Problem Display
PID: 186215 (2Q5/2n2N2/p1p5/2P1N2R/Pk6/1P6/K7/4b3 w - - 0 1)

Petrov, Evgeny Aleksandrovich

Suomen Shakki, 1981

2Q5/2n2N2/p1p5/2P1N2R/Pk6/1P6/K7/4b3

#3

8 + 5


SOLUTION


  • SOUND
  • Sets
    • 1...Ka5
      • 2.Sxc6#
    • 1...Bc3
      • 2.Sxc6#
  • Tries
    • 1.Sd3+?
      • 1...Ka5
        • 2.Qxc7#
      • 1...Kc3!
    • 1.Qg4+?
      • 1...Ka5
        • 2.Sxc6#
      • 1...Kxc5
        • 2.Sd7#
      • 1...Kc3!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qd4+
          • 2...Ka5
            • 3.Sxc6#
      • 1...Kc3
        • 2.Qd3+
          • 2...Kb4
            • 3.Sxc6#
      • 1...Kxc5
        • 2.Sd3+
          • 2...Kb6
            • 3.Qb8#
      • 1...Sb5
        • 2.Qa5+
          • 2...Kxa5
            • 3.Sxc6#
          • 2...Kxc5
            • 3.Sf3#
      • 1...Bd2
        • 2.Qxd2+
          • 2...Kxc5
            • 3.Sd7#
        • 2.Qd4+
          • 2...Ka5
            • 3.Sxc6#
            • 3.Qxd2#
      • 1...Bf2
        • 2.Qd2+
          • 2...Kxc5
            • 3.Sd7#
      • 1...Bg3
        • 2.Qd2+
          • 2...Kxc5
            • 3.Sd7#
        • 2.Qd4+
          • 2...Ka5
            • 3.Sxc6#
            • 3.Qc3#
            • 3.Qd2#
      • 1...Bh4
        • 2.Rxh4+
          • 2...Kc3
            • 3.Rc4#
            • 3.Qd3#
          • 2...Ka5
            • 3.Sxc6#
            • 3.Qxc7#
            • 3.Qd2#
          • 2...Kxc5
            • 3.Qd4#
        • 2.Qd2+
          • 2...Kxc5
            • 3.Sd7#
        • 2.Qd4+
          • 2...Ka5
            • 3.Sxc6#
            • 3.Qc3#
            • 3.Qd2#
      • 1...Sd5
        • 2.Qa5+
          • 2...Kxa5
            • 3.Sxc6#
      • 1...Se6
        • 2.Qa5+
          • 2...Kxa5
            • 3.Sxc6#

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).