Problem Display
PID: 63574 (1k1K4/r1R5/1p1P4/1pPP4/pP6/P7/8/8 w - - 0 1)

Rudolph, William E

Source?, 0000

1k1K4/r1R5/1p1P4/1pPP4/pP6/P7/8/8

#4

7 + 5


16 Chess Amateur (The) 1909

SOLUTION


  • SOUND
  • Keys
    • 1.c6!
      • threat
        • 2.Rc8#
      • 1...Rxc7
        • 2.dxc7+
          • 2...Ka7
            • 3.c8R
              • 3...Ka6
                • 4.Ra8#
          • 2...Ka8
            • 3.c8Q+
              • 3...Ka7
                • 4.Qb7#
      • 1...Rb7
        • 2.cxb7
          • 2...Ka7
            • 3.Kc8
              • 3...Ka6
                • 4.b8S#
      • 1...Ra5
        • 2.d7
          • threat
            • 3.Ke7
              • threat
                • 4.d8Q#
              • 3...Kxc7
                • 4.d8Q#
              • 3...Ka8
                • 4.d8Q#
                • 4.d8R#
            • 3.Ke8
              • threat
                • 4.d8Q#
              • 3...Kxc7
                • 4.d8Q#
              • 3...Ka8
                • 4.d8Q#
                • 4.d8R#
          • 2...Ka8
            • 3.Ke7
              • threat
                • 4.d8Q#
                • 4.d8R#
              • 3...Kb8
                • 4.d8Q#
            • 3.Ke8
              • threat
                • 4.d8Q#
                • 4.d8R#
              • 3...Kb8
                • 4.d8Q#
      • 1...Ra6
        • 2.d7
          • threat
            • 3.Ke7
              • threat
                • 4.d8Q#
              • 3...Kxc7
                • 4.d8Q#
              • 3...Ka8
                • 4.d8Q#
                • 4.d8R#
            • 3.Ke8
              • threat
                • 4.d8Q#
              • 3...Kxc7
                • 4.d8Q#
              • 3...Ka8
                • 4.d8Q#
                • 4.d8R#
          • 2...Ka8
            • 3.Ke7
              • threat
                • 4.d8Q#
                • 4.d8R#
              • 3...Kb8
                • 4.d8Q#
            • 3.Ke8
              • threat
                • 4.d8Q#
                • 4.d8R#
              • 3...Kb8
                • 4.d8Q#

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).