Author: Robert Hyatt
Date: 17:23:41 12/07/99
Go up one level in this thread
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 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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