Problem Display
PID: 230733 (2k2n2/K1br1N1p/ppR2p2/p2RpB2/Pp2P3/2p5/8/8 w - - 0 1)

Kalinin, Aleksandr Konstantinovich

Shakhmatnaya kompozitsiya, 1992

2k2n2/K1br1N1p/ppR2p2/p2RpB2/Pp2P3/2p5/8/8

#4

7 + 12


SOLUTION


  • SOUND
  • Keys
    • 1.Rd1!
      • 1...c2
        • 2.Rxc2
          • threat
            • 3.Rxc7+
              • 3...Kxc7
                • 4.Rc1#
          • 2...Se6
            • 3.Bxe6
              • threat
                • 4.Bxd7#
      • 1...b3
        • 2.Rd3
          • threat
            • 3.Rxc7+
              • 3...Kxc7
                • 4.Rxc3#
          • 2...Se6
            • 3.Bxe6
              • threat
                • 4.Bxd7#
          • 2...c2
            • 3.Rxc7+
              • 3...Kxc7
                • 4.Rc3#
      • 1...b5
        • 2.Rd5
          • threat
            • 3.Rxc7+
              • 3...Kxc7
                • 4.Rc5#
          • 2...Se6
            • 3.Bxe6
              • threat
                • 4.Bxd7#
      • 1...h5
        • 2.Rg1
          • threat
            • 3.Rg8
              • threat
                • 4.Rxf8#
          • 2...Se6
            • 3.Rg8+
              • 3...Rd8
                • 4.Bxe6#
                • 4.Rxd8#
              • 3...Sd8
                • 4.Sd6#
                • 4.Rxd8#
              • 3...Sf8
                • 4.Rxf8#
            • 3.Bxe6
              • threat
                • 4.Rg8#
          • 2...Sg6
            • 3.Rxg6
              • threat
                • 4.Rg8#
          • 2...Sh7
            • 3.Rg8+
              • 3...Sf8
                • 4.Rxf8#
      • 1...h6
        • 2.Rg1
          • threat
            • 3.Rg8
              • threat
                • 4.Rxf8#
          • 2...Se6
            • 3.Rg8+
              • 3...Rd8
                • 4.Bxe6#
                • 4.Rxd8#
              • 3...Sd8
                • 4.Sd6#
                • 4.Rxd8#
              • 3...Sf8
                • 4.Rxf8#
            • 3.Bxe6
              • threat
                • 4.Rg8#
          • 2...Sg6
            • 3.Rxg6
              • threat
                • 4.Rg8#
          • 2...Sh7
            • 3.Rg8+
              • 3...Sf8
                • 4.Rxf8#

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).