Author: Uri Blass
Date: 14:57:34 01/26/02
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On January 26, 2002 at 16:12:33, Roy Eassa wrote: >On January 26, 2002 at 16:03:41, Roy Eassa wrote: > >>After nearly 6 minutes of thinking, f4 moves up from the 46th choice (out of 48 >>moves) to the 4th choice. At nearly 7 minutes it moves up to 2nd choice (after >>Rhe1). It finally moves to top place after 7:30 or so. > > >Hmm, the result is totally different when I show only one variation at a time: > >Fritz 7 - Eassa,R >3qr3/3bppbk/3p2p1/p1rN2Bn/PpnNP2P/1B3P2/1PP2Q2/1K1R3R w - - 0 1 > >21.Rhg1 Qb8 22.Qe2 e6 23.Bxc4 exd5 24.Bb3 Qc7 25.Qd3 dxe4 26.fxe4 Bc6 27.Nxc6 >Rxc6 > ² (0.44) Depth: 8/28 00:00:00 277kN > ² (0.63) Depth: 12/36 00:01:20 42340kN >21.f4 f6 22.f5 fxg5 23.hxg5 e6 24.fxe6 Bxe6 25.Nxe6 Rxe6 26.Qf7 Rxd5 27.exd5 Re7 > ² (0.66) Depth: 12/36 00:01:47 56684kN > ± (0.72) Depth: 12/38 00:02:06 67263kN > >I did not realize that showing multiple lines simultaneously would cause the >thinking to change so dramatically. Of course it is going to change the result It is known that programs have no idea about the exact value of the second best move and if you force them to know it then it cost time. Uri
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