Problem Display
PID: 134234 (3Q4/8/8/8/3K3p/4N2P/4p2P/4k3 w - - 0 1)

Pierce, William Timbrell

Chess Problems, 1873

3Q4/8/8/8/3K3p/4N2P/4p2P/4k3

#3

5 + 3


1829 The Theory of Pawn Promotion 1912

SOLUTION


  • SOUND
  • Tries
    • 1.Qb6?
      • 1...Kd2
        • 2.Qb1
          • threat
            • 3.Sc4#
          • 2...e1Q
            • 3.Qc2#
            • 3.Qb2#
          • 2...e1S
            • 3.Qd1#
          • 2...e1B
            • 3.Qc2#
            • 3.Qd1#
            • 3.Qb2#
          • 2...e1R
            • 3.Qc2#
            • 3.Qb2#
      • 1...Kf2!
    • 1.Qc7?
      • 1...Kd2
        • 2.Qc3#
      • 1...Kf2!
    • 1.Qd5?
      • 1...Kf2
        • 2.Qh1
          • threat
            • 3.Sg4#
          • 2...e1Q
            • 3.Qg2#
          • 2...e1S
            • 3.Qf1#
          • 2...e1B
            • 3.Qg2#
            • 3.Qf1#
          • 2...e1R
            • 3.Qg2#
      • 1...Kd2!
    • 1.Qb8?
      • 1...Kd2
        • 2.Qb1
          • threat
            • 3.Sc4#
          • 2...e1Q
            • 3.Qc2#
            • 3.Qb2#
          • 2...e1S
            • 3.Qd1#
          • 2...e1B
            • 3.Qc2#
            • 3.Qd1#
            • 3.Qb2#
          • 2...e1R
            • 3.Qc2#
            • 3.Qb2#
      • 1...Kf2!
    • 1.Qc8?
      • 1...Kd2
        • 2.Qc3#
      • 1...Kf2!
  • Keys
    • 1.Qa8!
      • 1...Kd2
        • 2.Qa1
          • threat
            • 3.Qc3#
          • 2...e1Q
            • 3.Qb2#
          • 2...e1S
            • 3.Qd1#
          • 2...e1B
            • 3.Qb2#
            • 3.Qd1#
          • 2...e1R
            • 3.Qb2#
      • 1...Kf2
        • 2.Qh1
          • threat
            • 3.Sg4#
          • 2...e1Q
            • 3.Qg2#
          • 2...e1S
            • 3.Qf1#
          • 2...e1B
            • 3.Qg2#
            • 3.Qf1#
          • 2...e1R
            • 3.Qg2#

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).