Problem Display
PID: 190380 (8/2ppK3/3p4/3k4/8/2Q1B3/8/8 w - - 0 1)

Labrinakos, Petros

The Problemist Supplement, 2018

8/2ppK3/3p4/3k4/8/2Q1B3/8/8

#4

3 + 4


SOLUTION


  • SOUND
  • Keys
    • 1.Qc2!
      • threat
        • 2.Kf6
          • threat
            • 3.Kf5
              • threat
                • 4.Qe4#
          • 2...c5
            • 3.Qa4
              • 3...c4
                • 4.Qa8#
      • 1...Ke5
        • 2.Qc4
          • 2...Kf5
            • 3.Qf4+
              • 3...Kg6
                • 4.Qf7#
          • 2...c5
            • 3.Kf7
              • 3...Kf5
                • 4.Qf4#
              • 3...d5
                • 4.Qf4#
          • 2...c6
            • 3.Qf4+
              • 3...Kd5
                • 4.Qd4#
      • 1...c5
        • 2.Kxd7
          • 2...Ke5
            • 3.Qg6
              • threat
                • 4.Qe6#
              • 3...Kd5
                • 4.Qe6#
      • 1...c6
        • 2.Kf6
          • 2...c5
            • 3.Qa4
              • 3...c4
                • 4.Qa8#
        • 2.Qa4
          • threat
            • 3.Qd4#
          • 2...Ke5
            • 3.Qf4+
              • 3...Kd5
                • 4.Qd4#
          • 2...c5
            • 3.Kf6
              • 3...c4
                • 4.Qa8#

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).