Problem Display
PID: 116222 (2b5/4p2n/3prp1K/4bk2/1P2Npp1/1PP1p3/1PN5/1B3n2 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

5th Prize, Lenin-100 MT (64 Shakhmatnoe obozrenie), 1970

2b5/4p2n/3prp1K/4bk2/1P2Npp1/1PP1p3/1PN5/1B3n2

#4

8 + 12


6490 yacpdb 2009

SOLUTION


  • SOUND
  • Keys
    • 1.c4!
      • threat
        • 2.Sd4+
          • 2...Bxd4
            • 3.Sxd6+
              • 3...Ke5
                • 4.Sf7#
        • 2.Sxd6+
          • 2...Bxd6
            • 3.Sd4+
              • 3...Ke5
                • 4.Sc6#
      • 1...Kxe4
        • 2.Se1+
          • 2...Kd4
            • 3.Bf5
              • threat
                • 4.Sc2#
      • 1...Bxb2
        • 2.Sd4+
          • 2...Ke5
            • 3.Sc6+
              • 3...Kf5
                • 4.Sg3#
                • 4.Sxd6#
          • 2...Bxd4
            • 3.Sxd6+
              • 3...Ke5
                • 4.Sf7#
      • 1...Bc3
        • 2.Sd4+
          • 2...Ke5
            • 3.Sc6+
              • 3...Kf5
                • 4.Sg3#
                • 4.Sxd6#
          • 2...Bxd4
            • 3.Sxd6+
              • 3...Ke5
                • 4.Sf7#
      • 1...Bd4
        • 2.Sxd4+
          • 2...Ke5
            • 3.Sc6+
              • 3...Kf5
                • 4.Sg3#
                • 4.Sxd6#
      • 1...f3
        • 2.Sxe3+
          • 2...Kf4
            • 3.Sd5+
              • 3...Kf5
                • 4.Sd2#
                • 4.Sf2#
                • 4.Sec3#
                • 4.Sg3#
                • 4.Sc5#
                • 4.Sg5#
                • 4.Sxd6#
                • 4.Sexf6#
          • 2...Sxe3
            • 3.Sg3+
              • 3...Kf4
                • 4.Sh5#
      • 1...g3
        • 2.Sf2
          • threat
            • 3.Sa1#
            • 3.Se1#
            • 3.Sa3#
            • 3.Sxe3#
            • 3.Sd4#
          • 2...Bxb2
            • 3.Sd4+
              • 3...Ke5
                • 4.Sf3#
                • 4.Sc6#
          • 2...Bc3
            • 3.Sd4+
              • 3...Ke5
                • 4.Sf3#
                • 4.Sc6#
          • 2...Bd4
            • 3.Sxe3+
              • 3...Ke5
                • 4.Sfg4#
                • 4.Seg4#
            • 3.Sxd4+
              • 3...Ke5
                • 4.Sf3#
                • 4.Sc6#
          • 2...f3
            • 3.Sxe3+
              • 3...Kf4
                • 4.Sd5#
      • 1...d5
        • 2.Sd4+
          • 2...Bxd4
            • 3.Sd6+
              • 3...Ke5
                • 4.Sf7#
        • 2.Sd6+
          • 2...Bxd6
            • 3.Sd4+
              • 3...Ke5
                • 4.Sc6#

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).