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Last update: 05/03/98 |

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Title: Encyclopaedia of Chess Endings IV
Author: Editorial Board et. Contributors
Editorial: Chess Informant (Sahovski Informator)
ISBN: 86-7297-015-2, 446 pages
Copyright: Sahovski Informator, 1989
Abstract: This IVth volume of the Encyclopaedia
of Chess Endings is totally dedicated
to the most difficult endgames of all,
Queen endgames. Here you'll find 1800
outstanding and comprehensive endings,
thoroughly classified, fully analyzed.
100s of them (the most subtle ones),
have been computer-analyzed with KDKT
and BELLE, showing up a new dimension:
error-free, exact, optimum analysis.
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Reviewer Notes: In this difficult ending taken from an actual game, the only move that wins is 1. ... Kf8 !!. The tempting move 1. ... Qxc4 only gives a draw after White answers 2. Nfe4. The Principal Variation given by Skembris in his analysis runs like this: 1. ... Kf8 !! 2. d6 Qc4 3. Nfe4 Qf1 4. Nf2 Qc1 5. Nce4 Qe3 6. Kg2 c4 7. f6 Ke8 8. Ng3 c3 9. d7 Kd7 10. f7 Qe7 11. Nd3 c2 12. Nf5 Qf7 13. Ne5 Ke6 and White resigned. The analysis includes also six main variations, fully commented using the proprietary code system. Chess Genius 1.0, running on a P100 and using a hash table of 320 Kb (as always), does not find the correct move 1. ... Kf8 !!. After some 7 hours, it reaches a depth of 14/26 plies, yet it only discovers the drawing move 1. ... Qf1xc4, evaluated at +1.75. Not good. Crafty 12.9 running on the same hardware, with a larger 6 Mb hash table, plus another Mb for the pawn structures, looks at 15/20 plies in some 3 hours, but cannot find the winning move, just the same drawing move as CG1.0, namely 1. ... Qxc4, though with a larger evaluation, +2.620.
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