Author: Uri Blass
Date: 20:22:25 11/09/00
Go up one level in this thread
On November 09, 2000 at 22:51:40, Robert Hyatt wrote:
>On November 09, 2000 at 19:38:42, Uri Blass wrote:
>
>>On November 09, 2000 at 18:33:05, Robert Hyatt wrote:
>>
>><snipped>
>>>OK... Here is a good point for discussion. My evaluation at this point
>>>is somewhere between -.2 and -1.0, depending on how deep you let it
>>>search. Here is the position:
>>>
>>>[D]2rr2k1/1p1b2p1/p3p2n/2Bp3B/1P3P1Q/PP5R/1q5P/4R2K b
>>>
>>>It is black to move. White has the rook and queen doubled on the h file.
>>>Black has the h-file blocked with the knight on h6. White has no way to
>>>drive the knight off, and no easy way to capture the knight with some sort
>>>of trade. IE the h-file is not going to be used for an attack very easily.
>>>
>>>Do you (or anybody) think that white is really up the equivalent of one
>>>piece (+3.42) here?
>>
>>I think that the last move Kh1 was a mistake and better was Qe7 and white is
>>winning for example Qe7 e5 Rg3 exf4 Rg2 Qc3 Rd1
>>
>>Tiger13 is stronger and has no problem to find Qe7 but gambittiger prefers
>>speculation of 3 pawns and not winning material.
>>
>>Gambittiger did not like Qe7 because of Qf6 and white wins only the excange that
>>is not enough for 3 pawns.
>>
>>
>><snipped>
>>>>70...Ne8 71.Rxc6 { Score: 0,96
>>>
>>>Prior to this point, I would have expected a draw. two pieces for a rook
>>>is generally an advantage. I would not expect to lose such a position very
>>>often since the two pieces are generally much stronger. This "bad trade"
>>>score has been influencing the scores crafty produces for quite a while in
>>>the game. It is one of those 'speculative' type scores that just happens to
>>>be wrong here, but it is right far more often than it is wrong.
>>
>>Gambittiger also expected a draw(evaluation +0.24 before Ne8) and I think that
>>the mistake of crafty was 70...Ne8 and I guess that after 70...Nd5
>>
>>Uri
>
>
>I let crafty chug for a while after Qe7, and it likes e5, with a score that
>is not much different from the Kh1 score. IE it doesn't see any loss of
>material that It reports... this was through depth=12...
>
>Here is the 13 ply output:
>
> 13 10:54 -1.39 39. ... e5 40. Rh4 e4 41. Bb6 Qf6 42.
> Bxd8 Rxd8 43. Qxf6 gxf6 44. Kf2 Rc8
> 45. Re2 Nf5 46. Rg4+ Kh7
I know that it does not see but if you play against it the line 39...e5 40.Rg3
exf4 41.Rg2 Qc3 Rd1 then it is going to see and black cannot improve at move 40
or 41.
This is the reason that I gave this line.
Uri
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