Problem Display
PID: 27550 (8/2K3p1/3Nk3/8/8/1P2p3/3P4/Q7 w - - 0 1)

Olausson, Michel

Problem Observer, 1993

8/2K3p1/3Nk3/8/8/1P2p3/3P4/Q7

#3

5 + 3


SOLUTION


  • SOUND
  • Sets
    • 1...Ke7
      • 2.Qe5+
        • 2...Kf8
          • 3.Qe8#
  • Tries
    • 1.Qxg7?
      • threat
        • 2.d4
          • threat
            • 3.Qe5#
            • 3.Qf7#
          • 2...Kd5
            • 3.Qe5#
      • 1...Kd5
        • 2.d4
          • threat
            • 3.Qe5#
          • 2...Ke6
            • 3.Qe5#
            • 3.Qf7#
      • 1...exd2!
    • 1.Qb1?
      • threat
        • 2.Qf5+
          • 2...Ke7
            • 3.Qf7#
      • 1...Kd5
        • 2.Qe4+
          • 2...Kc5
            • 3.Qc4#
            • 3.b4#
        • 2.Qf5+
          • 2...Kd4
            • 3.Sb5#
      • 1...Ke5
        • 2.Qf5+
          • 2...Kd4
            • 3.Sb5#
      • 1...Kf6
        • 2.Qf5+
          • 2...Ke7
            • 3.Qf7#
      • 1...Ke7
        • 2.Qf5
          • threat
            • 3.Qf7#
        • 2.Qg6
          • threat
            • 3.Qf7#
          • 2...Kf8
            • 3.Qf7#
            • 3.Qe8#
      • 1...g6!
    • 1.Qa5?
      • threat
        • 2.Qf5+
          • 2...Ke7
            • 3.Qf7#
      • 1...Kf6
        • 2.Qf5+
          • 2...Ke7
            • 3.Qf7#
      • 1...Ke7
        • 2.Qe5+
          • 2...Kf8
            • 3.Qe8#
        • 2.Qf5
          • threat
            • 3.Qf7#
      • 1...g6!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf5+
          • 2...Ke7
            • 3.Qf7#
        • 2.d4
          • threat
            • 3.Qf7#
          • 2...Kd5
            • 3.Qc4#
          • 2...Ke7
            • 3.Qf7#
      • 1...Kd5
        • 2.Qf5+
          • 2...Kd4
            • 3.Sb5#
      • 1...Ke5
        • 2.Qf5+
          • 2...Kd4
            • 3.Sb5#
      • 1...exd2
        • 2.Qf5+
          • 2...Ke7
            • 3.Qf7#
      • 1...e2
        • 2.Qf5+
          • 2...Ke7
            • 3.Qf7#
      • 1...g6
        • 2.d4
          • threat
            • 3.Qf7#
          • 2...Kd5
            • 3.Qc4#
          • 2...Ke7
            • 3.Qf7#

FEATURES


NOT CLASSIFIED


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).