Problem Display
PID: 40933 (2K5/N7/1k6/8/8/8/1P6/Q7 w - - 0 1)

Speckmann, Werner

2nd Comm., Stella Polaris, 1966

2K5/N7/1k6/8/8/8/1P6/Q7

#3

4 + 1


SOLUTION


  • SOUND
  • Tries
    • 1.Kd7?
      • 1...Kb7
        • 2.Sc8
          • 2...Kb8
            • 3.Qa7#
      • 1...Kc5!
    • 1.Qd1?
      • 1...Ka5
        • 2.Qd6
          • 2...Ka4
            • 3.Qa3#
      • 1...Ka6
        • 2.Qb3
          • 2...Ka5
            • 3.Qb5#
          • 2...Kxa7
            • 3.Qb7#
        • 2.Qd8
          • 2...Kxa7
            • 3.Qa5#
      • 1...Kxa7
        • 2.Kc7
          • threat
            • 3.Qa4#
            • 3.Qa1#
          • 2...Ka6
            • 3.Qa4#
          • 2...Ka8
            • 3.Qa4#
            • 3.Qa1#
        • 2.Qd6
          • 2...Ka8
            • 3.Qa3#
            • 3.Qb8#
            • 3.Qa6#
      • 1...Kc5!
    • 1.Qe1?
      • 1...Ka6
        • 2.Kc7
          • 2...Kxa7
            • 3.Qa5#
            • 3.Qa1#
        • 2.Qb4
          • 2...Kxa7
            • 3.Qa5#
            • 3.Qb7#
      • 1...Kc5!
    • 1.Qf1?
      • threat
        • 2.Qb5+
          • 2...Kxa7
            • 3.Qa5#
            • 3.Qb7#
      • 1...Kxa7
        • 2.Kc7
          • 2...Ka8
            • 3.Qa6#
            • 3.Qa1#
        • 2.Qb5
          • 2...Ka8
            • 3.Qa4#
            • 3.Qa6#
            • 3.Qa5#
            • 3.Qb7#
            • 3.Qb8#
        • 2.Qf6
          • 2...Ka8
            • 3.Qa6#
      • 1...Kc5!
    • 1.Qh1?
      • threat
        • 2.Qc6+
          • 2...Ka5
            • 3.Qb5#
          • 2...Kxa7
            • 3.Qb7#
        • 2.b4
          • threat
            • 3.Qb7#
          • 2...Ka6
            • 3.Qb7#
          • 2...Kxa7
            • 3.Qb7#
      • 1...Ka5
        • 2.Qc6
          • 2...Kb4
            • 3.Qb5#
        • 2.Qb7
          • 2...Ka4
            • 3.Qb5#
      • 1...Ka6
        • 2.Qc6+
          • 2...Ka5
            • 3.Qb5#
          • 2...Kxa7
            • 3.Qb7#
        • 2.Qb7+
          • 2...Ka5
            • 3.Qb5#
        • 2.b4
          • threat
            • 3.Qb7#
          • 2...Kb6
            • 3.Qb7#
          • 2...Kxa7
            • 3.Qb7#
      • 1...Kc5!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc6+
          • 2...Ka5
            • 3.Qb5#
          • 2...Kxa7
            • 3.Qb7#
      • 1...Ka5
        • 2.Qc6
          • 2...Kb4
            • 3.Qb5#
      • 1...Ka6
        • 2.Qc6+
          • 2...Ka5
            • 3.Qb5#
          • 2...Kxa7
            • 3.Qb7#
      • 1...Kxa7
        • 2.Qh6
          • 2...Ka8
            • 3.Qa6#

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).