Problem Display
PID: 203872 (2b3nK/3p4/3P1pkp/5R2/Q1P5/5BP1/1b3P2/8 w - - 0 1)

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

4th Prize, Shakhmaty, 1924

2b3nK/3p4/3P1pkp/5R2/Q1P5/5BP1/1b3P2/8

#3

8 + 7


6490 yacpdb 2020

SOLUTION


  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qxd7
        • threat
          • 3.Bh5#
          • 3.Qh7#
    • 1...Bb7
      • 2.Qxd7
        • threat
          • 3.Bh5#
          • 3.Qh7#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Bh5#
      • 1...h5
        • 2.Bxh5+
          • 2...Kh6
            • 3.Qd2#
      • 1...Kf7!
    • 1.Qxd7?
      • threat
        • 2.Bh5#
        • 2.Qh7#
      • 1...Se7
        • 2.Bh5#
      • 1...h5
        • 2.Qh7#
      • 1...Bxd7!
    • 1.Qa5?
      • threat
        • 2.Bh5#
      • 1...Kf7
        • 2.Bh5+
          • 2...Ke6
            • 3.Qd5#
          • 2...Kf8
            • 3.Qd8#
        • 2.Qd5+
          • 2...Kg6
            • 3.Bh5#
          • 2...Ke8
            • 3.Qxg8#
          • 2...Kf8
            • 3.Qxg8#
      • 1...h5
        • 2.Bxh5+
          • 2...Kh6
            • 3.Qd2#
      • 1...Be5!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Bd5
          • threat
            • 3.Qg4#
            • 3.Qh5#
          • 2...Kxf5
            • 3.Qh5#
          • 2...h5
            • 3.Qxh5#
      • 1...Kxf5
        • 2.Be4+
          • 2...Kxe4
            • 3.Qd5#
          • 2...Ke5
            • 3.Qd5#
          • 2...Kg5
            • 3.f4#
          • 2...Ke6
            • 3.Qd5#
      • 1...Kf7
        • 2.Qd5+
          • 2...Kg6
            • 3.Bh5#
          • 2...Ke8
            • 3.Qxg8#
          • 2...Kf8
            • 3.Qxg8#
      • 1...h5
        • 2.Bd5
          • threat
            • 3.Qxh5#
          • 2...Kxf5
            • 3.Qxh5#
          • 2...Kh6
            • 3.Qxh5#
          • 2...h4
            • 3.Qh5#
      • 1...Bc1
        • 2.Bh5+
          • 2...Kxf5
            • 3.Qd5#

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).