Author: Dan Ellwein
Date: 14:45:55 05/06/04
Go up one level in this thread
On May 06, 2004 at 13:13:52, John Merlino wrote: >On May 06, 2004 at 09:54:28, Dan Ellwein wrote: > >>On May 05, 2004 at 22:37:31, John Merlino wrote: >> >>>On May 05, 2004 at 20:00:05, George Tsavdaris wrote: >>> >>>>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. >>> >>>I have determined with reasonable certainty, from a little bit of poking around >>>with lines, that Bxb5 is at most a Mate in 14. There may be a Mate in 13 lurking >>>around in there, but no less. >>> >>>>> >>>>>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# >>> >>>jm >> >>Hi John >> >>CM9_OffSet finds a mate in 9 in 2 seconds, mate in 8 in 3 seconds, and a mate in >>7 in 49 seconds... > >That's cool. But the point of George's post was that he was saying that Bxb5 >might be the best move of all, as opposed to 3rd best according to the analysis >above. My post was confirming that it is the 3rd best move. It still is winning, >of course. And it is an excellent example of a clearance sacrifice, which was >the point of the position. guess I'm getting like Vincent... I'm posting without actually readin' the post <smile> Dan > >>btw... congrats on promotion to manager, sounds like yer doin' pretty good :) > >I'm trying. :-) Many thanks, > >jm
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