Author: blass uri
Date: 13:02:21 07/17/00
Go up one level in this thread
On July 17, 2000 at 15:27:36, Chessfun wrote: >On July 17, 2000 at 15:23:15, blass uri wrote: > >>On July 17, 2000 at 13:41:53, pavel wrote: >> >>>On July 17, 2000 at 11:01:29, José Antônio Fabiano Mendes wrote: >>> >>>>[D]2R4Q/3qkp2/3r2p1/3p3p/3P3P/5P2/5KP1/8 w >>>>"Spassky´s famous loss!He played 1.Qf8+ Kf6 2.Re8 but after >>>>2...Re6 3.Qh8+ Kf5 4.Qh6 Kf6 White has no more than a draw. >>>>Chekhover subsequently pointed out what had been missed by >>>>both players --- 1.g4! to use his pawns to take vital squares >>>>off the enemy king." Can the chess programs find this move? JAFM >>>>Source:"Spassky´s 100 Best Games" by Bernard Cafferty,second >>>>edition 1973,Batsford,section "Find the Winning Continuation!", >>>>page 246,position 6 ============================================ >>> >>> >>>this is what junior6 finds.....in 14 plies. 3 mins >>> >>>Analysis by Junior 6.0: >>> >>>1. ± (0.99): 1.g2-g4 h5xg4 >>>2. ± (0.78): 1.Qh8-f8+ Ke7-f6 2.g2-g4 Rd6-e6 3.g4xh5 >>> >>>(mahamood, MyTown 18.07.2000) >> >>Depth 14 of Junior is not 14 plies and I think that using the 2 options make all >>the chessbase engines slower. >> >>You should use only one option. >> >>Uri > > >I think he means 14 half moves. >New position >2R4Q/3qkp2/3r2p1/3p3p/3P3P/5P2/5KP1/8 w - - 0 1 > >Analysis by Junior 6.1: >1.g4 hxg4 2.Qf8+ Kf6 3.fxg4 Ra6 4.Qh8+ Ke7 5.h5 Rb6 6.Qe5+ Re6 7.Qb8 > ± (0.89) Depth: 14 00:00:43 13945kN > >(Bird, Scarb 17.07.2000) > >Thanks. Depth 14 of Junior does not mean 14 half moves. Quiet moves are counted as depth 2 and not quiet moves are counted as depth 1. 1.e4 e5 2.Nf3 Nc6 may be counted as depth 6. e4 is depth 2 e5 is depth 2 Nf3 is not a quiet move (threat e5) so it is depth 1 Nc6 is not quiet move (defend e5) so it is also depth 1. I am not sure about the definition of quiet moves but I know that this is the idea behind the depth of Junior. Uri
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