Problem Display
PID: 255082 (4k2b/pKppPp2/1p3p2/8/4R2p/2p3rr/4Q3/8 w - - 0 1)

Kozdon, Baldur

Probleemblad, 1984

4k2b/pKppPp2/1p3p2/8/4R2p/2p3rr/4Q3/8

#4

4 + 12


SOLUTION


  • SOUND
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qxd7+
          • 2...Kxd7
            • 3.e8Q+
              • 3...Kd6
                • 4.Qc6#
      • 1...d5
        • 2.Qa4+
          • 2...b5
            • 3.Qxb5+
              • 3...c6
                • 4.Qxc6#
      • 1...Rd3
        • 2.Qh5
          • threat
            • 3.Qxh8#
          • 2...d5
            • 3.Qxh8+
              • 3...Kd7
                • 4.Qd8#
          • 2...d6
            • 3.Qb5+
              • 3...c6
                • 4.Qxc6#
            • 3.Qxh8+
              • 3...Kd7
                • 4.Qc8#
                • 4.Qd8#
                • 4.e8Q#
            • 3.Kxc7
              • threat
                • 4.Qb5#
                • 4.Qxh8#
            • 3.Qf5
              • threat
                • 4.Qc8#
          • 2...Rdg3
            • 3.Qxh8+
              • 3...Rg8
                • 4.Qxg8#
          • 2...Rhg3
            • 3.Qxh8+
              • 3...Rg8
                • 4.Qxg8#
          • 2...Bg7
            • 3.Qxf7+
              • 3...Kxf7
                • 4.e8Q#
      • 1...Rg8
        • 2.Kxc7
          • threat
            • 3.Qxd7#
          • 2...Rd3
            • 3.Qxd3
              • threat
                • 4.Qxd7#
              • 3...d5
                • 4.Qb5#
              • 3...d6
                • 4.Qb5#
          • 2...d5
            • 3.Qa4+
              • 3...b5
                • 4.Qxb5#
          • 2...d6
            • 3.Qa4+
              • 3...b5
                • 4.Qxb5#
            • 3.Qd5
              • threat
                • 4.Qc6#
                • 4.Qa8#
                • 4.Qb5#

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).