Problem Display
PID: 179563 (3K4/p2p4/r7/2P1N1Q1/2B1k3/8/5P2/8 w - - 0 1)

Armeni, Alberto

Problem Observer, 2011

3K4/p2p4/r7/2P1N1Q1/2B1k3/8/5P2/8

#3

6 + 4


SOLUTION


  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe3#
    • 1...d5
      • 2.Bxa6
        • 2...Kd4
          • 3.Qe3#
        • 2...d4
          • 3.Bb7#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qg4#
      • 1...Rf6
        • 2.Sd2+
          • 2...Kd4
            • 3.Qe3#
        • 2.Bd5+
          • 2...Kd3
            • 3.Qd2#
        • 2.Qxf6
          • threat
            • 3.Sd2#
            • 3.Sg5#
      • 1...Rg6
        • 2.Sd2+
          • 2...Kd4
            • 3.Qe3#
        • 2.Bd5+
          • 2...Kd3
            • 3.Qd2#
      • 1...Kxf3!
    • 1.Sf7?
      • threat
        • 2.Qg4#
      • 1...Kf3
        • 2.Qg3+
          • 2...Ke4
            • 3.Qg4#
      • 1...Rf6
        • 2.Qxf6
          • threat
            • 3.Sg5#
            • 3.Sd6#
      • 1...Rg6
        • 2.Qe3+
          • 2...Kf5
            • 3.Qf3#
      • 1...Kd4!
  • Keys
    • 1.Be2!
      • threat
        • 2.Bf3+
          • 2...Kd4
            • 3.Qe3#
      • 1...Kd4
        • 2.Qe3+
          • 2...Kd5
            • 3.Bc4#
      • 1...Kd5
        • 2.Sxd7+
          • 2...Kd4
            • 3.Qe5#
          • 2...Ke4
            • 3.Qe5#
          • 2...Kc6
            • 3.Qg2#
          • 2...Ke6
            • 3.Bc4#
      • 1...Ra3
        • 2.Sxd7
          • threat
            • 3.Qe5#
          • 2...Kd4
            • 3.Qe5#
      • 1...Rf6
        • 2.Qe3+
          • 2...Kd5
            • 3.Bc4#
          • 2...Kf5
            • 3.Bg4#

This is a version of 74020

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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).