Author: Uri Blass
Date: 19:16:26 04/25/01
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On April 25, 2001 at 19:52:59, Jeroen van Dorp wrote: >[D]k4q2/nb1N4/8/8/8/6Q1/8/6K1 b - - 0 7 > >Can anyone explain why Junior 6a (128Mb hash on my PIII@840MHz) does this? > >(Diepte=Depth) > >Analysis by Junior 6.0: > >7...Be4 8.Nxf8 Nb5 9.Kf2 > +- (8.83) Diepte: 6 00:00:00 1kN >7...Qd8! > +- (8.10) Diepte: 9 00:00:00 8kN >7...Qd8! > +- (8.10) Diepte: 9 00:00:00 8kN >7...Be4! > +- (7.90) Diepte: 9 00:00:01 27kN, tb=2 >7...Be4 8.Nxf8 Kb7 9.Qb3+ Ka8 10.Qa4 Bf5 > +- (5.94) Diepte: 9 00:00:01 67kN, tb=2 >7...Nb5! > +- (5.93) Diepte: 9 00:00:01 81kN, tb=2 >7...Nb5 8.Nxf8 Ka7 9.Nd7 Bd5 10.Ne5 > +- (5.79) Diepte: 9 00:00:01 95kN, tb=2 >7...Nb5 8.Nxf8 Be4 9.Nd7 Kb7 10.Qb8+ Kc6 11.Qb6+ Kd5 12.Qxb5+ Ke6 13.Qb6+ Kxd7 >14.Qd4+ Kc6 15.Qxe4+ Kc5 16.Qe5+ Kc4 > +- (8.79) Diepte: 12 00:00:02 636kN, tb=35 >7...Bc6 8.Nxf8 Kb7 9.Qg7+ Kb6 10.Nd7+ Kb7 11.Nb6+ Ka6 12.Qa1+ Kb7 13.Nc4 Nb5 >14.Ne3 > +- (5.88) Diepte: 12 00:00:03 1021kN, tb=71 >7...Qd8! > +- (5.49) Diepte: 12 00:00:04 1487kN, tb=106 >7...Qd8! > +- (5.19) Diepte: 15 00:00:05 1964kN, tb=162 >7...Qd8! > +- (4.89) Diepte: 17 00:00:20 9261kN, tb=1325 >7...Qd8! > +- (4.59) Diepte: 19 00:00:50 20029kN, tb=2411 >7...Qd8! > +- (4.29) Diepte: 20 00:01:37 42398kN, tb=5385 > > >and after the disastrous move 7....Qd8 gives this idiotic analysis with me here? > > >Analysis by Junior 6.0: > >8.Qb8+ Qxb8 9.Nb6# > = (0.00) Diepte: 6 00:00:00 1kN >8.Qb8+ Qxb8 9.Nb6# > = (0.00) Diepte: 9 00:00:00 18kN >8.Qb8+ Qxb8 9.Nb6# > = (0.00) Diepte: 12 00:00:02 603kN, tb=3 >8.Qb8+ Qxb8 9.Nb6# > = (0.00) Diepte: 15 00:00:12 8628kN, tb=157 >8.Qb8+ Qxb8 9.Nb6# > = (0.00) Diepte: 17 00:00:41 34114kN, tb=1545 >8.Qb8+ Qxb8 9.Nb6# > = (0.00) Diepte: 18 00:02:01 106766kN, tb=6441 > > >Is it a mistake with my copy of Junior 6a, can anyone reproduce it, or is it a >known issue? The "fact" that a side with only a knight cannot mate is known for Junior so it believes that after Qb8+ Qxb8 the best that white can hope for is a draw, I guess that if you turn off insufficient material you can get a different analysis. Uri
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