Author: José Carlos
Date: 02:44:28 09/08/01
Go up one level in this thread
On September 08, 2001 at 04:37:19, Uri Blass wrote:
>On September 07, 2001 at 17:19:07, José Carlos wrote:
>
>> Last night, in one of my test games, Averno played ...Bxf4 in this position
>>(against another program):
>>
>>[D]4R3/p2r3r/1pNbRp2/2p2k1p/2P2PpP/PP4P1/K7/8 b - - 0 1
>>
>> The game ended soon:
>>
>>57. gxf4 g3 58. Re2 Rhg7 59. Re1 g2 60. Rg1 Rd2+ 61. Ka1 Rf2
>>62. Ree1 Kxf4 63. a4 Kg3 64. a5 Rc7 65. Nd8 bxa5 66. Kb1 Kxh4 67. Ka1 Kg3
>>68. Kb1 h4 69. Ne6 Rc6 70. Nd8 Rb6 71. Ne6 Rxb3+
>>{White resigns} 0-1
>>
>> 59. Re1 is a blunder, but I wonder if the sac is correct at all. It seems that
>>59. Rg2 is good enough for white (Averno plays Bxf4 by eval, it doesn't see the
>>pawn queening at all in search). Is my passed pawn eval too high here? What do
>>other programs think?
>>
>> Thanks in advance.
>>
>> José C.
>Junior7 on p200MMX
>New position
>4R3/p2r3r/1pNbRp2/2p2k1p/2P2PpP/PP4P1/K7/8 b - - 0 1
>
>Analysis by Junior 7:
>
>1...b5 2.cxb5
> ± (1.04) Depth: 3 00:00:00
>1...a5 2.Re1
> ² (0.60) Depth: 3 00:00:00
>1...a6 2.a4 Bc7 3.Re2 Rd1
> ² (0.58) Depth: 3 00:00:00
> ² (0.53) Depth: 9 00:00:00 13kN
>1...Bxf4 2.gxf4 Rd2+ 3.Kb1 g3 4.Re1 Kxf4 5.Ne7 Kg4 6.Ng8 Rf2 7.R8e6 Kxh4 8.Nxf6
>Rf7
> ² (0.33) Depth: 9 00:00:00 44kN
> = (-0.02) Depth: 15 00:01:01 8139kN
>
>Junior7 is not known as a program that overestimate passed pawn
>and I have a position in my correspondence game when I have 3 passed pawns for a
>piece
>and Junior7 is relatively not optimistic(it says similiar scores to Crafty of
>equality when Deep Fritz says 1 pawn advantage for me)
>
>I think that the important point here is the fact that the passed pawns are
>supported by the king.
>
>You can look at the game shredder-Junior from the last WMCCC when shredder
>evaluated it's position as +5 and lost the game.
>
>If your program also evaluates the positions from this game as more than +5 then
>your program is too optimistic about passed pawns.
>
>Here is one of the relevant positions with some small analysis of
>shredder5.32(p200)
>
>
>
>Deep Junior 7 - Shredder
>[D]1r5k/7p/2q2P2/6P1/p2p1N1K/2b1pBP1/8/3Q4 b - - 0 1
>
>Analysis by Shredder 5.32:
>
>63...d3 64.Bxc6
> +- (2.89) Depth: 1/2 00:00:00
> +- (5.25) Depth: 1/2 00:00:00
>63...Qd7 64.Bd5 Re8
> -+ (-4.41) Depth: 1/2 00:00:00
> -+ (-5.79) Depth: 3/6 00:00:00
>63...Qb5 64.Bd5 Re8
> -+ (-5.80) Depth: 3/6 00:00:00
> -+ (-6.00) Depth: 3/6 00:00:00
>63...Qa6 64.Be2 Qa7 65.Kg4
> -+ (-6.03) Depth: 3/6 00:00:00
> -+ (-6.28) Depth: 4/8 00:00:00
>63...Qd7 64.Bd5 a3 65.g4 Re8 66.Kg3
> -+ (-6.29) Depth: 4/8 00:00:00
> -+ (-6.01) Depth: 6/12 00:00:01 23kN
>63...Qa6 64.Bd5 Rb2 65.Kg4 a3 66.Ne6
> -+ (-6.02) Depth: 6/12 00:00:01 27kN
> -+ (-6.13) Depth: 6/12 00:00:02 39kN
>63...Qe8 64.Bd5 a3 65.Qf1 Qe5 66.Qa6 Bb2
