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Subject: Re: ECM.1617 - Nxh7 clearly better

Author: Vincent Diepeveen

Date: 15:40:34 09/24/01

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On September 24, 2001 at 01:49:35, Michel Langeveld wrote:

Nxh7 is clearly better:

00:00 0 0 6 (0) 1 -0.143 Rf1xf7 Rf8xf7 Ng5xf7 Kg8xf7
00:00 0 0 12 (0) 1 -0.102 Ng5xh7 Kg8xh7
00:00 0 0 17 (0) 1 2.636 Rf1-f2
00:00 0 0 19 (0) 1 3.124 Qe2-f3
00:00 0 0 20 (0) 1 3.126 Qe2-f2
00:00 0 0 106 (0) 2 2.043 Qe2-f2 f7-f5
++ e2-f3
00:00 0 0 248 (0) 2 2.051 Qe2-f3 f7-f5
++ e2-c4
00:00 0 0 731 (0) 2 2.260 Qe2-c4 Bd7-e8
++ d4-d5
00:00 0 0 885 (0) 2 2.413 d4-d5 Bd7-g4
++ a4-a5
00:00 0 0 1034 (0) 2 2.701 a4-a5 Qb6-c7
00:00 0 0 2105 (0) 3 3.146 a4-a5 Qb6-c7 Qe2-f2
00:00 0 0 4632 (102) 4 2.295 a4-a5 Qb6-c7 Qe2-a2 Bd7-e8
00:00 0 0 30305 (5471) 5 2.425 a4-a5 Qb6-c7 Qe2-a2 Bd7-e8 Be4-d3
00:01 0 0 114634 (13415) 6 2.180 a4-a5 Qb6-c7 Qe2-a2 Bd7-e8 Be4-d3 Nb8-a6
++ e2-c4
++ e2-f2
00:02 0 0 209298 (36014) 6 2.320 Qe2-f2 f7-f5 Qf2-a2 Kg8-h8 a4-a5 Qb6-c7 Be4-d3

00:07 0 0 718889 (154236) 7 1.913 Qe2-f2 a7-a5 Ra1-b1 f7-f5 e5xf6 Bg7xf6 Qf2-a2
Kg8-h8
++ a4-a5
00:11 0 0 1034765 (204357) 7 2.348 a4-a5 Qb6-d8 Qe2-f2 Bd7-e8 e5-e6 f7-f6 Ng5-f3

00:21 0 0 2051958 (403118) 8 2.308 a4-a5 Qb6-d8 Qe2-f2 Nb8-a6 Be4-d3 Bd7-e8 Bd3-
c4 e7-e6
01:00 0 0 6086264 (776132) 9 2.296 a4-a5 Qb6-d8 Qe2-f2 e7-e6 Qf2-f4 f7-f5 e5xf6
Rf8xf6 Qf4-h4
++ e2-f2
01:20 0 0 8205941 (889111) 9 2.301 Qe2-f2 Bd7-e8 Qf2-h4 h7-h6 Ng5-h3 a7-a5 Qh4xe
7 a5xb4 Qe7xb4 Qb6xb4 c3xb4
03:57 0 0 23944783 (4685193) 10 2.359 Qe2-f2 a7-a5 e5-e6 f7xe6 Qf2-h4 h7-h6 Be4x
g6 Rf8-f6 Rf1xf6 e7xf6 Ng5-h7 a5xb4 Nh7xf6 Kg8-f8
10:59 0 0 67045582 (19419930) 11 2.575 Qe2-f2 Nb8-a6 Be4-d3 Bd7-e8 Bd3-c4 Qb6-d8
 Ng5xf7 Be8xf7 Bc4xf7 Kg8-h8 Qf2-h4 Na6-c7
22:30 0 0 135272571 (36406481) 12 2.995 Qe2-f2 Bd7-e8 Qf2-h4 h7-h6 Ng5-f3 a7-a5
Be3xh6 f7-f6 Ra1-b1 Qb6-c7 Bh6xg7 Kg8xg7
++ g5-h7
25:12 0 0 151503190 (37147754) 12 3.988 Ng5xh7 Kg8xh7 Qe2-h5 Kh7-g8 Be4xg6 f7xg6
 Qh5xg6 Rf8xf1 Ra1xf1 c6-c5 Rf1-f6 Kg8-h8 Rf6xb6 a7xb6 Qg6xb6 c5xd4 Qb6-d8 Kh8-h
7 c3xd4
28:45 0 0 172404675 (38679359) 13 3.988 Ng5xh7 Kg8xh7 Qe2-h5 Kh7-g8 Be4xg6 f7xg6
 Qh5xg6 Rf8xf1 Ra1xf1 c6-c5 Rf1-f6 Kg8-h8 Rf6xb6 a7xb6 Qg6xb6 c5xd4 Qb6-d8 Kh8-h
7

