Author: Vincent Diepeveen
Date: 17:44:14 12/07/99
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On December 07, 1999 at 20:23:41, Robert Hyatt wrote: >On December 07, 1999 at 19:44:35, Vincent Diepeveen wrote: > >>Hello to All studiers of the game of chess with a program, >> >>Here a cool study which has next problems >> - some zugzwangs (black getting forced to move the queen) >> - the line(s) that win for white are forced till the end (singular) >> >>7k/2q3pP/6P1/8/8/8/6Pp/2RR3K/w - - > >I get this on my tiny sony notebook: > > > > > > 20 27:29 4.21 1. Rc4 Qd7 2. Rd5 Qe8 3. Re4 Qb8 4. > Re1 Qa8 5. Rf1 Qe8 6. Rd4 Qa8 7. Re4 > Qc8 8. Ra4 Qe8 9. Ra3 Qd8 the whole line has been searched such that it allows it to do a lot of moves which have as main goal to prevent a move repetition, though the initially idea looks to me definitely promising! Note that Kxh2 allows a stalemate by means of a few checks. 10. Kxh2 > Qh4+ 11. Kg1 Qe4 >It has liked Rc4 since about 40 seconds, and the score has gone up every >iteration. Quad xeon would be 3-4-5 times faster... >> >>black timeleft=666:40.00.00 >> - = - = - = - k ... 1 ... >> = - q - = - o O ... 2 ... >> - = - = - = O = ... 3 ... >> = - = - = - = - ... 4 ... >> - = - = - = - = ... 5 ... >> = - = - = - = - ... 6 ... >> - = - = - = O o ... 7 ... >> = - R R = - = K ... 8 ... >>white timeleft=666:40.00.00 >>white to move >> >>I estimated that for a program doing checks in qsearch >>and NOT having any extension and not having hashtable luck >>the solution is 22 ply to see. 23 ply otherwise. >> >>the solution is not found yet by my program (running >>at a dual celeron 550 with 300mb hash now under linux of >>cuz), as it's PVs are crap so far and it gives black the >>chance to sac queen somewhere near end of pv. >> >>I'm not a dreamer so i'm not gonna ask for an output >>of deep blue junior, but i love to see whether other >>progs make a chance here. >> >>It's adviced to use KRPKP and KPKP KPK >>egtb at least for this position, that should produce when >>seeing the good lines a score at HUGE depths of mate in XXX >>or something of over +15.0 >> >>I'm not using them with diep here, so perhaps diep never finds it... >>...i just pray for transposition luck right now... ...right now >>score is +7.7 which is by accident also the score for KRP KP here >>but i guess it didn't see it yet. >> >>Vincent
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