Problem Display
PID: 146344 (1n1bn2B/1P3B1b/r4PpK/1pNP4/pp1kP3/6Q1/7P/2R5 w - - 0 1)

Chepizhni, Viktor Ivanovich

Rudenko, Valentin Fedorovich

The Problemist, 2012

1n1bn2B/1P3B1b/r4PpK/1pNP4/pp1kP3/6Q1/7P/2R5

#4

11 + 10


SOLUTION


  • SOUND
  • Keys
    • 1.Kg5!
      • threat
        • 2.Qf2+
          • 2...Ke5
            • 3.Qf4+
              • 3...Kd4
                • 4.e5#
      • 1...Bxf6+
        • 2.Kf4
          • threat
            • 3.Qf2#
            • 3.Qg1#
            • 3.Qd3#
            • 3.Qe3#
          • 2...g5+
            • 3.Qxg5
              • threat
                • 4.Qg1#
              • 3...Be5+
                • 4.Bxe5#
                • 4.Qxe5#
      • 1...Rxf6
        • 2.Se6+
          • 2...Kxe4
            • 3.Sc5+
              • 3...Kd4
                • 4.Qf4#
      • 1...Sxf6
        • 2.d6
          • threat
            • 3.Qd3+
              • 3...Ke5
                • 4.Qd5#
          • 2...Rxd6
            • 3.Rd1+
              • 3...Kxc5
                • 4.Qxd6#
          • 2...Sc6
            • 3.Qd3+
              • 3...Ke5
                • 4.Sd7#
                • 4.Qd5#
          • 2...Sd7
            • 3.Qd3+
              • 3...Ke5
                • 4.Sxd7#
                • 4.Qd5#
      • 1...Re6
        • 2.Sxe6+
          • 2...Kxe4
            • 3.Sc5+
              • 3...Kd4
                • 4.Qf4#
      • 1...Bc7
        • 2.Qf2+
          • 2...Ke5
            • 3.Qb2+
              • 3...Kd6
                • 4.e5#
            • 3.Qf4+
              • 3...Kd4
                • 4.e5#
      • 1...Sc7
        • 2.Qf2+
          • 2...Ke5
            • 3.Qb2+
              • 3...Kd6
                • 4.e5#
            • 3.Qf4+
              • 3...Kd4
                • 4.e5#

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).