Problem Display
PID: 205977 (4k3/2pp4/3p1K2/3R3p/2Pp1p2/4b1p1/6R1/2q4r w - - 0 1)

de Jong, Leonard Nicholaas

Deutsche Schachzeitung, 1929

4k3/2pp4/3p1K2/3R3p/2Pp1p2/4b1p1/6R1/2q4r

#4

4 + 11


6490 yacpdb 2020

SOLUTION


  • SOUND
  • Keys
    • 1.Ra5!
      • threat
        • 2.Ra8#
      • 1...Qa3
        • 2.Rxa3
          • threat
            • 3.Ra8#
          • 2...Ra1
            • 3.Rxa1
              • threat
                • 4.Ra8#
              • 3...Kd8
                • 4.Ra8#
              • 3...Kf8
                • 4.Ra8#
            • 3.Rb2
              • threat
                • 4.Rb8#
              • 3...Kd8
                • 4.Rb8#
              • 3...Kf8
                • 4.Rb8#
              • 3...Rb1
                • 4.Ra8#
          • 2...Rb1
            • 3.Ra8+
              • 3...Rb8
                • 4.Rxb8#
      • 1...Qa1
        • 2.Rb2
          • threat
            • 3.Rb8#
          • 2...Qxb2
            • 3.Ra8+
              • 3...Qb8
                • 4.Rxb8#
          • 2...Rb1
            • 3.Rxh5
              • threat
                • 4.Rh8#
              • 3...Kd8
                • 4.Rh8#
              • 3...Kf8
                • 4.Rh8#
              • 3...Rh1
                • 4.Rb8#
          • 2...d3
            • 3.Re5+
              • 3...Kd8
                • 4.Rb8#
              • 3...Kf8
                • 4.Rb8#
              • 3...dxe5
                • 4.Rb8#

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).