Problem Display
PID: 250883 (4k3/4p3/4n3/4N3/8/8/4Q3/1K6 w - - 0 1)

Lewis, Robert Tony

The Problemist, 1991

4k3/4p3/4n3/4N3/8/8/4Q3/1K6

#3

3 + 3


SOLUTION


  • SOUND
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qxe6
          • threat
            • 3.Qc8#
            • 3.Qg8#
          • 2...Kd8
            • 3.Qd7#
          • 2...Kf8
            • 3.Qf7#
      • 1...Kd8
        • 2.Qc6
          • threat
            • 3.Sf7#
            • 3.Qd7#
      • 1...Kf8!
    • 1.Qg4?
      • threat
        • 2.Qxe6
          • threat
            • 3.Qc8#
            • 3.Qg8#
          • 2...Kd8
            • 3.Qd7#
          • 2...Kf8
            • 3.Qf7#
      • 1...Kf8
        • 2.Qg6
          • threat
            • 3.Sd7#
            • 3.Qf7#
      • 1...Kd8!
    • 1.Qb5+?
      • 1...Kd8
        • 2.Qd7#
        • 2.Qb8#
      • 1...Kf8!
    • 1.Qh5+?
      • 1...Kf8
        • 2.Qf7#
        • 2.Qh8#
      • 1...Kd8!
    • 1.Qa6?
      • threat
        • 2.Qxe6
          • threat
            • 3.Qc8#
            • 3.Qg8#
          • 2...Kd8
            • 3.Qd7#
          • 2...Kf8
            • 3.Qf7#
      • 1...Kd8
        • 2.Qc6
          • threat
            • 3.Sf7#
            • 3.Qd7#
      • 1...Sd8
        • 2.Qg6+
          • 2...Kf8
            • 3.Sd7#
          • 2...Sf7
            • 3.Qg8#
      • 1...Kf8!
    • 1.Qe4?
      • 1...Kd8
        • 2.Qc6
          • threat
            • 3.Sf7#
            • 3.Qd7#
      • 1...Kf8
        • 2.Qg6
          • threat
            • 3.Sd7#
            • 3.Qf7#
      • 1...Sd8
        • 2.Qg6+
          • 2...Kf8
            • 3.Sd7#
          • 2...Sf7
            • 3.Qg8#
      • 1...Sc7!
  • Keys
    • 1.Qg2!
      • 1...Kd8
        • 2.Qc6
          • threat
            • 3.Sf7#
            • 3.Qd7#
      • 1...Kf8
        • 2.Qg6
          • threat
            • 3.Sd7#
            • 3.Qf7#

FEATURES


NOT CLASSIFIED


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).