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Subject: Re: ECM.1354

Author: Uri Blass

Date: 03:59:42 09/24/01

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On September 24, 2001 at 01:41:30, Michel Langeveld wrote:

>a3 seems to be also a very good move
>
>======================================================================
>! ECM.1354 !
>======================================================================
>
>       +---+---+---+---+---+---+---+---+
>    8  | *R|   |   | *Q|   | *R| *K|   |
>       +---+---+---+---+---+---+---+---+
>    7  | *P|   |   |   |   |   | *P| *P|
>       +---+---+---+---+---+---+---+---+
>    6  | *B| *N|   | *P|   | *P|   |   |
>       +---+---+---+---+---+---+---+---+
>    5  |   |   | *P| P |   |   |   |   |
>       +---+---+---+---+---+---+---+---+
>    4  |   | *B| P |   | N | P |   |   |
>       +---+---+---+---+---+---+---+---+
>    3  |   |   |   | B |   | R |   |   |
>       +---+---+---+---+---+---+---+---+
>    2  | P | B | Q |   |   |   | P | P |
>       +---+---+---+---+---+---+---+---+
>    1  | R |   |   |   |   |   | K |   |
>       +---+---+---+---+---+---+---+---+
>         a   b   c   d   e   f   g   h
>
>solution 1. Ng5
>              time surplus   0.00  time limit 20:00 (20:00)
>         nss  depth   time  score   variation (1)
>                7     0.33   0.56   1. Ng3 Kh8 2. a3 Ba5 3. Re3 Re8 4.
>                                    Rxe8+ Qxe8 5. Rb1
>                7->   0.71   0.56   1. Ng3 Kh8 2. a3 Ba5 3. Re3 Re8 4.
>                                    Rxe8+ Qxe8 5. Rb1
>                8     0.88   0.42   1. Ng3 Kh8 2. a3 Ba5 3. Re3 Re8 4.
>                                    Nf5 Rxe3 5. Nxe3
>                8     1.54   0.47   1. Nf2 Kh8 2. Rh3 h6 3. Rb1 Re8 4.
>                                    Bg6 Re7
>                8->   4.18   0.47   1. Nf2 Kh8 2. Rh3 h6 3. Rb1 Re8 4.
>                                    Bg6 Re7
>                9     5.11   0.45   1. Nf2 h6 2. a3 Ba5 3. Re3 Re8 4. Re6
>                                    Rb8 5. Rb1
>                9     9.28   0.52   1. Rh3 h6 2. a3 Ba5 3. Rb1 Rb8 4. Re3
>                                    Re8 5. Qe2
>                9    14.25   0.54   1. Re3 Rb8 2. Ng3 Re8 3. Re6 Kf8 4.
>                                    Nf5 Nc8 5. Rb1
>                9->  15.43   0.54   1. Re3 Rb8 2. Ng3 Re8 3. Re6 Kf8 4.
>                                    Nf5 Nc8 5. Rb1
>               10    31.38   0.48   1. Re3 Qd7 2. Ng3 Kh8 3. a3 Ba5 4.
>                                    Rf1 Rae8 5. Bf5 Qc7 <HT>
>               10    46.82     ++   1. Ng5!!
>               10     1:02   2.45   1. Ng5 h6 2. Ne6 Qd7 3. Nxf8 Rxf8 4.
>                                    a3 Ba5 5. Bh7+ Kh8 6. Bf5
>               10->   1:03   2.45   1. Ng5 h6 2. Ne6 Qd7 3. Nxf8 Rxf8 4.
>                                    a3 Ba5 5. Bh7+ Kh8 6. Bf5
>               11     1:14   2.45   1. Ng5 h6 2. Ne6 Qc8 3. Nxf8 Qxf8 4.
>                                    a3 Ba5 5. Re3 Re8 6. Re6
>               11->   1:19   2.45   1. Ng5 h6 2. Ne6 Qc8 3. Nxf8 Qxf8 4.
>                                    a3 Ba5 5. Re3 Re8 6. Re6
>               12     2:07     ++   1. Ng5!!
>               12     5:37   3.08   1. a3 Ba5 2. Ng5 Re8 3. Bxh7+ Kf8 4.
>                                    Bg6 Nxc4 5. Rh3 Qb6 6. Rh8+ Ke7 7.
>                                    Rxe8+ Rxe8 8. Qe4+ Ne5 9. Bxe5 dxe5
>                                    10. Bxe8 Kxe8
>               12->   5:44   3.08   1. a3 Ba5 2. Ng5 Re8 3. Bxh7+ Kf8 4.
>                                    Bg6 Nxc4 5. Rh3 Qb6 6. Rh8+ Ke7 7.
>                                    Rxe8+ Rxe8 8. Qe4+ Ne5 9. Bxe5 dxe5
>                                    10. Bxe8 Kxe8
>               13     6:18   3.37   1. a3 Ba5 2. Ng5 Re8 3. Bxh7+ Kf8 4.
>                                    Bg6 Nxc4 5. Bxe8 Qxe8 6. Ne6+ Kg8 7.
>                                    Rg3 Kh8 8. Rxg7 Nxb2 9. Qxb2
>               13->   6:56   3.37   1. a3 Ba5 2. Ng5 Re8 3. Bxh7+ Kf8 4.
>                                    Bg6 Nxc4 5. Bxe8 Qxe8 6. Ne6+ Kg8 7.
>                                    Rg3 Kh8 8. Rxg7 Nxb2 9. Qxb2
>               14     8:47     --   1. a3
>               14     9:35   3.05   1. a3 Ba5 2. Ng5 h6 3. Bh7+ Kh8 4.
>                                    Rh3 Nxc4 5. Bg8 f5 6. Bf7 Qxg5 7. fxg5
>                                    Rxf7 8. gxh6 Nxb2 9. hxg7+ Kg8 10.
>                                    Qxb2 Rxg7


