Problem Display
PID: 191254 (8/1R6/4k3/2p5/8/8/3Q1P2/K7 w - - 0 1)

van Rey, Loek

Probleemblad, 2017

8/1R6/4k3/2p5/8/8/3Q1P2/K7

#4

4 + 2


SOLUTION


  • SOUND
  • Keys
    • 1.f3!
      • 1...Ke5
        • 2.Rf7
          • threat
            • 3.Qd7
              • 3...c4
                • 4.Rf5#
          • 2...Ke6
            • 3.Qd7+
              • 3...Ke5
                • 4.Rf5#
          • 2...c4
            • 3.Qd7
              • 3...c3
                • 4.Rf5#
      • 1...Kf5
        • 2.Rb6
          • 2...Ke5
            • 3.Qd6+
              • 3...Kf5
                • 4.Qf6#
          • 2...c4
            • 3.Qd4
              • threat
                • 4.Qf6#
              • 3...Kg5
                • 4.Qg4#
      • 1...Kf6
        • 2.Qd5
          • threat
            • 3.f4
              • threat
                • 4.Qf7#
              • 3...Kg6
                • 4.Qg5#
          • 2...Kg6
            • 3.f4
              • threat
                • 4.Qg5#
              • 3...Kf6
                • 4.Qf7#
              • 3...Kh6
                • 4.Qg5#
      • 1...c4
        • 2.Qh6+
          • 2...Kd5
            • 3.Rb5+
              • 3...Kd4
                • 4.Qd2#
          • 2...Ke5
            • 3.Rb5+
              • 3...Kd4
                • 4.Qd2#

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).