Problem Display
PID: 23409 (n4n2/2p5/2Np1Np1/R2P1pP1/p1k2p2/2Pp1B2/P2K4/5b2 w - - 0 1)

Hainsworth, AE

The Observer, 1961

n4n2/2p5/2Np1Np1/R2P1pP1/p1k2p2/2Pp1B2/P2K4/5b2

#3

9 + 11


SOLUTION


  • SOUND
  • Sets
    • 1...a3
      • 2.Bd1
        • threat
          • 3.Bb3#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sce5+
          • 2...dxe5
            • 3.Sxe5#
            • 3.Rc5#
        • 2.Sde5+
          • 2...dxe5
            • 3.Sxe5#
      • 1...Se6
        • 2.Sce5+
          • 2...dxe5
            • 3.Sxe5#
        • 2.Sde5+
          • 2...dxe5
            • 3.Sxe5#
      • 1...Sxd7!
  • Keys
    • 1.Sd4!
      • 1...Be2
        • 2.Sc2
          • threat
            • 3.Sa3#
          • 2...dxc2
            • 3.Bxe2#
          • 2...a3
            • 3.Sxa3#
      • 1...Bg2
        • 2.Sc2
          • threat
            • 3.Sa3#
          • 2...dxc2
            • 3.Be2#
          • 2...a3
            • 3.Sxa3#
      • 1...Bh3
        • 2.Sc2
          • threat
            • 3.Sa3#
          • 2...dxc2
            • 3.Be2#
          • 2...a3
            • 3.Sxa3#
      • 1...Sb6
        • 2.Sb5
          • threat
            • 3.Sa3#
          • 2...Kc5
            • 3.Sa3#
          • 2...a3
            • 3.Sxa3#
      • 1...Se6
        • 2.Rxa4+
          • 2...Kc5
            • 3.Sd7#
      • 1...Sd7
        • 2.Rxa4+
          • 2...Kc5
            • 3.Sxd7#
      • 1...Sh7
        • 2.Rxa4+
          • 2...Kc5
            • 3.Sd7#
      • 1...a3
        • 2.Bd1
          • threat
            • 3.Bb3#
      • 1...c6
        • 2.Se8
          • threat
            • 3.Sxd6#

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).