Problem Display
PID: 44188 (1r2n2q/3r4/5N2/p2p4/P1k5/1RPN4/2KP4/8 w - - 0 1)

Bird, HE

Scientific American, 0000

1r2n2q/3r4/5N2/p2p4/P1k5/1RPN4/2KP4/8

#4

7 + 7


135 The Westminster Papers 1877

SOLUTION


  • SOUND
  • Keys
    • 1.Rb6!
      • threat
        • 2.Rc6#
      • 1...Qxf6
        • 2.Se5+
          • 2...Kc5
            • 3.Sxd7+
              • 3...Kc4
                • 4.d3#
      • 1...Rxb6
        • 2.Sxd7
          • threat
            • 3.Sxb6#
          • 2...Qxc3+
            • 3.dxc3
              • threat
                • 4.S3e5#
                • 4.S7e5#
                • 4.Sxb6#
              • 3...Rb2+
                • 4.Sxb2#
              • 3...Re6
                • 4.Sb2#
          • 2...Qd4
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
          • 2...Qf6
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
          • 2...Rb1
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
          • 2...Rb3
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
          • 2...Rb4
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
          • 2...Rb5
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
          • 2...Rb7
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
          • 2...Rb8
            • 3.S3e5+
              • 3...Qxe5
                • 4.d3#
      • 1...Rd6
        • 2.Se5+
          • 2...Kc5
            • 3.Sfd7+
              • 3...Rxd7
                • 4.Rc6#
      • 1...Rc7
        • 2.Se5+
          • 2...Kc5
            • 3.Sfd7+
              • 3...Rxd7
                • 4.Rc6#

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).