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Subject: Re: Interesting position in the Comet-Junior CSCC game

Author: Torsten Schoop

Date: 14:15:16 01/03/98

Go up one level in this thread



On January 02, 1998 at 16:50:29, Amir Ban wrote:

>
>The first game Comet - Junior in CSCC has a challenging position for
>computers, fit for some test-suite material.
>
>On the 43rd move, black is an exchange up, and can win another piece to
>be a rook up, but this loses.
>
>Black manages to avoid Rxd3 on the 45th move, but plays it on the 47th
>move. Which program manages not to play Rxd3 both times ?

Hi all,

I have analysed  47th move (on P-120, 24 MB).

Junior 4.6 shows a very strange behaviour:

Time Depth Move Score
00:01  9   Rxd3 +1.93
00.07  9   Qd4+ +1.96 (PV: Qd4+ 48. Kg2 Rxd3)
00:17 12   Qd4+ +2.09
00:22 12   Rxd3 +2.10
01:33 14   Rxd3  0.00  (PV: Rxd3 48. Rxd3 Qxd3 49. Qxd3 Rxd3 50. c7 Rd1+
51. Kg2 Rc1 52. b6 g5 53. b7 Rc2+ 54. Kh1 Rc1+)
20:12 14   h4   +0.58

To comparison:

Rebel 9:
Time Depth Move Score
00:03  7   Rxd3 +2.55
00:09  8   Rxd3 +2.61
00:22  9   Rxd3 +2.65
01:13 10   Rxd3 +1.26
08:50 10   Ra2  +1.86

Fritz 5
Time Depth  Move Score
00:01  7/16  Rxd3 +2.74
00:07 10/23 Rxd3 +2.59
00:20 11/25 Rxd3 +1.63
01:57 11/31 Ra2  +1.66

Hiarcs 6
Time Depth  Move Score
00:02 5/19  Rxd3 +2.15
00:09 6/21  Rxd3  0.00
00:39 7/23  Ra2  +1.65

Well done, Bob! Crafty seems to be top in this position.


Ciao
Torsten



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