Problem Display
PID: 34741 (7B/5p2/8/3K1p2/4p1p1/1P1p4/3P4/1k1B3R w - - 0 1)

Rudenko, Valentin Fedorovich

2nd Prize, Shakhmaty v SSSR, 1957

7B/5p2/8/3K1p2/4p1p1/1P1p4/3P4/1k1B3R

#4

6 + 6


SOLUTION


  • SOUND
  • Keys
    • 1.Bc3!
      • threat
        • 2.b4
          • threat
            • 3.Bb3#
          • 2...Ka2
            • 3.Ba4
              • threat
                • 4.Ra1#
              • 3...Ka3
                • 4.Ra1#
      • 1...Ka2
        • 2.Rh8
          • threat
            • 3.Ra8+
              • 3...Kb1
                • 4.Ra1#
          • 2...Kb1
            • 3.Ra8
              • threat
                • 4.Ra1#
              • 3...Kc1
                • 4.Ra1#
      • 1...e3
        • 2.b4
          • threat
            • 3.Bb3#
          • 2...Ka2
            • 3.Ba4
              • threat
                • 4.Ra1#
              • 3...Ka3
                • 4.Ra1#
          • 2...exd2
            • 3.Bb3+
              • 3...d1Q
                • 4.Rxd1#
              • 3...d1S
                • 4.Rxd1#
              • 3...d1B
                • 4.Rxd1#
              • 3...d1R
                • 4.Rxd1#
          • 2...e2
            • 3.Bb3+
              • 3...e1Q
                • 4.Rxe1#
              • 3...e1S
                • 4.Rxe1#
              • 3...e1B
                • 4.Rxe1#
              • 3...e1R
                • 4.Rxe1#
      • 1...g3
        • 2.Bh5+
          • 2...Ka2
            • 3.Ra1+
              • 3...Kxb3
                • 4.Bd1#
            • 3.Kc4
              • threat
                • 4.Ra1#
              • 3...Ka3
                • 4.Ra1#
          • 2...Kc2
            • 3.Ra1
              • threat
                • 4.Bd1#
              • 3...Kxb3
                • 4.Bd1#

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).