Author: guy haworth
Date: 05:18:06 11/08/01
Go up one level in this thread
Nice example. No extant EGT covers castling rights (though Nalimov covers e.p.) - and the last EGT to so do was apparently by Dekker in the 1980s. There are in fact 32 'zones' to an endgame, defined by the 2^5 combinations of the 5 castling/e.p. features, some of these zones being empty if the required Ps and/or Rs are not available: however, note that KRPKRP features everything except castling-options on both the K and Q sides. Certainly, there are studies that require O-O-O in the solution: A. Selesniev, Tidskrift for Schack, 1921: e1b6 0400.10 3/2 Win ... wKe1,wRa1,wpd6/bKb6,bRb2 1. d7 (1. O-O-O? Ra2 2. d7 Ra1+ 3. Kc2 Rxd1 4. Kxd1 Kc7 =; 1. Ra8? Kc6 =) Kc7 2. d8=Q (2. O-O-O? Rb8 =) Kxd8 3. O-O-O+ ... remarkably similar to your example. G
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