Problem Display
PID: 75455 (4n3/1P4p1/1K1p3b/1N1kp3/1p1n4/N4P1Q/1P1qP3/3Rr3 w - - 0 1)

Isaev, Leonid Antonovich

Weekly Westminster, 1925

(First published on Sat Oct 10 1925)

4n3/1P4p1/1K1p3b/1N1kp3/1p1n4/N4P1Q/1P1qP3/3Rr3

#3

9 + 10


SOLUTION


  • SOUND
  • Sets
    • 1...Qc1
      • 2.Rxd4+
        • 2...exd4
          • 3.Qf5#
    • 1...Rxd1
      • 2.e4#
    • 1...Rf1
      • 2.e4#
    • 1...Rg1
      • 2.e4#
    • 1...Rh1
      • 2.e4#
    • 1...Sf6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxd6+
          • 2...Sxd6
            • 3.Sc7#
      • 1...Sxf3
        • 2.Qf7+
          • 2...Ke4
            • 3.Qxf3#
      • 1...Sxb5
        • 2.Qf7+
          • 2...Kd4
            • 3.Sc2#
      • 1...bxa3
        • 2.Sc3+
          • 2...Kc4
            • 3.Qa4#
          • 2...Qxc3
            • 3.Qf7#
      • 1...e4
        • 2.Qf7+
          • 2...Ke5
            • 3.Sc4#
          • 2...Se6
            • 3.Qf5#

FEATURES


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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).