Problem Display
PID: 158668 (qb2QR2/r1p3p1/3pP3/p1P1kP2/R4p2/2Kp4/B1PNNr2/7b w - - 0 1)

Lubton, Yehuda

2/3 HM., The Problemist, 1982

qb2QR2/r1p3p1/3pP3/p1P1kP2/R4p2/2Kp4/B1PNNr2/7b

#3

11 + 12


721 Variantim 1989

SOLUTION


  • SOUND
  • Sets
    • 1...Rg2
      • 2.Rd4
        • threat
          • 3.Sc4#
        • 2...Qd5
          • 3.Rxd5#
        • 2...d5
          • 3.Sf3#
  • Tries
    • 1.Sxf4?
      • threat
        • 2.Sxd3#
        • 2.Sg6#
      • 1...dxc5
        • 2.Sxd3+
          • 2...Kd6
            • 3.Qd7#
        • 2.Sg6+
          • 2...Kd6
            • 3.Qd7#
      • 1...Rxf4!
    • 1.Qf7?
      • threat
        • 2.Qxg7#
      • 1...Qg2
        • 2.Re4+
          • 2...Qxe4
            • 3.Qxg7#
      • 1...Rg2
        • 2.Rd4
          • threat
            • 3.Sc4#
          • 2...Qd5
            • 3.Rxd5#
          • 2...d5
            • 3.Sf3#
      • 1...c6
        • 2.e7
          • threat
            • 3.Qe6#
            • 3.Qxg7#
          • 2...Rxe7
            • 3.Qxe7#
      • 1...dxc5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxg7#
      • 1...dxc5
        • 2.Sc4+
          • 2...Ke4
            • 3.Qxd3#
      • 1...Qg2
        • 2.Re4+
          • 2...Qxe4
            • 3.Qxg7#
      • 1...Rg2
        • 2.Rd4
          • threat
            • 3.Sc4#
          • 2...Qd5
            • 3.Rxd5#
          • 2...d5
            • 3.Sf3#
      • 1...c6
        • 2.cxd3
          • threat
            • 3.d4#
          • 2...dxc5
            • 3.Sc4#
          • 2...Rf3
            • 3.Re4#

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).