Crafty can see a bigger score for white after 1.Ng5 at depthes 10,11 so I do not
understand the fact that it could not find 1.Ng5 at depth 13 based on the
analysis

I also do not understand the +2.45 score at depthes 10,11 because my Crafty18.10
can find signidicantly bigger score at these depthes in the root position

New position
[D]r2q1rk1/p5pp/bn1p1p2/2pP2N1/1bP2P2/3B1R2/PBQ3PP/R5K1 b - - 0 1

Analysis by Crafty 18.10:

1...fxg5 2.Bxh7+
  -+  (-2.21)   Depth: 1/10   00:00:00
1...fxg5 2.Bxh7+ Kh8
  -+  (-2.11)   Depth: 2/10   00:00:00
1...fxg5 2.Bxh7+ Kh8 3.a3
  -+  (-2.08)   Depth: 3/10   00:00:00
1...fxg5 2.a3 Ba5 3.Bxh7+ Kh8
  -+  (-1.99)   Depth: 4/11   00:00:00
1...fxg5 2.a3 Ba5 3.Bxh7+ Kh8 4.Qg6 Nxc4 5.Bxg7#
  -+  (-2.01)   Depth: 5/19   00:00:00
1...fxg5 2.Bxh7+ Kh8 3.Qg6 Qe7 4.Qh6 Rxf4 5.Bf5+ Kg8 6.Be6+ Kf8 7.Rxf4+ gxf4
8.Qxf4+
  -+  (-1.77)   Depth: 6/19   00:00:00  58kN
1...fxg5 2.Bxh7+ Kh8 3.Rh3 Rf6 4.a3 Ba5 5.Bxf6 Qxf6
  ³  (-0.34)   Depth: 7/20   00:00:01  333kN
1...fxg5 2.Bxh7+ Kh8 3.Rh3 Bc3 4.Bf5+ Kg8 5.Be6+ Rf7 6.Bxc3 Nxc4
  +-  (4.04)   Depth: 8/25   00:00:03  1181kN
1...Re8
  +-  (3.64)   Depth: 8/25   00:00:03  1498kN
1...Re8 2.Bxh7+ Kf8 3.Ne6+ Rxe6 4.dxe6 Nxc4 5.a3 Bd2 6.Be4
  +-  (3.50)   Depth: 8/25   00:00:05  2022kN
1...h6
  +-  (3.10)   Depth: 8/25   00:00:06  2711kN
1...h6 2.Ne6 Qe7 3.Rg3 Rf7 4.Bh7+ Kh8 5.Bg6 Rff8 6.Nxf8 Rxf8
  +-  (2.83)   Depth: 8/25   00:00:07  2874kN
1...h6 2.Bh7+ Kh8 3.Bg8 f5 4.Bf7 Nxc4 5.Qxf5 Qxg5 6.fxg5 Nxb2 7.gxh6 gxh6
  +-  (4.82)   Depth: 9/28   00:00:12  4993kN
1...Re8
  +-  (4.42)   Depth: 9/28   00:00:12  5398kN
1...Re8 2.Bxh7+ Kf8 3.Ne6+ Rxe6 4.dxe6 Bxc4 5.a3 Ba5 6.Qf5 Qe7
  +-  (3.14)   Depth: 9/28   00:00:17  7630kN
1...Re8 2.Bxh7+ Kf8 3.Bg6 Nxc4 4.Bxe8 Qxe8 5.Ne6+ Kf7 6.Rg3 Qh8 7.Rxg7+ Qxg7
8.Nxg7 Nxb2
  +-  (3.47)   Depth: 10/31   00:00:36  15816kN
1...Re8 2.Bxh7+ Kf8 3.Qg6 Qd7 4.Bxf6 Bxc4 5.Rg3 Nxd5 6.Bxg7+ Ke7 7.Re3+ Kd8
8.Rxe8+ Qxe8 9.Qxd6+ Kc8 10.Ne6
  +-  (5.29)   Depth: 11/31   00:01:30  39760kN
1...g6
  +-  (4.89)   Depth: 11/31   00:03:07  85503kN
1...g6 2.Bxg6 h6 3.Ne6 Qe7 4.Bh5 Kh8 5.Qg6 Nd7 6.Nxf8 Qxf8
  +-  (4.81)   Depth: 11/31   00:03:33  96980kN

