Problem Display
PID: 33827 (7K/4R3/p2p2p1/p5PP/P2k1NpN/1P1B4/P2P1P1B/8 w - - 0 1)

Howard, David M

Problem Observer, 1990

7K/4R3/p2p2p1/p5PP/P2k1NpN/1P1B4/P2P1P1B/8

#3

13 + 6


SOLUTION


  • SOUND
  • Tries
    • 1.Bc4?
      • threat
        • 2.Se6+
          • 2...Ke4
            • 3.d3#
      • 1...g3
        • 2.Sd3
          • threat
            • 3.Sf3#
      • 1...Kc5!
    • 1.Rc7?
      • threat
        • 2.Rc4+
          • 2...Ke5
            • 3.Shxg6#
            • 3.Re4#
      • 1...Ke5
        • 2.Shxg6+
          • 2...Kd4
            • 3.Rc4#
      • 1...gxh5
        • 2.Sf5+
          • 2...Ke5
            • 3.Re7#
        • 2.Rc4+
          • 2...Ke5
            • 3.Shg6#
            • 3.Re4#
      • 1...d5!
    • 1.f3?
      • threat
        • 2.Bg1#
      • 1...gxf3
        • 2.Bg1+
          • 2...f2
            • 3.Bxf2#
        • 2.Rc7
          • threat
            • 3.Sxf3#
          • 2...Ke5
            • 3.Sxf3#
          • 2...f2
            • 3.Sf3#
      • 1...Kc5!
    • 1.b4?
      • threat
        • 2.Re4#
      • 1...d5
        • 2.Bg1
          • threat
            • 3.f3#
        • 2.Re3
          • threat
            • 3.Se2#
            • 3.Se6#
        • 2.Rd7
          • threat
            • 3.Rxd5#
          • 2...Ke5
            • 3.Rxd5#
        • 2.f3
          • threat
            • 3.Bg1#
          • 2...gxf3
            • 3.Sxf3#
      • 1...axb4!
  • Keys
    • 1.Be4!
      • 1...Kc5
        • 2.Se6+
          • 2...Kb4
            • 3.Bxd6#
          • 2...Kb6
            • 3.Rb7#
      • 1...gxh5
        • 2.Sd3
          • threat
            • 3.Sf5#
      • 1...g3
        • 2.Sd3
          • threat
            • 3.Sf3#
      • 1...d5
        • 2.Sd3
          • 2...dxe4
            • 3.Rd7#
          • 2...gxh5
            • 3.Sf5#
          • 2...g3
            • 3.Sf3#

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).