Author: Howard Exner
Date: 11:46:24 01/03/98
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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 ? I tested Rebel 8(K6-233) on both move 45 and 47. Here are the results: For move 45 it abandons Rxd3 at 0:46 in favour of Qc5. Move 47 is more difficult for Rebel 8. At 2:43 it decides to drop Rxd3 for Qd4+ then settles for the better Ra2 at 3:20. All this done in standard 40/2 tournament time but would have played the same as Junior in this faster time control tournament. >Is there a way >to win here ? The Ra2 plan looks strong followed by an eventual rook exchange then the move Rc8 > It's not even clear to me that black can avoid losing. >White can play 45. b6 or maybe even h3 and black is in some trouble. >Also interesting is that white can save the piece by 45. c7 but that may >be the only way to lose :) > >How to evaluate black's 43... e4 ? Maybe one exclamation mark for >playing it, two exclamation marks for NOT playing it ? > >Strangely enough, white got a decisive advantage but then failed to win. Junior set up the standard blockade and drew this one nicely. The text book Rook and Pawn vs Queen endgame blockade draw is usually given as White: Ke5 Qe7 Black: Kg8 Rf6 Pg7 White moves
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