Problem Display
PID: 150313 (k1K5/2Rp4/p2Pp3/1pp2p2/5rp1/8/7b/3Q4 w - - 0 1)

Ott, Hans

Neue Zurcher Zeitung, 1950

k1K5/2Rp4/p2Pp3/1pp2p2/5rp1/8/7b/3Q4

#4

4 + 10


15158 Hans Ott Schachprobleme (Kummer) 1986

SOLUTION


  • SOUND
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qxc5
          • threat
            • 3.Ra7#
            • 3.Qa7#
      • 1...Rc4
        • 2.Qa3
          • threat
            • 3.Qxa6#
          • 2...Ra4
            • 3.Qxc5
              • threat
                • 4.Ra7#
                • 4.Qa7#
      • 1...Bg1
        • 2.Qa1
          • threat
            • 3.Qxa6#
          • 2...Ra4
            • 3.Qh8
              • threat
                • 4.Kxd7#
              • 3...Bd4
                • 4.Qh1#
          • 2...c4
            • 3.Qxa6+
              • 3...Ba7
                • 4.Rxa7#
                • 4.Qb7#
                • 4.Qxa7#
      • 1...c4
        • 2.Qa3
          • threat
            • 3.Qxa6#
          • 2...Bg1
            • 3.Qxa6+
              • 3...Ba7
                • 4.Rxa7#
                • 4.Qb7#
                • 4.Qxa7#
        • 2.Qe3
          • threat
            • 3.Ra7#
            • 3.Qa7#
          • 2...Rd4
            • 3.Qxd4
              • threat
                • 4.Ra7#
                • 4.Qa7#
        • 2.Qa1
          • threat
            • 3.Qxa6#
          • 2...Bg1
            • 3.Qxa6+
              • 3...Ba7
                • 4.Rxa7#
                • 4.Qb7#
                • 4.Qxa7#

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).