Author: George Tsavdaris
Date: 17:00:05 05/05/04
Go up one level in this thread
On May 05, 2004 at 18:15:54, Vincent Lejeune wrote: >In the article "Tactics from the Russian Team Champ" on the chessbase site ( >http://www.chessbase.com/newsdetail.asp?newsid=1625 ) >We can see this position : >[D]r1r3k1/3n1b2/p1qp3Q/1p2p2p/4P3/1PP1BP2/2P5/1K1R1B2 w - - 0 29 >with the comment "29.Bxb5!! ...this clearance sacrifice."; In fact Bxb5 is only >the third best move, Chessmaster 9000 confirms that with the 3 best moves mode : As all moves lead to mate, all moves are the best ones. So i don't think Bxb5 deserves a (!!) but only a (!) . Also the below analysis doesn't prove that Bxb5 is not a mate in 6 or 7 for example, so it may be the quickest mate after all. > >Time Depth Score Positions Moves >4:48 1/13 Mate07 127988483 29.Bh3 Nf6 30.Qxf6 Qe8 31.Bh6 Qf8 > 32.Rg1+ Bg6 33.Qxg6+ Kh8 34.Bxf8 > Rxf8 35.Qg7# >4:54 1/13 Mate08 130793582 29.Bc4 Qxc4 30.Rg1+ Bg6 31.Rxg6+ > Kf7 32.Rg7+ Ke8 33.bxc4 Rc7 34.Qxh5+ > Kd8 35.Qh8+ Nf8 36.Qxf8# >5:25 1/13 Mate15 145728017 29.Bxb5 Nf8 30.Rg1+ Bg6 31.Rxg6+ > Nxg6 32.Qxg6+ Kh8 33.Bg5 d5 34.Bxc6 > Rxc6 35.Qxc6 Rf8 36.Qh6+ Kg8 37.Qg6+ > Kh8 38.Qxh5+ Kg8 39.Bh6 Kh7 40.Bxf8+ > Kg8 41.Qh6 Kf7 42.Qg7+ Ke8 43.Qe7# > >And strange Shredder 8 : >in the 3 best moves mode, here is what I get from 3rd to 20th minute : > >Analysis by Shredder 8: > >1. +- (#200): 1.Fc4 Dxc4 2.bxc4 bxc4 3.Txd6 Fg6 4.Dxg6+ Rf8 >2. +- (#175): 1.Fh3 Dxe4 2.Tg1+ Dg4 3.Fxg4 hxg4 4.Txg4+ Fg6 5.Txg6+ Rf7 6.Tg7+ >Re8 >3. +- (20.89): 1.Fxb5 Cf8 2.Tg1+ Fg6 3.Txg6+ Cxg6 4.Dxg6+ Rh8 5.Fg5 d5 6.Fxc6 >Txc6 7.Dxc6 Tf8 8.Dh6+ Rg8 9.Dg6+ Rh8 10.Dxh5+ Rg8 11.Dg6+ Rh8 12.Ff6+ Txf6 >13.Dxf6+ Rg8 14.exd5 e4 15.d6 > > >I hope SMK will improve the evaluation of the depth of mate in Shredder 9 ! Yes, this is very annoying and i also hope he will fix it. It is there from Shredder 6.0. It usually displays the correct variation and score in the next ply.
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