Problem Display
PID: 181242 (8/1K6/4Q3/8/8/1p1p1Bp1/7k/1b6 w - - 0 1)

Howard, David M

Problem Observer, 2013

8/1K6/4Q3/8/8/1p1p1Bp1/7k/1b6

#3

3 + 5


SOLUTION


  • SOUND
  • Sets
    • 1...Kg1
      • 2.Qe1+
        • 2...Kh2
          • 3.Qh1#
    • 1...g2
      • 2.Qg4
        • threat
          • 3.Qxg2#
        • 2...Kg1
          • 3.Qxg2#
        • 2...Kh1
          • 3.Qxg2#
        • 2...g1Q
          • 3.Qh4#
        • 2...g1S
          • 3.Qg2#
        • 2...g1B
          • 3.Qg2#
          • 3.Qh4#
        • 2...g1R
          • 3.Qh4#
  • Tries
    • 1.Qh3+?
      • 1...Kg1
        • 2.Qg2#
      • 1...Kxh3!
    • 1.Qe1?
      • threat
        • 2.Qh1#
      • 1...Kh3
        • 2.Qh1#
      • 1...g2!
    • 1.Qe3?
      • threat
        • 2.Qd2+
          • 2...Kg1
            • 3.Qg2#
          • 2...Kh3
            • 3.Qh6#
          • 2...g2
            • 3.Qxg2#
      • 1...d2
        • 2.Qxd2+
          • 2...Kg1
            • 3.Qg2#
          • 2...Kh3
            • 3.Qh6#
          • 2...g2
            • 3.Qxg2#
      • 1...g2!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Qd5
          • threat
            • 3.Qh1#
            • 3.Qg2#
          • 2...Kg1
            • 3.Qg2#
          • 2...Kh3
            • 3.Qh5#
          • 2...g2
            • 3.Qxg2#
      • 1...Kg1
        • 2.Qe1+
          • 2...Kh2
            • 3.Qh1#
      • 1...g2
        • 2.Qg4
          • threat
            • 3.Qxg2#
          • 2...Kg1
            • 3.Qxg2#
          • 2...Kh1
            • 3.Qxg2#
          • 2...g1Q
            • 3.Qh4#
          • 2...g1S
            • 3.Qg2#
          • 2...g1B
            • 3.Qg2#
            • 3.Qh4#
          • 2...g1R
            • 3.Qh4#
      • 1...d2
        • 2.Qe2+
          • 2...Kg1
            • 3.Qg2#
          • 2...Kh3
            • 3.Qh5#
          • 2...g2
            • 3.Qxg2#

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).