Problem Display
PID: 225997 (8/8/2Qp4/p2N2p1/3Np1P1/1p6/1p4p1/nk4K1 w - - 0 1)

Libich, Milos

Praca, 1958

8/8/2Qp4/p2N2p1/3Np1P1/1p6/1p4p1/nk4K1

#4

5 + 9


6490 yacpdb 2020

SOLUTION


  • SOUND
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qg3
          • threat
            • 3.Sc3+
              • 3...Kc1
                • 4.Qe1#
                • 4.Qe3#
          • 2...Ka2
            • 3.Sc3+
              • 3...Ka3
                • 4.Qxd6#
          • 2...Sc2
            • 3.Sc3+
              • 3...Ka1
                • 4.Sxb3#
              • 3...Kc1
                • 4.Sxb3#
          • 2...e3
            • 3.Sc3+
              • 3...Kc1
                • 4.Qe1#
                • 4.Qxe3#
      • 1...Ka2
        • 2.Qxb3+
          • 2...Kb1
            • 3.Sc3+
              • 3...Kc1
                • 4.Qd1#
          • 2...Sxb3
            • 3.Sc3+
              • 3...Ka1
                • 4.Sc2#
                • 4.Sxb3#
              • 3...Ka3
                • 4.Sc2#
      • 1...Sc2
        • 2.Qxc2+
          • 2...Ka1
            • 3.Sc3
              • threat
                • 4.Sxb3#
                • 4.Qb1#
              • 3...b1Q+
                • 4.Qxb1#
              • 3...b1R+
                • 4.Qxb1#
              • 3...bxc2
                • 4.Sxc2#
                • 4.Sb3#
          • 2...Ka2
            • 3.Sc3+
              • 3...Ka1
                • 4.Sxb3#
                • 4.Qb1#
              • 3...Ka3
                • 4.Qxb3#
          • 2...bxc2
            • 3.Sc3+
              • 3...Ka1
                • 4.Sxc2#
                • 4.Sb3#
              • 3...Kc1
                • 4.Sb3#
      • 1...e3
        • 2.Qxa5
          • 2...Sc2
            • 3.Sc3+
              • 3...Kc1
                • 4.Sxb3#
          • 2...e2
            • 3.Sc3+
              • 3...Kc1
                • 4.Qxg5#
      • 1...a4
        • 2.Qe1+
          • 2...Ka2
            • 3.Sb4+
              • 3...Ka3
                • 4.Sb5#

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).