Problem Display
PID: 20100 (5R2/8/1pp5/8/1Q6/1p2k3/8/5K2 w - - 0 1)

Knotek, Ladislav

Prager Presse, 1927

5R2/8/1pp5/8/1Q6/1p2k3/8/5K2

#4

3 + 4


SOLUTION


  • COOKED
  • Keys
    • 1.Rf2!
      • threat
        • 2.Qf4+
          • 2...Kd3
            • 3.Rd2+
              • 3...Kc3
                • 4.Qd4#
        • 2.Rb2
          • threat
            • 3.Rxb3#
          • 2...Kd3
            • 3.Kf2
              • threat
                • 4.Rd2#
      • 1...Kd3
        • 2.Rd2+
          • 2...Ke3
            • 3.Qd4+
              • 3...Kf3
                • 4.Rd3#
            • 3.Rd4
              • threat
                • 4.Qc3#
              • 3...Kf3
                • 4.Rd3#
                • 4.Qc3#
                • 4.Qxb3#
      • 1...b2
        • 2.Rxb2
          • threat
            • 3.Rb3#
          • 2...Kd3
            • 3.Kf2
              • threat
                • 4.Rd2#
      • 1...c5
        • 2.Qc4
          • threat
            • 3.Kg2
              • threat
                • 4.Re2#
            • 3.Qd5
              • threat
                • 4.Rf3#
    • 1.Rd8!
      • threat
        • 2.Rd4
          • threat
            • 3.Qc3#
          • 2...Kf3
            • 3.Rd3#
            • 3.Qc3#
            • 3.Qxb3#
        • 2.Qc4
          • threat
            • 3.Rd3#
          • 2...Kf3
            • 3.Rd3#
      • 1...b2
        • 2.Kg2
          • threat
            • 3.Qd4+
              • 3...Ke2
                • 4.Re8#
                • 4.Qf2#
                • 4.Qe5#
                • 4.Qd2#
                • 4.Qe4#
            • 3.Qg4
              • threat
                • 4.Qf3#
          • 2...b1Q
            • 3.Qd4+
              • 3...Ke2
                • 4.Qf2#
                • 4.Qd2#
          • 2...b1S
            • 3.Qd4+
              • 3...Ke2
                • 4.Re8#
                • 4.Qf2#
                • 4.Qe5#
                • 4.Qe4#
          • 2...b1B
            • 3.Qd4+
              • 3...Ke2
                • 4.Qf2#
                • 4.Qd2#

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).