Problem Display
PID: 251118 (7n/8/k3p3/2Q5/1p6/pP6/N1P5/1K6 w - - 0 1)

Fomichev, Evgeny Vasilevich

Uralski Problemist, 2012

7n/8/k3p3/2Q5/1p6/pP6/N1P5/1K6

#5

5 + 5


SOLUTION


  • SOUND
  • Keys
    • 1.Qc7!
      • threat
        • 2.Sxb4+
          • 2...Kb5
            • 3.Sa2
              • threat
                • 4.c4+
                  • 4...Ka6
                    • 5.Sb4#
              • 3...Ka6
                • 4.c4
                  • threat
                    • 5.Sb4#
        • 2.c3
          • threat
            • 3.c4
              • threat
                • 4.Sxb4#
          • 2...bxc3
            • 3.Sb4+
              • 3...Kb5
                • 4.Qc6+
                  • 4...Kxb4
                    • 5.Qb6#
                  • 4...Ka5
                    • 5.Qc5#
        • 2.c4
          • threat
            • 3.Sxb4#
          • 2...bxc4 ep
            • 3.Sb4+
              • 3...Kb5
                • 4.Qc6+
                  • 4...Kxb4
                    • 5.Qb6#
                  • 4...Ka5
                    • 5.Qc5#
      • 1...Kb5
        • 2.Qd6
          • threat
            • 3.c4+
              • 3...Ka5
                • 4.Qc7+
                  • 4...Ka6
                    • 5.Sxb4#
                • 4.Qc6
                  • threat
                    • 5.Qb5#
                • 4.c5
                  • threat
                    • 5.Qb6#
                  • 4...Kb5
                    • 5.Qb6#
              • 3...bxc4 ep
                • 4.Sxc3+
                  • 4...Ka5
                    • 5.b4#
          • 2...Ka5
            • 3.Qc6
              • threat
                • 4.c3
                  • threat
                    • 5.cxb4#
                  • 4...bxc3
                    • 5.b4#
                • 4.c4
                  • threat
                    • 5.Qb5#
                  • 4...bxc4 ep
                    • 5.b4#
          • 2...Sf7
            • 3.c4+
              • 3...Ka5
                • 4.Qc7+
                  • 4...Ka6
                    • 5.Sxb4#
              • 3...bxc4 ep
                • 4.Sxc3+
                  • 4...Ka5
                    • 5.b4#

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).