Problem Display
PID: 26319 (K7/8/kqR5/7R/8/1r1p4/3n2Q1/r7 w - - 0 1)

Arefiev, Yuri

3rd Prize, Schach, 1989

K7/8/kqR5/7R/8/1r1p4/3n2Q1/r7

#4

4 + 6


SOLUTION


  • SOUND
  • Keys
    • 1.Qd5!
      • 1...Qxc6+
        • 2.Qxc6+
          • 2...Rb6
            • 3.Qc8+
              • 3...Rb7
                • 4.Qxb7#
      • 1...Ra2
        • 2.Re6
          • threat
            • 3.Qb7#
          • 2...Qc6+
            • 3.Rxc6+
              • 3...Rb6
                • 4.Qxa2#
                • 4.Qb5#
            • 3.Qxc6+
              • 3...Rb6
                • 4.Qb5#
                • 4.Qb7#
                • 4.Qxb6#
                • 4.Qc8#
          • 2...Qxe6
            • 3.Qxe6+
              • 3...Rb6
                • 4.Qxa2#
          • 2...Qd6
            • 3.Rxd6+
              • 3...Rb6
                • 4.Qxa2#
                • 4.Qb7#
                • 4.Qb5#
            • 3.Qxd6+
              • 3...Rb6
                • 4.Qxb6#
            • 3.Qxb3
              • threat
                • 4.Rxd6#
                • 4.Qb5#
                • 4.Qb7#
      • 1...Raa3
        • 2.Rd6
          • threat
            • 3.Qb7#
          • 2...Qc6+
            • 3.Rxc6+
              • 3...Rb6
                • 4.Qb5#
            • 3.Qxc6+
              • 3...Rb6
                • 4.Qb5#
                • 4.Qb7#
                • 4.Qxb6#
                • 4.Qc8#
          • 2...Qxd6
            • 3.Qxd6+
              • 3...Rb6
                • 4.Qxa3#
      • 1...Ra4
        • 2.Qd7
          • threat
            • 3.Qc8#
            • 3.Qa7#
            • 3.Qb7#
          • 2...Qxc6+
            • 3.Qxc6+
              • 3...Rb6
                • 4.Qxa4#
      • 1...Rbb1
        • 2.Qxd3+
          • 2...Sc4
            • 3.Qxc4+
              • 3...Rb5
                • 4.Qxb5#
      • 1...Rb2
        • 2.Qxd3+
          • 2...Sc4
            • 3.Qxc4+
              • 3...Rb5
                • 4.Qxb5#
      • 1...Rb4
        • 2.Rh7
          • threat
            • 3.Ra7#
          • 2...Qxc6+
            • 3.Qxc6+
              • 3...Ka5
                • 4.Ra7#
              • 3...Rb6
                • 4.Ra7#

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).