> -+ (-6.14) Depth: 6/12 00:00:02 53kN
> -+ (-5.92) Depth: 7/14 00:00:03 84kN
>
>
>Uri
Here's Averno's thinking in that position:
Averno v0.33 alfa
(c) 1999-2001 Jose Carlos Martinez Galan
go
Tiempo esperado: 142857142.842857
Prof Eval Tiempo Nodos PV
---- ---- ------ --------- ------
1 -1.79 0.00 46 c6f3
1 -1.53 0.00 65 ++ e3e2
1 -0.03 0.00 73 ++ e3e2
1 2.78 0.00 109 e3e2
1 3.04 0.00 138 ++ c6c4
1 4.54 0.01 142 ++ c6c4
1 4.68 0.01 146 c6c4
1 4.80 0.01 176 ++ c6b5
1 4.80 0.01 176 c6b5
1 4.80 0.01 197--c6b5
2 4.44 0.01 300 c6b5 f6f7
2 4.55 0.01 400 ++ c6c4
2 4.55 0.01 400 c6c4 f3e4
2 4.63 0.01 611 ++ c6e8
2 4.63 0.01 611 c6e8 h4h3
2 4.65 0.01 702 ++ c6d7
2 4.65 0.01 702 c6d7 f3e4
2 4.65 0.02 761--c6d7 f3e4
3 4.32 0.02 2197 c6d7 g5g6 a4a3
3 4.58 0.02 2962 ++ c6e8
3 4.75 0.03 3503 ++ c6e8
3 4.75 0.03 3503 c6e8 f4e2 b8b4
3 4.75 0.03 3939--c6e8 f4e2 b8b4
4 4.56 0.03 5071 c6e8 f3h5 e8b5 f6f7
4 4.56 0.05 8201--c6e8 f3h5 e8b5 f6f7
5 4.42 0.06 12277 c6e8 f3h5 e8d7 g5g6 a4a3
5 4.64 0.13 30525 ++ c6a6
5 4.64 0.13 30525 c6a6 f6f7 a4a3 f4e2 a6c4
5 4.64 0.14 33373--c6a6 f6f7 a4a3 f4e2 a6c4
6 4.00 0.36 95473 c6a6 f3e2 a6a5 g5g6 h7g6 f4g6
6 4.19 0.60 153873 ++ c6b5
6 4.19 0.60 153873 c6b5 g5g6 h7g6 f4g6 h8h7 d1c2
6 4.19 0.63 162907--c6b5 g5g6 h7g6 f4g6 h8h7 d1c2
7 3.81 0.91 240532 c6b5 g5g6 h7g6 f4g6 h8h7 f3e4 b8b6
7 3.86 1.08 289861 ++ c6a6
7 3.86 1.09 289861 c6a6 f3e2 a6a5 g5g6 h7g6 f4g6 h8h7
7 4.12 1.37 371110 ++ c6e8
7 4.31 1.47 399353 ++ c6e8
7 4.31 1.47 399353 c6e8 g5g6 h7g6 d1d3 g6g5 h4g5 e8e5
7 4.31 1.68 462454--c6e8 g5g6 h7g6 d1d3 g6g5 h4g5 e8e5
8 2.98 2.69 739000 c6e8 g5g6 h7g6 d1h1 b8b5 f3c6 b5b1 h1b1
8 3.24 2.83 785688 ++ c6a6
8 3.24 4.95 1362932 ++ c6a6
8 3.24 4.95 1362932 c6a6 f3e4 b8b2 d1h5 b2h2 f4h3 a6a7 h4g4
8 3.24 11.13 3033480--c6a6 f3e4 b8b2 d1h5 b2h2 f4h3 a6a7 h4g4
9 3.01 15.52 4150524 c6a6 f3e4 b8b2 d1h5 b2h2 f4h3 h2h3 h4h3 a6e6
9 3.02 16.64 4408336 ++ c6e8
9 3.02 16.64 4408336 c6e8 g5g6 h7g6 d1d3 g6g5 -
9 3.02 28.68 7726456--c6e8 g5g6 h7g6 d1d3 g6g5 -
10 2.98 95.37 26505852 c6e8 g5g6 h7g6 d1h1 b8b5 f3c6 b5b1 h1b1 e8c6 b1g6
10 2.98 137.19 38058607--c6e8 g5g6 h7g6 d1h1 b8b5 f3c6 b5b1 h1b1 e8c6 b1g6
11 3.06 146.46 40743305 c6e8 g5g6 h7g6 d1h1 b8b5 f3c6 e8g8 h4g4 b5h5 f4h5 g8e6
11 3.06 222.09 62298047--c6e8 g5g6 h7g6 d1h1 b8b5 f3c6 e8g8 h4g4 b5h5 f4h5 g8e6
;Mi jugada (26) es: c6e8;
Tiempo restante: 9999999417.33
Totales: Visitados: 165900012 Nulos: 26255037 Cortes Nulos: 14750006
Hash exactos: 359 UBounds: 1128081 LBounds: 10021917 Fallos: 211171225
Hash grabaciones: 44335143 (100%) No grabaciones: 37621425
Extensiones: Jaque: 15470509 Recaptura: 696629 Null: 171640 Podas Futility:
2800347
Cortes Beta: 34326785 Cortes Beta Primera: 30110644 (87%)
Por segundo: Visitados: 285202
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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