Problem Display
PID: 141298 (3N1KR1/4p2p/5k2/4r3/6P1/1PB3pp/PP1p1pb1/Q2B1r1q w - - 0 1)

van Gool, Johann Christoffel

Phenix, 1989

3N1KR1/4p2p/5k2/4r3/6P1/1PB3pp/PP1p1pb1/Q2B1r1q

#4

10 + 11


SOLUTION


  • SOUND
  • Keys
    • 1.a4!
      • threat
        • 2.Qa3
          • threat
            • 3.Qxe7#
          • 2...e6
            • 3.Qe7#
      • 1...Bf3
        • 2.Qa3
          • threat
            • 3.Qxe7#
          • 2...Bxg4
            • 3.Qxe7+
              • 3...Kf5
                • 4.Qxe5#
      • 1...Bd5
        • 2.Qa3
          • threat
            • 3.Qxe7#
          • 2...Bxg8
            • 3.Qxe7+
              • 3...Kg6
                • 4.Qg7#
      • 1...Ba8
        • 2.Qa3
          • threat
            • 3.Qxe7#
          • 2...Qb7
            • 3.Bc2
              • threat
                • 4.g5#
              • 3...Qe4
                • 4.Qxe7#
              • 3...h6
                • 4.Rg6#
      • 1...h5
        • 2.Qa3
          • threat
            • 3.Qxe7#
          • 2...hxg4
            • 3.Qxe7+
              • 3...Kf5
                • 4.Qxe5#
            • 3.Bxg4
              • threat
                • 4.Qxe7#
              • 3...e6
                • 4.Qe7#

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).