Problem Display
PID: 222081 (5R2/krp5/8/2P4B/8/P4QK1/8/8 w - - 0 1)

Koller, Paul

Freie Presse, 1968

5R2/krp5/8/2P4B/8/P4QK1/8/8

#4

6 + 3


6490 yacpdb 2020

SOLUTION


  • SOUND
  • Keys
    • 1.Ra8+!
      • 1...Kxa8
        • 2.Qc6
          • threat
            • 3.Bf3
              • threat
                • 4.Qxb7#
              • 3...Ka7
                • 4.Qxb7#
              • 3...Kb8
                • 4.Qxb7#
          • 2...Ka7
            • 3.Bf3
              • threat
                • 4.Qxb7#
              • 3...Ka8
                • 4.Qxb7#
              • 3...Kb8
                • 4.Qxb7#
              • 3...Rb1
                • 4.Qa8#
              • 3...Rb2
                • 4.Qa8#
              • 3...Rb3
                • 4.Qa8#
              • 3...Rb4
                • 4.Qa8#
              • 3...Rb5
                • 4.Qa8#
              • 3...Rb6
                • 4.Qa8#
              • 3...Rb8
                • 4.Qa4#
          • 2...Kb8
            • 3.Bf3
              • threat
                • 4.Qxb7#
              • 3...Ka7
                • 4.Qxb7#
              • 3...Ka8
                • 4.Qxb7#
              • 3...Kc8
                • 4.Qe8#
              • 3...Rb1
                • 4.Qa8#
              • 3...Rb2
                • 4.Qa8#
              • 3...Rb3
                • 4.Qa8#
              • 3...Rb4
                • 4.Qa8#
              • 3...Rb5
                • 4.Qa8#
              • 3...Rb6
                • 4.Qa8#
              • 3...Ra7
                • 4.Qe8#

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).