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Subject: Re: interresting mate + bug in RebelXP ????

Author: James T. Walker

Date: 14:17:05 08/10/02

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On August 10, 2002 at 04:53:13, Vincent Lejeune wrote:

>after 42. a7 in the following game:
>[d]8/P5k1/7p/3p4/8/6PP/2p1nP1K/8 b - -
>
>here RebelXp anlysis window show : c1=Q Kg2 cxa3 a8=Q axa8 Kf1 axa2 ???????
>it's the first bug I found in this engine and i'm disapointed :'(
>after playing c1=Q and Kg2 RebelXP find the mate pretty quicky ...
>
>
>in fact it's mate in 12, tiger is very fast to find it, fritz 7 have some
>problems ...
********************
Shredder 6 Classic says it's mate in 10:

10.01	 0:01 	+15.54++	1...c1Q 2.h4 Qg1+ 3.Kh3 Qxf2 4.h5 (685.278) 400.0
 10.01	 0:02 	+15.82	1...c1Q 2.Kg2 Qg1+ 3.Kf3 Nd4+ 4.Ke3 Qa1 5.Kd3 Qd1+ 6.Kc3
Ne2+ 7.Kb2 Qd4+ 8.Kb3 Qxa7 9.f3 (1.215.704) 448.1
 11.01	 0:02 	+15.82	1...c1Q 2.Kg2 Qg1+ 3.Kf3 Nd4+ 4.Ke3 Qa1 5.Kd3 Qd1+ 6.Kc3
Ne2+ 7.Kb2 Qd4+ 8.Kb3 Qxa7 9.f3 (1.308.090) 452.9
 12.01	 0:03 	+16.07++	1...c1Q 2.Kg2 Qg1+ 3.Kf3 Nd4+ 4.Ke3 Qa1 5.Kd3 Nf3 6.Kc2
Qxa7 7.Kb2 (1.567.698) 448.6
 12.01	 0:03 	+16.57++	1...c1Q 2.Kg2 Qg1+ 3.Kf3 Nd4+ 4.Ke3 Qa1 5.Kd3 Nf3 6.Kc2
Qxa7 7.g4 Qxf2+ 8.Kb3 (1.582.037) 444.8
 12.01	 0:05 	  +M13	1...c1Q 2.Kg2 Qg1+ 3.Kf3 Nd4+ 4.Ke3 Qa1 5.Kd3 Nf3 6.g4 Qc1
7.Ke2 Nd4+ 8.Kd3 Qc4+ 9.Kd2 Nf3+ 10.Kd1 Qa2 11.Kc1 Nd4 12.Kd1 Qc2+ 13.Ke1 Qc1+
(2.583.161) 458.1
 13.01	 0:07 	  +M13	1...c1Q 2.Kg2 Qg1+ 3.Kf3 Nd4+ 4.Ke3 Qa1 5.Kd3 Nf3 6.g4 Qc1
7.Ke2 Nd4+ 8.Kd3 Qc4+ 9.Kd2 Nf3+ 10.Kd1 Qa2 11.Kc1 Nd4 12.Kd1 Qc2+ 13.Ke1 Qc1+
(3.189.894) 429.1
 14.01	 0:42 	  +M10	1...c1Q 2.Kg2 Qg1+ 3.Kf3 Qd1 4.Ke3 Nc1 5.f3 Qd3+ 6.Kf2 Qe2+
7.Kg1 Qxf3 8.h4 Ne2+ 9.Kh2 Qxg3+ 10.Kh1 Qh3+ (18.375.814) 435.3

***************************
>
>
>
>[Event "Partie s鲩euse, 3m + 0s"]
>[Site "Grande salle de jeu"]
>[Date "2002.08.10"]
>[Round "?"]
>[White "elbe-biber"]
>[Black "Vinvin"]
>[Result "0-1"]
>[ECO "D02"]
>[WhiteElo "2272"]
>[BlackElo "2114"]
>[PlyCount "86"]
>[EventDate "2002.??.??"]
>
>1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O Nbd7 8. a3
>Bxc3 9. bxc3 b6 10. a4 Ba6 11. cxd5 Bxd3 12. Qxd3 exd5 13. Ba3 Re8 14. Rad1 Rb8
>15. Rfe1 Qc7 16. h3 Qc6 17. a5 c4 18. Qf5 b5 19. Ne5 Nxe5 20. dxe5 Ne4 21. Rd4
>Nxc3 22. Bd6 Rbd8 23. Rh4 h6 24. Rg4 Rxd6 25. exd6 Qxd6 26. Qh5 b4 27. Rf4 Qe7
>28. e4 b3 29. e5 b2 30. e6 Qxe6 31. Rxe6 b1=Q+ 32. Kh2 Rxe6 33. Qxf7+ Kh7 34.
>Qxe6 Qd3 35. Qd7 Qe2 36. Rg4 Qe5+ 37. g3 Ne2 38. Qxa7 c3 39. a6 c2 40. Rxg7+
>Qxg7 41. Qxg7+ Kxg7 42. a7 c1=Q 43. a8=Q Qg1# 0-1



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