Author: Tomas Casanovas Martinez
Date: 02:33:51 08/01/99
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On July 31, 1999 at 23:50:37, Victor Valenzia wrote:
>I pounded this position for about 8 hours on Hiarcs 7.32. Only one of the
>"experts" on msn.com recommends Rh8. The others recommend Rxa4. What do some
>of the other programs recommend?
Here you have what other top programmes evaluate:
Once solved some ‘technical’ problems I have got with my computers, here you
have the evaluation of eleven top chess programmes to our current position,
working in four Pentiums for around 10 hours. All the evaluations have been
stated from white perspective, so that all + means advantage for white and –
advantage for black. The main possibilities for black are:
A) 21... Rh8 recommended by Junior 5, Genius 6, Wchess 2000, Zarkov 5,
ChessMaster 6000 and Rebel 10. (6 votes)
B) 21 ... Ra4 recommended by Shredder 3, Hiarcs 7.32 and Fritz 5.32 (3
votes)
C) 21 ... Qb2 Crafty’s choice (1 vote) and
D) 21 ... f4 selected by Nimzo 2000 (1 vote).
In order to concentrate efforts in the better lines, I will not take in
consideration C) and D).
A) 21 .... Rh8
A1) 22 Rad1
A11) 22 ... b5
23 Rfe1 Qc4
24 Rd5 Rf8
25 Rd6+ Bd6
26 Qf8 ba4
27 Qg7 Qc2 Junior 5 (+0.44)
A12) 22 .... Qb2
23 Rfe1 Qc3
24 Re2 Kd8 Genius 6 (+0.81)
A13) 22 ... Qa4
23 Rfe1 h6
24 Bd2 Qh4
25 Qg6 Qf6
26 Qf6 Bf6
27 b4 Wchess 2000 (+1.19)
A14) 22 .... Bb2
23 Rfe1 Re8
24 Qe6+ Kc7
25 Rb1 Qa3
26 Qc4 Be5
27 Qf7 Rc8
28 Be7 a4 Cmaster 6000 (+0.43)
A2) 22 f4
A21) 22 .... Bd4
23 Kh2 Qb2
24 Rfe1 Bf6
25 Rab1 Qc3
26 Rc1 Qd4 Zarkov 5 (+0.33)
A22) 22 .... Bb2
23 f4 Bb2
24 Rae1 Re8
25 Qh7 Qd4+ Rebel 10 (+0.78)
B) 21 ... Ra4
B1) 22 Ra4 Qa4
B11) 23 Qh7 Bb2
24 Qg6 Shredder 3 (+1.06)
B12) 23 b3 Qb4
24 Qh7 Qb3
25 Qg6 Qd3
26 Rc1 Fritz 5.32 (-0.03)
B2) 22 Rae1 Qb2
23 Qh7 Ra2
24 Rb1 Qe2
25 Qg6 Hiarcs 7.32 (+0.45)
Victor, you gave more time to Hiarcs, so that your evaluation is obviously more
reliable than mine. Anyway, I have posted here the results I have obtained.
You will see that with the only exception of Fritz, all the programmes evaluate
the current position from a slight advantage for White (+0,25 to +0,75) to a
white's advantage (+0,75 to +1,25).
Despite the 'almost' unanimity of the programmes to choos 21 ... Rh8, I
personaly prefer 21 ... Ra4 following Shredder's, Fritz's and Irina's
recommendations. ;-)
Tom.
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