Author: Larry Griffiths
Date: 09:47:18 08/30/00
Go up one level in this thread
On August 30, 2000 at 09:51:25, Dieter Buerssner wrote: >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 Bob and Dieter, Bummer, no qsearch or extensions in my program yet. It chooses Rxb2 at 15 plys, but chooses C3 again at 16 plys. I have not seen if it locks in to Rxb2 at higher plys as my last run wanted to spend eternity at ply 16...
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