Author: Richard Pijl
Date: 01:03:35 02/28/03
Go up one level in this thread
On February 26, 2003 at 14:20:26, Steffen Jakob wrote: >Here is a position from Fritz 7 - Hossa: > >[D]1r6/R1K2pkp/B1R1p1b1/1P1p2P1/3P4/1r6/8/8 b - - 0 53 > >The Rb8 is attacked. I think every move to a square of the 8th rank loses >because white is able to push his b pawn (in the game Hossa played Rf8? and lost >quickly). > >How long does your favourite engine see that 53... R8xb5 or 53... R3xb5 draws? >My main line is 53... R8xb5 54. Bxb5 Rxb5 55. Rxe6 Rb4 56. Re8 h6 and black >looks pretty safe. The Baron 0.99.6b3 chooses R8xb5 almost instantly on a PIII-500. It takes a little while before it shows a drawing score though: ply time nodes score pv 5(11). 0 12259 -98 b8b5 a6b5 b3b5 c6b6 g6d3 6(10)& 0 15162 -131 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 6(12)> 0 21544 -130 b8e8 6(14)& 0 38175 -107 b8e8 b5b6 e6e5 a6c8 e5d4 b6b7 e8e7 c8d7 6(14). 0 54979 -107 b8e8 b5b6 e6e5 a6c8 e5d4 b6b7 e8e7 c8d7 7(16)& 1 149270 -138 b8e8 b5b6 h7h5 a6c8 e8e7 c8d7 h5h4 b6b7 h4h3 c6c1 7(16)> 1 151172 -131 b8b5 7(16)& 1 154170 -131 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 7(16). 2 228271 -131 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 8(15)& 2 244806 -159 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 8(18). 13 1247201 -159 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 9(16)& 14 1281348 -125 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 g7g8 9(20). 36 3295684 -125 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 g7g8 10(19)& 37 3390911 -104 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 d4g4 10(21). 94 8532758 -104 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 d4g4 11(21)& 96 8748581 -77 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 d4g4 11(22). 157 14209506 -77 b8b5 a6b5 b3b5 c6e6 b5b4 e6e7 b4d4 c7d6 d4g4 12(23)& 165 15083169 -46 b8b5 a6b5 b3b5 c6e6 b5b4 e6e1 b4d4 c7c6 h7h6 c6c5 12(23). 234 21418047 -46 b8b5 a6b5 b3b5 c6e6 b5b4 e6e1 b4d4 c7c6 h7h6 c6c5 13(25)& 268 24931399 -28 b8b5 a6b5 b3b5 c7d6 h7h6 g5h6 g7h6 c6c1 b5b4 d6c5 b4b8 c1h1 h6g5 h1g1 g5f4 g1f1 f4e3 Richard
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