Problem Display
PID: 141637 (8/1p3Q2/pP1P4/4pp2/B4k2/1p5p/7K/3N4 w - - 0 1)

Petrasinovic, Petrasin

The Problemist, 2011

8/1p3Q2/pP1P4/4pp2/B4k2/1p5p/7K/3N4

#4

6 + 7


SOLUTION


  • SOUND
  • Keys
    • 1.Be8!
      • threat
        • 2.Qxb3
          • threat
            • 3.Qe3+
              • 3...Kg4
                • 4.Qg3#
          • 2...Ke4
            • 3.Qc4+
              • 3...Kf3
                • 4.Bh5#
          • 2...Kg5
            • 3.Qg3+
              • 3...Kf6
                • 4.Qg6#
              • 3...Kh6
                • 4.Qg6#
      • 1...Kf3
        • 2.Qxb3+
          • 2...Ke2
            • 3.Qe3+
              • 3...Kxd1
                • 4.Ba4#
              • 3...Kf1
                • 4.Qf2#
          • 2...Ke4
            • 3.Qc4+
              • 3...Kf3
                • 4.Bh5#
          • 2...Kf4
            • 3.Qe3+
              • 3...Kg4
                • 4.Qg3#
      • 1...Kg4
        • 2.Qh5+
          • 2...Kf4
            • 3.Qh4+
              • 3...Kf3
                • 4.Bh5#
      • 1...Kg5
        • 2.Qh5+
          • 2...Kf4
            • 3.Qh4+
              • 3...Kf3
                • 4.Bh5#
      • 1...b2
        • 2.Qb3
          • threat
            • 3.Qe3+
              • 3...Kg4
                • 4.Qg3#
          • 2...Ke4
            • 3.Qc4+
              • 3...Kf3
                • 4.Bh5#
          • 2...Kg5
            • 3.Qg3+
              • 3...Kf6
                • 4.Qg6#
              • 3...Kh6
                • 4.Qg6#
      • 1...e4
        • 2.Qg7
          • threat
            • 3.Qg3#
          • 2...Kf3
            • 3.Bh5+
              • 3...Kf4
                • 4.Qg3#
          • 2...e3
            • 3.Sc3
              • threat
                • 4.Qg3#
              • 3...Kf3
                • 4.Qg3#

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).