Best regards,
Vincent

>another solution found?
>
>======================================================================
>! ECM.1617 !
>======================================================================
>
>       +---+---+---+---+---+---+---+---+
>    8  | *R| *N|   |   |   | *R| *K|   |
>       +---+---+---+---+---+---+---+---+
>    7  | *P| *P|   | *B| *P| *P| *B| *P|
>       +---+---+---+---+---+---+---+---+
>    6  |   | *Q| *P|   |   |   | *P|   |
>       +---+---+---+---+---+---+---+---+
>    5  |   |   |   |   | P |   | N |   |
>       +---+---+---+---+---+---+---+---+
>    4  | P | P |   | P | B |   |   |   |
>       +---+---+---+---+---+---+---+---+
>    3  |   |   | P |   | B |   |   |   |
>       +---+---+---+---+---+---+---+---+
>    2  |   |   |   |   | Q |   | P | P |
>       +---+---+---+---+---+---+---+---+
>    1  | R |   |   |   |   | R | K |   |
>       +---+---+---+---+---+---+---+---+
>         a   b   c   d   e   f   g   h
>
>solution 1. Nxh7
>              time surplus   0.00  time limit 20:00 (20:00)
>         nss  depth   time  score   variation (1)
>                6->   0.62   1.04   1. Qa2 e6 2. Qf2 f5 3. exf6 Rxf6
>                7     0.76   0.87   1. Qa2 e6 2. Qf2 Qc7 3. Bf4 h6 4. Nf3
>                7     1.74   0.88   1. Qf2 a5 2. Nxf7 axb4 3. cxb4 Qxb4
>                                    4. Bg5
>                7     2.22   1.00   1. Rf2 h6 2. Nf3 a5 3. Qd2 axb4 4.
>                                    cxb4
>                7->   3.19   1.00   1. Rf2 h6 2. Nf3 a5 3. Qd2 axb4 4.
>                                    cxb4
>                8     3.64   0.84   1. Rf2 h6 2. Nf3 a5 3. Qd2 axb4 4.
>                                    cxb4 e6
>                8     6.26   0.93   1. Qf2 Qd8 2. b5 Qe8 3. bxc6 Nxc6 4.
>                                    a5 e6
>                8    10.04   1.04   1. e6 Bxe6 2. Nxe6 fxe6 3. Qg4 Qd8
>                                    4. Qxe6+ Kh8 5. Bf4
>                8->  10.63   1.04   1. e6 Bxe6 2. Nxe6 fxe6 3. Qg4 Qd8
>                                    4. Qxe6+ Kh8 5. Bf4
>                9    11.44   1.24   1. e6 Bxe6 2. Nxe6 fxe6 3. Qg4 Rxf1+
>                                    4. Rxf1 Kh8 5. Qxe6 Qc7
>                9->  14.23   1.24   1. e6 Bxe6 2. Nxe6 fxe6 3. Qg4 Rxf1+
>                                    4. Rxf1 Kh8 5. Qxe6 Qc7
>               10    16.46   1.30   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Kh8
>                                    4. Rxf8+ Bxf8 5. Qxe6 Qd8 6. Rf1 Nd7
>               10->  32.85   1.30   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Kh8
>                                    4. Rxf8+ Bxf8 5. Qxe6 Qd8 6. Rf1 Nd7
>               11    36.91   1.41   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Qc7
>                                    4. Qxe6+ Kh8 5. Rxf8+ Bxf8 6. Rf1 Nd7
>                                    7. Rf7 Rd8
>               11->  57.03   1.41   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Qc7
>                                    4. Qxe6+ Kh8 5. Rxf8+ Bxf8 6. Rf1 Nd7
>                                    7. Rf7 Rd8
>               12     1:08   1.32   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Qd8
>                                    4. Qxe6+ Kh8 5. Rxf8+ Bxf8 6. Rf1 a5
>                                    7. Qf7 Nd7
>               12->   3:44   1.32   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Qd8
>                                    4. Qxe6+ Kh8 5. Rxf8+ Bxf8 6. Rf1 a5
>                                    7. Qf7 Nd7
>               13     4:16   1.54   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Qd8
>                                    4. Qxe6+ Kh8 5. Rxf8+ Bxf8 6. Rf1 Nd7
>                                    7. Rf7 Nf6 8. Qe5
>               13->   6:45   1.54   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Qd8
>                                    4. Qxe6+ Kh8 5. Rxf8+ Bxf8 6. Rf1 Nd7
>                                    7. Rf7 Nf6 8. Qe5
>               14     8:34   1.50   1. e6 Bxe6 2. Nxe6 fxe6 3. Qc4 Qd8
>                                    4. Qxe6+ Kh8 5. Rxf8+ Qxf8 6. Rf1 Bf6
>                                    7. Bg5 Kg7 8. Rf2 Qf7
>              time=20:01  cpu=99%  mat=0  n=517825835  fh=90%  nps=431047
>              ext-> chk=14494777 pp=578838 1rep=1498995 mate=120778
>              predicted=0  nodes=517825835  evals=117491948
>              endgame tablebase-> probes done=0  successful=0
>              hashing-> trans/ref=24%  pawn=9%  used=99%
>----------------------> solution incorrect (162/179).



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