Problem Display
PID: 23411 (8/3p4/1K1pn1pB/2p2pP1/3k1P2/4NP2/1P2P3/5N2 w - - 0 1)

Evans, DW

The Observer, 1962

8/3p4/1K1pn1pB/2p2pP1/3k1P2/4NP2/1P2P3/5N2

#3

9 + 7


SOLUTION


  • SOUND
  • Sets
    • 1...Sxf4
      • 2.Bg7#
    • 1...Sxg5
      • 2.Bg7#
    • 1...Sc7
      • 2.Bg7#
    • 1...Sg7
      • 2.Bxg7#
    • 1...Sd8
      • 2.Bg7#
    • 1...Sf8
      • 2.Bg7#
    • 1...c4
      • 2.Sc2+
        • 2...Kd5
          • 3.Sfe3#
    • 1...d5
      • 2.Sc2+
        • 2...Kc4
          • 3.Sd2#
  • Tries
    • 1.Sc2+?
      • 1...Kd5
        • 2.Sfe3#
      • 1...Kc4!
  • Keys
    • 1.Ka5!
      • 1...c4
        • 2.Kb4
          • 2...Sxf4
            • 3.Bg7#
          • 2...Sxg5
            • 3.Bg7#
          • 2...Sc5
            • 3.Bg7#
          • 2...Sc7
            • 3.Bg7#
          • 2...Sg7
            • 3.Bxg7#
          • 2...Sd8
            • 3.Bg7#
          • 2...Sf8
            • 3.Bg7#
          • 2...c3
            • 3.bxc3#
          • 2...d5
            • 3.Sc2#
      • 1...d5
        • 2.Sc2+
          • 2...Kc4
            • 3.Sd2#

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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).