Problem Display
PID: 78844 (B7/8/7Q/4k3/KNp5/8/5P2/8 w - - 0 1)

Howard, David M

3rd Prize, Problem Observer, 2007-2008

B7/8/7Q/4k3/KNp5/8/5P2/8

#3

5 + 2


136 Problem Observer 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe3#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qf6+
          • 2...Ke4
            • 3.Sb4#
            • 3.Sf4#
        • 2.f3
          • threat
            • 3.Qf6#
          • 2...Kd4
            • 3.Qe3#
          • 2...Kf5
            • 3.Qf6#
      • 1...Kf5
        • 2.f3
          • threat
            • 3.Qf6#
          • 2...Ke5
            • 3.Qf6#
      • 1...c3
        • 2.Qf6+
          • 2...Ke4
            • 3.Sb4#
            • 3.Sf4#
      • 1...Ke4!
    • 1.Bf3?
      • threat
        • 2.Sd5
          • threat
            • 3.Qf6#
          • 2...Kd4
            • 3.Qe3#
          • 2...Kf5
            • 3.Qf6#
      • 1...Kf5
        • 2.Sd5
          • threat
            • 3.Qf6#
          • 2...Ke5
            • 3.Qf6#
      • 1...c3!
    • 1.Bd5?
      • 1...c3
        • 2.f4+
          • 2...Kd4
            • 3.Qb6#
          • 2...Kf5
            • 3.Qg5#
      • 1...Kf5!
  • Keys
    • 1.Qg6!
      • 1...Kd4
        • 2.Qf6+
          • 2...Kc5
            • 3.Sa6#
      • 1...Kf4
        • 2.Qh5
          • 2...c3
            • 3.Sd3#
      • 1...c3
        • 2.Sd3+
          • 2...Kd4
            • 3.Qe4#

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).