Problem Display
PID: 252720 (8/8/8/4K3/2p1Q3/2p5/3k4/R1b5 w - - 0 1)

de Jong, Leonard Nicholaas

Schackvarlden, 1931

8/8/8/4K3/2p1Q3/2p5/3k4/R1b5

#3

3 + 4


6490 yacpdb 2021

SOLUTION


  • SOUND
  • Tries
    • 1.Kd4?
      • 1...c2
        • 2.Qe3+
          • 2...Kd1
            • 3.Rxc1#
      • 1...Kd1!
    • 1.Rxc1?
      • threat
        • 2.Re1
          • 2...c2
            • 3.Qe3#
        • 2.Rc2+
          • 2...Kd1
            • 3.Qe2#
        • 2.Qe1+
          • 2...Kd3
            • 3.Rxc3#
      • 1...c2
        • 2.Rxc2+
          • 2...Kd1
            • 3.Qe2#
      • 1...Kxc1!
    • 1.Ra2+?
      • 1...c2
        • 2.Rxc2+
          • 2...Kd1
            • 3.Qe2#
        • 2.Qxc2+
          • 2...Ke1
            • 3.Qxc1#
            • 3.Qe2#
          • 2...Ke3
            • 3.Qe4#
            • 3.Qe2#
            • 3.Qc3#
      • 1...Bb2!
  • Keys
    • 1.Kf4!
      • 1...Kd1+
        • 2.Kf3
          • threat
            • 3.Qe2#
          • 2...Kd2
            • 3.Qe2#
      • 1...c2
        • 2.Qe3+
          • 2...Kd1
            • 3.Rxc1#
      • 1...Bb2
        • 2.Re1
          • threat
            • 3.Qe2#
          • 2...c2
            • 3.Qe3#
        • 2.Qg2+
          • 2...Kd3
            • 3.Rd1#
        • 2.Qe1+
          • 2...Kc2
            • 3.Qd1#
          • 2...Kd3
            • 3.Qd1#
        • 2.Qd4+
          • 2...Kc2
            • 3.Qd1#
          • 2...Ke2
            • 3.Qe3#
      • 1...Ba3
        • 2.Kf3
          • threat
            • 3.Qe2#
          • 2...c2
            • 3.Qe3#
            • 3.Qd4#
        • 2.Qg2+
          • 2...Kd3
            • 3.Rd1#

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).