4 Bd3 Kf3 Bb5 Kf2 Bc6 Ke3 Bxg2 b5
14   -7.56   00:00   87528  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2 Kh7 Kg3 Bc6 b4 Bb5
15   -7.56   00:00   91395  Nd2 Be2
16   -7.56   00:00  112290  Nd2 Be2 Nf3 Bxb5 Nxh2 gxh2 Kxh2 Kh7 Kg3 Bc6 b4
17   -3.39   00:00  913399  Na5 Kf8 Nc6 Be2 Ne7 Bxb5 b3 Ba6 b4 Bd3 Nc8 Bf1 Nb6 Ba6 b5 Bxb5 Nc8 Qxc8 Nxc8 Ba4 Ba5 Bc6 Nb6 Bb5 Be1 Ke8 Ba5
18   -3.39   00:00  966835  Na5 Be2 Nc6 Bxb5 Ne7+ Kf8
19   -3.43   00:00   1019K  Na5 Be2 Nc6 Bxb5 Ne7+ Kf8 b3 Ba6 b4 Bd3 Nc8 Bf1 Nb6 Bb5 Nc8 Bd3 Nb6
20   -3.43   00:00   1084K  Na5 Be2 Nc6 Bxb5 Ne7+ Kf8 b3 Ba6 b4
21   -3.35   00:00   1355K  Na5 Be2 Nc6 Bxb5 Ne7+ Kf8 b3 Ba6 b4 Bd3 Nc8 Be2 Nb6 Ba6 Bb8 Bd3 Bc7 Be4 Nc8 Bc6
22   -3.35   00:00   1506K  Na5 Be2 Nc6 Bxb5 Ne7+ Kf8 b3 Ba6 b4 Bd3 Nc8 Be2 Nb6 Ba6 Bb8 Bd3 Bc7 Be4 Nc8 Bc6 Nb6 Bb7 Bb8 Be4 Bc7
23   -3.35   00:00   1532K  Na5 Be2 Nc6
24   -3.35   00:00   3093K  Na5 Be2 Nc6 Bd3 Ne7+
25   -3.39   00:00   3572K  Na5 Qf8 Nb7 Be2 Nd8 Bxb5 Nc8 Qe8 Ne7+ Kf8 Nc8
26   -3.35   00:00   3746K  Na5 Be2
27   -2.51   00:01  16678K  Na5 Be2 Nc6 Bxb5 Nd8 Kf8 Nc8 Bc4 Ne7
28   -1.54   00:02  20728K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b4 Qe8 Nc8 Ba4 Ne7+ Kf8 Nc8 Bc2 Ne7 Be4 Nc8 Bd3 Nb6 Bb5 Nc8 Ba4 Na7 Kg8 Nc8 Kh7 Ne7 Bc6 Ba5 Qf8 Bb6 Be4 Ba5 Bd3
29   -1.21   00:03  30646K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Ba6 Na4 Kh7 b4 Bb5 Nc5 Kg8 Nb3 Bc4 Nd4 Ba6
30   -0.97   00:05  55821K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Bc6 Nc5 Bd5 b4 Bc4 Ne4 Qe8 Nc5 Bf1 Nb3 Ba6 Nd4 Bc4 b5 Kg8 b6 Bd5 Nf3 Bb7 Nxh2 gxh2 Kxh2 Be4 Kg3 Bd5 Kf2
31   -0.57   00:06  66665K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Ba6
32   -0.57   00:06  68974K  Na5 Be2 Nc6
33   -0.57   00:08  81134K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3
34   +0.00   00:14 153234K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4 Kg8 b5 Kf8 Bb6 Kg8 Bc7
35   +0.00   00:15 158500K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4 Kg8 b5 Kf8 Bb6 Kg8 Bc7
36   +0.00   00:15 163947K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4 Kg8 b5 Kf8 Bb6 Kg8 Bc7
37   +0.00   00:16 173358K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4 Kg8 b5
38   +0.00   00:17 185383K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4 Kg8 b5 Kf8 Bb6 Kg8 Bc7
39   +0.00   00:19 198666K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3
40   +0.00   00:21 225180K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4 Kg8 b5 Kf8 Bb6 Kg8 Bc7
41   +0.00   00:24 249363K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4 Kg8 b5 Kf8 Bb6 Kg8 Bc7
42   +0.00   00:25 266504K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3
43   +0.00   00:29 307081K  Na5 Be2 Nc6 Bxb5 Nd8 Qf8 b3 Kh7 Na4 Qe8 Nc3 Bc6 b4
44   +2.10   16:11  10705M  Na5 Be2 Nb7 Bc4 Nd8 Bxb5 b3 Qf8 Na4 Qh6 gxh6 g5 Nc3 Ng6 h7+ Kxh7 Nxf7 Bf1 Nxg5+ Kh6 Nf3 Nf4 Nxh2 Bxg2+ Kg1 gxh2+ Kxh2 Bc6 Bb6 Nd3 Bd4 Kg6 Kh3 Kf7 Kg4 Bb7 Na4 Bc6 Kg5 Bd5 Nb6 Bc6 Nc4 Bd5 Nd2
45   +2.30   20:30  13404M  Na5 Be2 Nb7 Bc4 Nd8 Bxb5 b3 Qf8 Na4 Qh6 gxh6 g5 Nc3 Ng6 h7+ Kxh7 Nxf7 Kg8
46   +2.30   22:57  14950M  Na5 Be2 Nb7 Bc4 Nd8 Bxb5 b3 Qf8 Na4 Qh6 gxh6 g5 Nc3 Ng6 h7+ Kxh7 Nxf7 Kg8

Nodes: 19628276874
Nodes/second: 10903907
Best move: Na5
Ponder move: Be2

Well, Cfish-dev also finds Na5, albeit with a score of 0.00. But I doubt it can solve the study. Sting's PV seems odd to me. Qh6?

Sting is the King of problems solving chess puzzles

Vinvin · Post by **Vinvin** » Wed Jul 17, 2019 12:39 am

Chessqueen wrote: ↑Mon Jul 15, 2019 4:54 am