Author: Dieter Buerssner
Date: 06:51:25 08/30/00
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On August 30, 2000 at 09:32:28, Larry Griffiths wrote: >On August 30, 2000 at 08:59:51, Michel Langeveld wrote: > >>On August 30, 2000 at 08:35:26, Larry Griffiths wrote: >> >>>I am testing the following WAC position... >>> >>>[D]8/7p/5k2/5p2/p1p2P2/Pr1pPK2/1P1R3P/8 b - - bm Rxb2; id "WAC002"; >>>What is the principle contiunation after Rxb2. I figure that it promotes a pawn >>>somehow. >>8/7p/5k2/5p2/p1p2P2/Pr1pPK2/1P1R3P/8 b - - acd 14; acn 114206936; ce 322; pv Rxb >>2 Rxb2 c3 Rb6+ Ke7 Rb7+ Kd6 Rb6+ Kc5 Rb7 c2 Rxh7 d2 Rc7+ Kd6 Rxc2 d1=Q+ Re2 Qf1+ >> Rf2 Qd3 h4 Qxa3; pm Rxb2; bm Rxb2; id "WAC.002"; > >It looks like I must run this to 17 or 18 plys deep then. I thought the >promotion might occur before 17 or 18 plys. If you have search extensions, you may need quite a few plies less. Before the promotion, there are 3 checks, 1 recapture and one pawn push to the 7th row. This may save 5 plies. Also, if you promote in qsearch, this can save another ply. I.e. Yace finds this allways at depth 10, and depending on settings, can find it also at depth 9. Dieter
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