Problem Display
PID: 53974 (5NQ1/8/8/3B4/P2k4/7p/5P1P/5K2 w - - 0 1)

Beers, William Alexander

The Chess Review, 1935

5NQ1/8/8/3B4/P2k4/7p/5P1P/5K2

#4

7 + 2


SOLUTION


  • SOUND
  • Keys
    • 1.Ba2!
      • 1...Kc3
        • 2.Qb3+
          • 2...Kd2
            • 3.Bb1
              • 3...Kc1
                • 4.Qc2#
        • 2.Ke1
          • threat
            • 3.Qb3+
              • 3...Kd4
                • 4.Qe3#
          • 2...Kb2
            • 3.Qb3+
              • 3...Ka1
                • 4.Qb1#
              • 3...Kc1
                • 4.Qb1#
                • 4.Qc3#
          • 2...Kc2
            • 3.Qb3+
              • 3...Kc1
                • 4.Qb1#
                • 4.Qc3#
          • 2...Kb4
            • 3.Qc4+
              • 3...Ka3
                • 4.Qb3#
              • 3...Ka5
                • 4.Qb5#
          • 2...Kd4
            • 3.Qd5+
              • 3...Kc3
                • 4.Qd2#
        • 2.Ke2
          • threat
            • 3.Qb3+
              • 3...Kd4
                • 4.Qe3#
          • 2...Kb2
            • 3.Qb3+
              • 3...Ka1
                • 4.Qb1#
              • 3...Kc1
                • 4.Qb1#
                • 4.Qc3#
          • 2...Kc2
            • 3.Qb3+
              • 3...Kc1
                • 4.Qb1#
                • 4.Qc3#
            • 3.Qg7
              • 3...Kc1
                • 4.Qc3#
            • 3.Qh8
              • 3...Kc1
                • 4.Qc3#
          • 2...Kb4
            • 3.Qc4+
              • 3...Ka3
                • 4.Qb3#
              • 3...Ka5
                • 4.Qb5#
          • 2...Kd4
            • 3.Qd5+
              • 3...Kc3
                • 4.Qd2#
      • 1...Kd3
        • 2.Qc4+
          • 2...Kd2
            • 3.Bb1
              • 3...Kd1
                • 4.Qc2#
      • 1...Ke4
        • 2.Qd5+
          • 2...Kf4
            • 3.Sg6+
              • 3...Kg4
                • 4.f3#
      • 1...Kc5
        • 2.Qe6
          • 2...Kb4
            • 3.Qc4+
              • 3...Ka3
                • 4.Qb3#
              • 3...Ka5
                • 4.Qb5#
      • 1...Ke5
        • 2.Qe6+
          • 2...Kf4
            • 3.Sh7
              • 3...Kf3
                • 4.Qf5#

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).