Author: Steve Coladonato
Date: 11:50:25 04/22/99
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On April 22, 1999 at 14:39:17, José de Jesús García Ruvalcaba wrote: >On April 22, 1999 at 13:05:04, Steve Coladonato wrote: > >>At one time, there was a rule in chess that in the case of a known forced mate a >>player was allowed the standard 50 move rule or twice the number of moves with >>best play to execute the mate. The KNB vs K ending is a 34 move ending with >>best play. Therefore a player was allowed 68 moves to effect the mate. Does >>anyone know if this rule is still in effect? > > I have never heard of that rule. And the 50-move rule does not impose a limit >to deliver mate (in the case of KNB vs K mate is the only way for the strong >side to win, but in other cases there might be a pawn push or a capture). > I do not think this "twice the number of moves" rule is in effect, at least in >FIDE events. That is correct that the 50-move rule does not impose a limit to deliver mate. Only that if mate has not occurred and no pawn has been moved, a player can invoke a draw. Since the KNB v K ending does not have pawns and the ending is rather difficult to accomplish, the "old" rule essentially gave a player the chance to effect a mate even with an error or two knowing that even with "best play" it might require a minimum of 34 moves.
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