Problem Display
PID: 176727 (k7/1r1N4/1p1K4/8/2p5/8/6Q1/8 w - - 0 1)

Barda, Olaf Martinius (AKA OM Olsen)

Schach-Echo, 1956

k7/1r1N4/1p1K4/8/2p5/8/6Q1/8

#3

3 + 4


6490 yacpdb 2018

SOLUTION


  • SOUND
  • Sets
    • 1...Ka7
      • 2.Qa2#
    • 1...c3
      • 2.Qg8+
        • 2...Ka7
          • 3.Qa2#
        • 2...Rb8
          • 3.Qxb8#
    • 1...b5
      • 2.Sc5
        • threat
          • 3.Qxb7#
        • 2...Ka7
          • 3.Qxb7#
        • 2...Kb8
          • 3.Qxb7#
  • Tries
    • 1.Ke6?
      • 1...b5
        • 2.Sc5
          • threat
            • 3.Qxb7#
          • 2...Ka7
            • 3.Qxb7#
          • 2...Kb8
            • 3.Qxb7#
      • 1...c3!
    • 1.Ke7?
      • 1...c3
        • 2.Qg8+
          • 2...Ka7
            • 3.Qa2#
          • 2...Rb8
            • 3.Qxb8#
      • 1...b5!
    • 1.Sc5?
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Kb8
        • 2.Qxb7#
      • 1...bxc5!
    • 1.Qf3?
      • 1...b5
        • 2.Sc5
          • threat
            • 3.Qxb7#
          • 2...Ka7
            • 3.Qxb7#
          • 2...Kb8
            • 3.Qxb7#
      • 1...c3!
    • 1.Qd5?
      • 1...c3
        • 2.Qg8+
          • 2...Ka7
            • 3.Qa2#
          • 2...Rb8
            • 3.Qxb8#
      • 1...b5
        • 2.Sc5
          • threat
            • 3.Qxb7#
          • 2...Ka7
            • 3.Qxb7#
          • 2...Kb8
            • 3.Qxb7#
      • 1...Ka7!
    • 1.Qc6?
      • 1...b5
        • 2.Sc5
          • threat
            • 3.Qxb7#
          • 2...Ka7
            • 3.Qxb7#
          • 2...Kb8
            • 3.Qxb7#
        • 2.Qa6+
          • 2...Ra7
            • 3.Qc8#
      • 1...c3!
    • 1.Qg8+?
      • 1...Rb8
        • 2.Qxb8#
      • 1...Ka7!
  • Keys
    • 1.Ke5!
      • 1...c3
        • 2.Qg8+
          • 2...Ka7
            • 3.Qa2#
          • 2...Rb8
            • 3.Qxb8#
      • 1...b5
        • 2.Sc5
          • threat
            • 3.Qxb7#
          • 2...Ka7
            • 3.Qxb7#
          • 2...Kb8
            • 3.Qxb7#

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).