Author: Roy Eassa
Date: 11:02:19 09/09/02
Go up one level in this thread
On September 09, 2002 at 11:14:55, Robert Hyatt wrote:
>On September 08, 2002 at 20:39:42, Brian Richardson wrote:
>
>>Tinker's static evaluation is -.24, which is good for black, despite
>>being a pawn down.
>>
>>Tinker's eval is asymmetric, especially some king safety terms, so
>>as it happens, the static eval if white is set on move is -1.31 (better for
>>black).
>>
>>This is also one of those positions where the score bounces around a lot
>>between odd and even plys:
>>ply score
>>6 0.21
>>7 0.87
>>8 0.50
>>9 1.22
>>10 0.60
>>11 1.17
>>(all favoring black).
>
>
>Mine gets pretty solid by depth=9 and gets worse and worse for white as
>the depth advances:
>
>
> (2) 8-> 5.82 -0.49 1. ... Rd8 2. Qc2 Rxd1+ 3. Qxd1 Nc5
> 4. Ne5 Qe4 5. Rg1 Nd3+ 6. Nxd3 Bxd3
> 9 7.10 -0.45 1. ... Rd8 2. Qc2 Rxd1+ 3. Qxd1 Nc5
> 4. Ne5 Qf5 5. b4 axb4 6. axb4 Nd3+
> 7. Nxd3 Bxd3
> 9 11.39 -0.78 1. ... Re8 2. Rd5 Rac8 3. Nh4 Qf6 4.
> Nf5 Bc4 5. Rxa5 Rcd8
> 9-> 11.67 -0.78 1. ... Re8 2. Rd5 Rac8 3. Nh4 Qf6 4.
> Nf5 Bc4 5. Rxa5 Rcd8
> 10 17.89 -0.74 1. ... Re8 2. Rd4 Rac8 3. a4 Qf5 4.
> Bf4 Qg4 5. Rg1 Qf5 6. Qd1
> 10-> 20.66 -0.74 1. ... Re8 2. Rd4 Rac8 3. a4 Qf5 4.
> Bf4 Qg4 5. Rg1 Qf5 6. Qd1
> 11 39.32 -0.91 1. ... Re8 2. Rd5 Rac8 3. Rg1 Qc6 4.
> Qd1 Bb5 5. Be5 f6 6. Bf4 b6
> 11-> 41.57 -0.91 1. ... Re8 2. Rd5 Rac8 3. Rg1 Qc6 4.
> Qd1 Bb5 5. Be5 f6 6. Bf4 b6
> 12 1:36 -0.96 1. ... Re8 2. Rd4 Rac8 3. a4 b6 4.
> Rg1 Qf5 5. Bf4 f6 6. Nd2 Bb7 7. Qd3
> 12-> 1:43 -0.96 1. ... Re8 2. Rd4 Rac8 3. a4 b6 4.
> Rg1 Qf5 5. Bf4 f6 6. Nd2 Bb7 7. Qd3
> 13 2:50 -1.02 1. ... Re8 2. Rd4 Rac8 3. a4 b6 4.
> Rg1 Qe6 5. Qd1 f6 6. Rd7 Bc4 7. Qd4
> Nxg3 8. hxg3
> 13-> 3:05 -1.02 1. ... Re8 2. Rd4 Rac8 3. a4 b6 4.
> Rg1 Qe6 5. Qd1 f6 6. Rd7 Bc4 7. Qd4
> Nxg3 8. hxg3
>
>This doesn't show black winning any material, so there is roughly -2.0
>positional compensation for black, according to Crafty...
Some analysis from when the position was first posted:
1...Re8 2.Rd4
[2.Rd5 Rac8 3.Rd4 Qf5 4.a4 Nxg3 5.Qxf5 Nxf5 -+]
2...Rac8 3.a4 h6! 4.Rd7
[4.b3 Qf5 5.Qb2
(5.Bh4 g5 -+)
5...Nxf2 6.Kxf2 Rc2+ -+]
4...Qb6! 5.b4
[5.Qa1 Nxg3 6.hxg3 Rxe3+ 7.fxe3 Qxe3+ 8.Kd1 Qe2#]
[5.Rd4 Nc3 6.Qa1 Ne2 7.Rd2 Nxg3 8.hxg3 Rxe3+ 9.fxe3 Qxe3+ 10.Kd1 Qb3+
11.Ke1 Re8+ and mates]
5...Nc3 6.Qc1 Qxb4 7.Bd6 Qxa4 8.Rc7 Rxc7 9.Bxc7 Qc4 10.Qc2 Qxc7 -+
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