Problem Display
PID: 95773 (5Q2/N2p4/3p1K2/8/2k5/8/1PB5/8 w - - 0 1)

Knotek, Ladislav

L'Italia Scacchistica, 1949

5Q2/N2p4/3p1K2/8/2k5/8/1PB5/8

#4

5 + 3


6490 yacpdb 2009

SOLUTION


  • SOUND
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qxd6
          • 2...Kxb5
            • 3.b4
              • 3...Kc4
                • 4.Qc5#
      • 1...Kb4
        • 2.Qxd6+
          • 2...Ka5
            • 3.Bd3
              • 3...Ka4
                • 4.Qa3#
          • 2...Kxb5
            • 3.b4
              • 3...Kc4
                • 4.Qc5#
        • 2.Bd3
          • 2...Kb3
            • 3.Qxd6
              • threat
                • 4.Qa3#
              • 3...Ka2
                • 4.Qa3#
              • 3...Kxb2
                • 4.Qa3#
              • 3...Ka4
                • 4.Qa3#
            • 3.Qa8
              • threat
                • 4.Qa3#
              • 3...Kxb2
                • 4.Qa3#
              • 3...Kb4
                • 4.Qa3#
          • 2...Ka4
            • 3.Qa8+
              • 3...Kb3
                • 4.Qa3#
              • 3...Kb4
                • 4.Qa3#
          • 2...Ka5
            • 3.Qxd6
              • 3...Ka4
                • 4.Qa3#
      • 1...Kxb5
        • 2.Qxd6
          • threat
            • 3.b4
              • 3...Kc4
                • 4.Qc5#
          • 2...Kc4
            • 3.Bd3+
              • 3...Kb3
                • 4.Qa3#
          • 2...Ka5
            • 3.Bd3
              • 3...Ka4
                • 4.Qa3#
      • 1...Kc5
        • 2.Qxd6+
          • 2...Kxb5
            • 3.b4
              • 3...Kc4
                • 4.Qc5#
      • 1...d5
        • 2.Sa3+
          • 2...Kd4
            • 3.Qe7
              • 3...d6
                • 4.Qa7#

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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).