(Blass, Tel-aviv 24.09.2001)

New position
[D]r2q1rk1/p5pp/bn1p1p2/2pP4/1bP1NP2/3B1R2/PBQ3PP/R5K1 w - - 0 1

Analysis by Crafty 18.10:

1.Re3
  ²  (0.56)   Depth: 1/8   00:00:00
1.Re3 Re8
  ²  (0.28)   Depth: 2/8   00:00:00
1.Ng3 h6
  ²  (0.42)   Depth: 2/8   00:00:00
1.Ng3 h6 2.Re3
  ²  (0.70)   Depth: 3/8   00:00:00
1.Ng3 h6 2.a3 Ba5
  ²  (0.54)   Depth: 4/10   00:00:00
1.Ng3 h6 2.a3 Ba5 3.Re3
  ±  (0.82)   Depth: 5/18   00:00:00
1.Ng3 Kh8 2.a3 Ba5 3.Re3 Re8
  ²  (0.59)   Depth: 6/18   00:00:00  38kN
1.Ng3 Kh8 2.a3 Ba5 3.Re3 Re8 4.Rxe8+ Qxe8 5.Rb1
  ±  (0.71)   Depth: 7/20   00:00:00  132kN
1.Ng3 Kh8 2.a3 Ba5 3.Re3 Re8 4.Nf5 Rxe3 5.Nxe3
  ²  (0.59)   Depth: 8/26   00:00:01  410kN
1.Rg3 Rb8 2.Nxf6+ Rxf6 3.Bxh7+ Kf8 4.Rxg7 Kxg7 5.Qg6+ Kf8 6.Bxf6
  ²  (0.63)   Depth: 8/26   00:00:04  1642kN
1.Rg3 Rb8 2.Nf2 Kh8 3.Rh3 h6 4.a3 Ba5 5.Rb1
  ²  (0.66)   Depth: 9/29   00:00:07  2664kN
1.Rb1 Rb8 2.Ng3 Kh8 3.a3 Ba5 4.Re3 Re8 5.Re6
  ²  (0.69)   Depth: 9/29   00:00:11  3872kN
1.Nf2 Kh8 2.a3 Ba5 3.Rh3 h6 4.Re3 Re8 5.Rxe8+ Qxe8 6.Rb1
  ²  (0.70)   Depth: 9/29   00:00:15  5766kN
1.Ng5
  ±  (1.10)   Depth: 9/29   00:00:19  7082kN
1.Ng5 h5 2.Ne6 Qe7 3.Nxf8 Rxf8 4.Rh3 g6 5.Rb1
  +-  (2.52)   Depth: 9/29   00:00:26  10409kN
1.Ng5 h5 2.Ne6 Qe7 3.Nxf8 Rxf8 4.Rh3 g6 5.Rb1
  +-  (2.92)   Depth: 10/31   00:00:39  15608kN
1.Ng5 Re8 2.Ne6 Qe7 3.Rg3 Kh8 4.Rxg7 Qxg7 5.Nxg7 Kxg7 6.Rb1
  +-  (3.21)   Depth: 11/34   00:01:28  36849kN
1.Ng5 Re8 2.Ne6 Qe7 3.Rg3 Kh8 4.Rxg7 Qxg7 5.Nxg7 Kxg7 6.Rb1
  +-  (3.61)   Depth: 12/34   00:03:15  80555kN

(Blass, Tel-aviv 24.09.2001)

Uri



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