Author: Steffen Jakob
Date: 22:53:47 09/09/99
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Hi Bob! The position I gave you comes from a blitz game which Hossa played at ICC (I think it was against Occam). Hossa is rather weak in endgames and therefore I decided to concentrate on this position for a long time to find out how I can improve the search and evaluation in such endgames. I started to work on this position about 3 weeks ago and found many many bugs in Hossa (which unfortunately still are not all fixed). Positions which are "trivial" for humans can be difficult for comps! On September 10, 1999 at 00:19:37, Robert Hyatt wrote: >Here is an interesting position given to me by Steffen Jakob: > > /p/P5p/7p/7P/4kpK/// w > > +---+---+---+---+---+---+---+---+ > 8 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > 7 | *P| | | | | | | | > +---+---+---+---+---+---+---+---+ > 6 | P | | | | | | *P| | > +---+---+---+---+---+---+---+---+ > 5 | | | | | | | | *P| > +---+---+---+---+---+---+---+---+ > 4 | | | | | | | | P | > +---+---+---+---+---+---+---+---+ > 3 | | | | | *K| *P| K | | > +---+---+---+---+---+---+---+---+ > 2 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > 1 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > a b c d e f g h > > >Obviously black is getting crushed. He has one move, Kh3, which leads to a >mate in 6. Steffen asked me to try this and Crafty found a mate in 4, which >You ought to find the following variation as one mate in 6: > >Kh3, f2, Kg2, Ke2, Kg3, f1=Q, Kh2, g5, hg, Kf3, g6, Qg2# There are other lines: 1.Kh2 f2 2.Kg2 Ke2 3.Kh1 f1Q+ 4.Kh2 g5 5.Kg3 Qf2+ 6.Kh3 g4# Your program also has to see this line with an underpromotion: 1.Kh3 f2 2.Kg2 Ke2 3.Kh3 Kf3 4.Kh2 f1R! 5.Kh3 Rh1# >Have fun... "fun"?? hmmmm ;-) >I did... :) Greetings, Steffen.
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