Problem Display
PID: 133229 (8/Q4Ppk/1p4p1/3p1p2/bp1p1KP1/1p1P4/1P6/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Narodni Politika, 1908

8/Q4Ppk/1p4p1/3p1p2/bp1p1KP1/1p1P4/1P6/8

#3

6 + 10


1829 The Theory of Pawn Promotion 1912

SOLUTION


  • SOUND
  • Sets
    • 1...Kh8
      • 2.f8Q+
        • 2...Kh7
          • 3.Qfxg7#
          • 3.Qaxg7#
  • Tries
    • 1.Kg5?
      • threat
        • 2.Qb8
          • threat
            • 3.Qh2#
            • 3.Qg8#
      • 1...Kh8
        • 2.Kxg6
          • threat
            • 3.f8Q#
            • 3.f8R#
          • 2...Be8
            • 3.fxe8Q#
            • 3.fxe8R#
        • 2.Qb8+
          • 2...Kh7
            • 3.Qh2#
            • 3.Qg8#
          • 2...Be8
            • 3.Qh2#
        • 2.f8Q+
          • 2...Kh7
            • 3.Qfxg7#
            • 3.Qaxg7#
      • 1...Be8
        • 2.fxe8S
          • threat
            • 3.Qxg7#
          • 2...Kg8
            • 3.Qxg7#
          • 2...Kh8
            • 3.Qxg7#
      • 1...f4!
    • 1.Qb8?
      • threat
        • 2.Kg5
          • threat
            • 3.Qh2#
            • 3.Qg8#
        • 2.Qg8+
          • 2...Kh6
            • 3.Qh8#
      • 1...g5+
        • 2.Kxg5
          • threat
            • 3.Qh2#
            • 3.Qg8#
      • 1...Be8!
    • 1.Qe7?
      • threat
        • 2.Qh4#
      • 1...Kh6
        • 2.Qh4#
      • 1...Kh8
        • 2.Qh4#
      • 1...g5+!
  • Keys
    • 1.g5!
      • 1...Kh8
        • 2.f8Q+
          • 2...Kh7
            • 3.Qfxg7#
            • 3.Qaxg7#
      • 1...Bb5
        • 2.Qa1
          • threat
            • 3.Qh1#
          • 2...Kh8
            • 3.Qh1#
      • 1...Bc6
        • 2.Qa1
          • threat
            • 3.Qh1#
          • 2...Kh8
            • 3.Qh1#
      • 1...Bd7
        • 2.Qa1
          • threat
            • 3.Qh1#
          • 2...Kh8
            • 3.Qh1#
      • 1...Be8
        • 2.fxe8S
          • threat
            • 3.Qxg7#
          • 2...Kg8
            • 3.Qxg7#
          • 2...Kh8
            • 3.Qxg7#
      • 1...b5
        • 2.f8B
          • threat
            • 3.Qxg7#
          • 2...Kg8
            • 3.Qxg7#
          • 2...Kh8
            • 3.Qxg7#

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).