Problem Display
PID: 276793 (8/5p2/2p1kNp1/p1B4p/r2PK1pP/3BR3/2b5/5R2 w - - 0 1)

Valve, Leo Erland

Stella Polaris, 1971

8/5p2/2p1kNp1/p1B4p/r2PK1pP/3BR3/2b5/5R2

#3

8 + 9


SOLUTION


  • SOUND
  • Sets
    • 1...Ra1
      • 2.d5+
        • 2...cxd5+
          • 3.Kd4#
    • 1...Ra2
      • 2.d5+
        • 2...cxd5+
          • 3.Kd4#
    • 1...Ra3
      • 2.d5+
        • 2...cxd5+
          • 3.Kd4#
    • 1...Rb4
      • 2.Bxc2
        • threat
          • 3.Kd3#
        • 2...Rxd4+
          • 3.Kxd4#
        • 2...Rb3
          • 3.Bxb3#
    • 1...Rxd4+
      • 2.Kxd4#
    • 1...Bd1
      • 2.Bc4+
        • 2...Rxc4
          • 3.Kd3#
    • 1...Bxd3+
      • 2.Kxd3#
    • 1...g5
      • 2.hxg5
        • threat
          • 3.Kf4#
        • 2...Rxd4+
          • 3.Kxd4#
        • 2...Bxd3+
          • 3.Kxd3#
  • Tries
    • 1.Bxc2?
      • threat
        • 2.Kd3#
      • 1...Rxd4+
        • 2.Kxd4#
      • 1...Ra3!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Kf4+
          • 2...Kxf6
            • 3.Kg3#
      • 1...Ra1
        • 2.d5+
          • 2...cxd5+
            • 3.Kd4#
      • 1...Bd1
        • 2.Bc4+
          • 2...Rxc4
            • 3.Kd3#
      • 1...g3
        • 2.Kf3+
          • 2...Kxf6
            • 3.Ke2#
            • 3.Kg2#
            • 3.Kxg3#
        • 2.Kf4+
          • 2...Kxf6
            • 3.Kxg3#
      • 1...g5
        • 2.hxg5
          • threat
            • 3.Kf4#
          • 2...Rxd4+
            • 3.Kxd4#
          • 2...Bxd3+
            • 3.Kxd3#

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).