Author: Uri Blass
Date: 12:48:46 09/14/03
Go up one level in this thread
On September 14, 2003 at 15:19:22, Drexel,Michael wrote: >On September 14, 2003 at 13:39:47, Uri Blass wrote: > >>On September 14, 2003 at 11:51:40, Drexel,Michael wrote: >> >>>On September 14, 2003 at 11:33:03, Rex wrote: >>> >>>>My personal Shredder settings finds Qc4+ in just over 1 minute. >>> >>>Fine, but Qc4+ is not better than Qxa5. >>> >>>1. Qc4+ Bf7 2. Qc7 Rc8 3. Qxa5 Kh8 4. Rc7 Ra8 5. Ra7 Rxa7 6. Qxa7 Bh5 >>> >>>Game over >> >>You may be right but you need to analyze more lines to be sure about it >> >>3.Qxa5 is only one option and white has some alternatives. >> >>When I go back with Yace it says 3.Qd7 -1.04/12,-0.99/13 >>2.Qc7 is also not obviously forced move and yace after going back says >>2.Qc6 -0.66/12 >> >>I do not claim that 1.Qc4 is the best move but I doubt if you really proved that >>it is losing. >> >>Uri > > >It was not my intention to prove it. >This is the line that your Shredder 7.04 evaluates -0.18 >after 27:54 minutes of search: > >1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Kh8 4.Rc7 Bxb3 5.Rfc1 Qxc1+ 6.Rxc1 > = (-0.18) Depth: 15/47 00:27:54 241582kN > >and his line was > >00:01:28.7 0.09 14 65827734 Qc4+ Bf7 Qc7 Rc8 Qxa5 Bxb3 a4 > >So Shredder would play the move 1.Qc4+ for the wrong reasons. > > >Michael I only wanted to show that shredder can see tactical problems with the original move. Shredder passed the test of seeing significant tactical problems with Qxa5. I am sure that with more time it can also see the lines that you showed. I also do not care about the pv and it is known that you can trust less later moves. Even if the line of the program leads to a forced loss that is harder to see relative to the original move then there is a chance that later it is going to see again better move because it can analyze deeper so even if the program does not see the right line it is important that it can find a better move. The fact that the program see a forced loss is a good reason to play a move that it does not see a forced loss after it. Uri
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