Problem Display
PID: 217333 (5N1k/5Q2/4K1p1/4p3/1ppp2rr/1p6/8/8 w - - 0 1)

Sonnenfeld, Felix Alexander

1st Prize, Main-Post, 1962

5N1k/5Q2/4K1p1/4p3/1ppp2rr/1p6/8/8

#5

3 + 9


6490 yacpdb 2020

SOLUTION


  • SOUND
  • Keys
    • 1.Kd6!
      • threat
        • 2.Se6
          • threat
            • 3.Qg7#
          • 2...Rh7
            • 3.Qe8#
            • 3.Qf8#
      • 1...d3
        • 2.Kc6
          • threat
            • 3.Se6
              • threat
                • 4.Qg7#
              • 3...Rh7
                • 4.Qe8#
                • 4.Qf8#
          • 2...c3
            • 3.Kb6
              • threat
                • 4.Se6
                  • threat
                    • 5.Qg7#
                  • 4...Rh7
                    • 5.Qe8#
                    • 5.Qf8#
              • 3...Rh1
                • 4.Se6
                  • threat
                    • 5.Qg7#
                  • 4...Rh7
                    • 5.Qe8#
                    • 5.Qf8#
              • 3...Rh2
                • 4.Se6
                  • threat
                    • 5.Qg7#
                  • 4...Rh7
                    • 5.Qe8#
                    • 5.Qf8#
              • 3...Rh3
                • 4.Se6
                  • threat
                    • 5.Qg7#
                  • 4...Rh7
                    • 5.Qe8#
                    • 5.Qf8#
              • 3...Rh5
                • 4.Se6
                  • threat
                    • 5.Qg7#
                  • 4...Rh7
                    • 5.Qe8#
                    • 5.Qf8#
              • 3...Rh6
                • 4.Se6
                  • threat
                    • 5.Qg7#
                  • 4...Rh7
                    • 5.Qe8#
                    • 5.Qf8#

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).