Author: John Merlino
Date: 16:55:32 03/03/03
Go up one level in this thread
On March 03, 2003 at 18:58:23, Uri Blass wrote: >On March 03, 2003 at 18:06:09, Matthew White wrote: > >>On March 03, 2003 at 17:02:36, Dann Corbit wrote: >> >>>On March 03, 2003 at 16:42:05, Albert Bertilsson wrote: >>> >>>>Hi! >>>> >>>>Warning! This is probably very easy for most of you with an intrest in chess, >>>>for anybody like me (intrested in programming, bad chess player) it could be >>>>something to think about though... >>>> >>>>Sharper put itself in this position: >>>> >>>[d]2k4r/2p5/6RB/4qp1Q/7P/P3P3/3r3P/R5K1 w - - >>>> >>>>With little time to think it made the bad move Qf5. Giving a second more it >>>>found Qf3. Since I could not believe that Sharper would lose that game (the 20 >>>>latest moves it had a quite nice advantage I simply couldn't understand what >>>>happened. Then I gave the position to crafty and saw how bad it thought the >>>>position was. After looking at it very carefully I also understood what the >>>>catch was. >>>> >>>>Can you see it too? >>>> >>>>/Regards Albert >>Just by looking at the position, it appears to me that Qxf5+ leads to rapid >>mate, since the black rook on the second rank traps the king. >> >>Matt > >The question is what is the reason to play Qxf5+ and the answer is that the >queen is lost in any case. > >I guess that the point is that weak players may miss Qxa1+ at first >looking(after seeing it the rest including winning the queen is easy to see). >I admit that I also missed it in the first seconds because I look at Qf3 Qxh2+ >and my Israeli rating for tournament time control(eqvivalent to fide rating) >should be 2030 if I do not play more games. > >I did not use a clock to find time but I guess that it took me something like 30 >seconds to see Qxa1+ because in the first seconds I analyzed Qxh2+ and saw >nothing good for black. > >The point is that for humans it is rleatively hard to see long moves. > >Maybe it is easier to see it when you see that the last move is Qe5 because if >you see the move than you ask yourself what is the threat of the piece that >moved > >Uri As it turns out, there is not TOO much difference between the two moves. According to Chessmaster 9000, Qxf5+ is a Mate in 7 for Black, and Qf3 is a Mate in at most 13 for Black. Might as well grab the pawn! :-) jm
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