Author: Robert Hyatt
Date: 14:31:04 02/05/99
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On February 05, 1999 at 11:57:56, Djordje Vidanovic wrote: >A couple of days ago I reported on the successful performance of two French >programs, Chess Wizard and Zchess, in the Aubervilliers rapid chess tournament. >As this particular position may have been overlooked, and as I believe that it >is worth analysing with different chess software, I'll try to bring it up again. > >White: GM Sekatchev, Black: Zchess 1.2: > >1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. d3 Bg7 6. h3 Qb6 7. Nc3 Qb4 8. O-O >Bxc3 9. a3 Qa5 10. bxc3 Qxc3 11. Rb1 Qa5 12. Bb2 f6 13. e5 f5 14. e6 Nf6 15. Qc1 >b6 16. Re1 O-O 17. Qh6 c4 18. dxc4 Bxe6 19. Rxe6 Rf7 20. Ng5 * 1-0 > > >on move 8, Black (Zchess 1.2) played 8...Bxc3. Of the tested programs, the only >one not yielding to the temptation was Zarkov 5 playing 8...Nf6, not bothering >to capture the Knight, which is, of course, a good move. Other programs, among >them Crafty 16.0, according to Zchess's author Franck Zibi, tend to play the >same bad move, 8...Bxc3. More info, with comments by Franck 1. e4 c5 2. Nf3 Nc6 >3. Bb5 g6 4. Bxc6 dxc6 5. d3 Bg7 6. h3 Qb6 7. Nc3 Qb4 8. O-OBxc3 9. a3 Qa5 10. >bxc3 Qxc3 11. Rb1 Qa5 12. Bb2 f6 13. e5 f5 14. e6 Nf6 15. Qc1b6 16. Re1 O-O 17. >Qh6 c4 18. dxc4 Bxe6 19. Rxe6 Rf7 20. Ng5 *Zibi, can be found at >http://www.forum64.com/. Some tested programs are (AMD K6-2/300): > >ZChess 1.2 Bxc3 ?? 11 +0.80 >WChess 2000 Bxc3 ?? 11 +0.88 >Crafty 16.0 Bxc3 ?? 12 +0.13 something is wrong with that crafty 16.0... I ran it here and the score is -.54 and it has a very hard time choosing between Bd7 and Bxc3. But it isn't 'happy' with the position at all. Current crafty never considers Bxc3 and only plays Bd7 thru depth=14... >Chess Genius 6 Bxc3 ?? 8 -0.06 >Fritz 5.0 Bxc3 ?? 11 -0.25 >Zarkov 5 Nf6 ! :-) 6 -0.19 > >What does your program play in this position? Bob, you said that you could not >reproduce 8...Bxc3. Could you retry it on your Quad? Others? with 16.0 I could get it to play Bxc3 if I stop the search at the right point. Newer versions don't ever show it as a best move... although it could be second- best for all I know... > >Regards, >Djordje
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