Problem Display
PID: 209481 (3K4/1p3pp1/2ppp3/3k4/7Q/N6N/8/8 w - - 0 1)

Lukashev, Viktor Sergeevich

Suomen Shakki, 1991

3K4/1p3pp1/2ppp3/3k4/7Q/N6N/8/8

#4

4 + 7


SOLUTION


  • SOUND
  • Keys
    • 1.Sf2!
      • threat
        • 2.Qe4+
          • 2...Kc5
            • 3.Kc7
              • threat
                • 4.Sd3#
                • 4.Qc4#
      • 1...Kc5
        • 2.Kc7
          • threat
            • 3.Qc4#
          • 2...Kd5
            • 3.Qe4+
              • 3...Kc5
                • 4.Sd3#
                • 4.Qc4#
            • 3.Qf4
              • threat
                • 4.Qxd6#
              • 3...Kc5
                • 4.Qxd6#
                • 4.Qc4#
              • 3...e5
                • 4.Qc4#
          • 2...b5
            • 3.Qe4
              • threat
                • 4.Sd3#
      • 1...Ke5
        • 2.Ke7
          • threat
            • 3.Qe4#
          • 2...Kd5
            • 3.Qc4+
              • 3...Ke5
                • 4.Qe4#
            • 3.Qb4
              • threat
                • 4.Qxd6#
              • 3...Ke5
                • 4.Qe4#
              • 3...c5
                • 4.Qe4#
          • 2...Kf5
            • 3.Qg4+
              • 3...Ke5
                • 4.Qe4#
          • 2...d5
            • 3.Sc4+
              • 3...Kf5
                • 4.Qg4#
              • 3...dxc4
                • 4.Qe4#
            • 3.Qg4
              • threat
                • 4.Sd3#
              • 3...d4
                • 4.Qe4#
          • 2...f5
            • 3.Sd3+
              • 3...Kd5
                • 4.Qc4#
            • 3.Qc4
              • threat
                • 4.Sd3#
              • 3...f4
                • 4.Qe4#
      • 1...b5
        • 2.Qe4+
          • 2...Kc5
            • 3.Kc7
              • threat
                • 4.Sd3#
      • 1...f5
        • 2.Qc4+
          • 2...Ke5
            • 3.Ke7
              • threat
                • 4.Sd3#
              • 3...f4
                • 4.Qe4#

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).