Problem Display
PID: 48569 (7Q/8/4k2K/3NPN1n/4p3/2P1pp2/3P4/8 w - - 0 1)

Challenger, Alfred Clement

1st Prize, Liverpool Courier, 1906

7Q/8/4k2K/3NPN1n/4p3/2P1pp2/3P4/8

#3

7 + 5


56 The Problemist 1929

SOLUTION


  • SOUND
  • Sets
    • 1...Kf7
      • 2.Sc7
        • threat
          • 3.Qe8#
          • 3.e6#
        • 2...Sg7
          • 3.Qxg7#
      • 2.Qc8
        • threat
          • 3.Sd6#
          • 3.e6#
  • Tries
    • 1.Sd4+?
      • 1...Kxd5
        • 2.Qb8
          • threat
            • 3.Qb5#
          • 2...Kc4
            • 3.Qb5#
          • 2...Kc5
            • 3.Qb5#
        • 2.Qe8
          • threat
            • 3.Qb5#
          • 2...Kc4
            • 3.Qb5#
          • 2...Kc5
            • 3.Qb5#
            • 3.Qc6#
      • 1...Kd7!
    • 1.Qe8+?
      • 1...Kxd5
        • 2.Sd4
          • threat
            • 3.Qb5#
          • 2...Kc4
            • 3.Qb5#
          • 2...Kc5
            • 3.Qb5#
            • 3.Qc6#
      • 1...Kxf5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Sd4+
          • 2...Kxd5
            • 3.Qb5#
          • 2...Kd7
            • 3.e6#
          • 2...Kf7
            • 3.e6#
      • 1...Kxd5
        • 2.Sd4
          • threat
            • 3.Qb5#
          • 2...Kc4
            • 3.Qb5#
          • 2...Kc5
            • 3.Qb5#
      • 1...Kxf5
        • 2.Sxe3+
          • 2...Kf4
            • 3.e6#
          • 2...Ke6
            • 3.Qe8#
      • 1...Kd7
        • 2.Qd6+
          • 2...Kc8
            • 3.Qc7#
          • 2...Ke8
            • 3.Qe7#
      • 1...Kf7
        • 2.Qc8
          • threat
            • 3.Sd6#
            • 3.e6#
      • 1...Sf4
        • 2.Sg7+
          • 2...Kxd5
            • 3.Qb5#
          • 2...Kd7
            • 3.Qc7#
            • 3.Qe8#
          • 2...Kf7
            • 3.Qe8#
      • 1...Sg7
        • 2.Sxg7+
          • 2...Kxd5
            • 3.Qb5#
          • 2...Kd7
            • 3.Qc7#
            • 3.Qe8#
          • 2...Kf7
            • 3.Qe8#
            • 3.e6#

FEATURES


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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).