Author: Roy Eassa
Date: 14:25:04 05/03/02
Go up one level in this thread
On May 03, 2002 at 16:25:08, José Antônio Fabiano Mendes wrote:
>On May 03, 2002 at 16:22:48, José Antônio Fabiano Mendes wrote:
>
>> Arulaid - Gurgenidze, 1956
>> [D]3k4/7p/4K3/8/8/6p1/5p2/1R6 w
>> White resigned here, though he could force a draw :
>> 1. Kd6 Kc8 2. Rc1 Kb7 3. Rb1 Ka6 4. Kc6 Ka5 5. Kc5 Ka4
>> 6. Kc4 Ka3 7. Kc3 Ka2 8. Rf1 h5 9. Kd3 h4 10. Ke3 h3 11. Rxf2
>> with a draw. How long do the chess programs need to find
>> the hidden drawing line ? JAFM
>> Source ==> "Notes on the Endgame", by GM Nikolai Krogius.
>> Chess Digest Magazine, January 1973, page 53
Fritz 6 on Athlon 1.2 sees the move and a 0.00 score in under 1 second, then
changes the score to something like -0.97 for awhile. It finally locks in on
the draw at about 27 seconds.
1.Rb7--
= (0.06) Depth: 1/1 00:00:00
-+ (-5.50) Depth: 1/4 00:00:00
1.Kd5! g2
-+ (-3.09) Depth: 1/4 00:00:00
-+ (-1.50) Depth: 1/4 00:00:00
1.Kd6! Kc8 2.Rc1+ Kb7 3.Rb1+ Ka6 4.Kc6 Ka5 5.Kc5 Ka4
= (0.00) Depth: 1/4 00:00:00
= (0.00) Depth: 19/31 00:00:27 31052kN
Analysis:
1.Kd6 Kc8
[1...Ke8 2.Ke6 Kf8 3.Kf6 =]
2.Rc1+ Kb7 3.Rb1+ Ka6 4.Kc6 Ka5 5.Kc5 Ka4 6.Kc4 Ka3 7.Kc3 Ka2
8.Rf1! h5 9.Kd3 h4
[9...Kb3 10.Ke2 Kc2 11.Rxf2 =]
10.Rxf2+ {Several other moves draw here as well.}
10...gxf2 11.Ke2 =
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