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Posers and Puzzles

Posers and Puzzles

  1. 06 Dec '06 21:47


    Mate in 2.

    How many mate threats does the key move create?
    Does that mean the solution has duals (more than one possible mate after a black defense)?
  2. Subscriber BigDoggProblem
    The Advanced Mind
    06 Dec '06 22:16
    Originally posted by David113
    [fen]7b/p2R2B1/rp4p1/pr4pp/PRb1NkBP/2N1p1pP/8/K7 w - - 0 1[/fen]

    Mate in 2.

    How many mate threats does the key move create?
    Does that mean the solution has duals (more than one possible mate after a black defense)?
    1.Nc5! with seven threats: Ne6, Nd5, Nd3, Ne2, Rf7, Rd4, Rxc4.
    However, after any Black move, only one mate remains, so there are no duals.

    1...Bxg7 2.Nd3#
    1...bxc5 2.Rxc4#
    1...Rxc5/Rxb4/axb4 2.Rd4#
    1...gxh4 2.Ne6#
    1...hxg4 2.Rf7#
    1...e2 2.Nd5#
    1...g2 2.Ne2#

    All threats are realized in at least one variation.