Author: Robert Hyatt
Date: 18:17:20 01/03/98
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On January 03, 1998 at 17:15:16, Torsten Schoop wrote: > >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 Of course, I can construct similar positions where it fails miserably... :) speculative is speculative, not necessarily the same as "accurate".. :)
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