MESON Chess Problem Database

Problem Display
PID: 234325 (8/8/5q2/p1pN4/P1k2N2/1R2Pp2/2Pp1p2/3B1K2 w - - 0 1)

O'Keefe, John James

The Problemist, 1944

8/8/5q2/p1pN4/P1k2N2/1R2Pp2/2Pp1p2/3B1K2

#4

8 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Keys
    • 1.Ra3!
      • threat
        • 2.Rb3
          • 2...Qxf4
            • 3.Sb6#
          • 2...Qa1
            • 3.Sb6#
          • 2...Qb2
            • 3.Sb6#
          • 2...Qc3
            • 3.Sb6#
            • 3.Rxc3#
          • 2...Qd4
            • 3.Sb6#
          • 2...Qh4
            • 3.Sb6#
            • 3.Rc3#
          • 2...Qe5
            • 3.Sb6#
          • 2...Qg5
            • 3.Sb6#
            • 3.Rc3#
          • 2...Qe7
            • 3.Sb6#
            • 3.Rc3#
          • 2...Qg7
            • 3.Sb6#
          • 2...Qd8
            • 3.Rc3#
          • 2...Qh8
            • 3.Sb6#
          • 2...Qf5
            • 3.Sb6#
            • 3.Rc3#
          • 2...Qa6
            • 3.Rc3#
          • 2...Qb6
            • 3.Sxb6#
            • 3.Rc3#
          • 2...Qc6
            • 3.Rc3#
          • 2...Qd6
            • 3.Rc3#
          • 2...Qe6
            • 3.Rc3#
          • 2...Qg6
            • 3.Rc3#
          • 2...Qh6
            • 3.Rc3#
          • 2...Qf7
            • 3.Sb6#
            • 3.Rc3#
          • 2...Qf8
            • 3.Sb6#
            • 3.Rc3#
      • 1...Qb2
        • 2.Rd3
          • 2...Qxc2
            • 3.Sb6+
              • 3...Kb4
                • 4.Sfd5#
          • 2...Qa1
            • 3.Sb6+
              • 3...Kb4
                • 4.Sfd5#
                • 4.Rb3#
          • 2...Qa3
            • 3.Sb6+
              • 3...Kb4
                • 4.Sfd5#
          • 2...Qd4
            • 3.Sb6+
              • 3...Kb4
                • 4.Rb3#
          • 2...Qe5
            • 3.Sb6+
              • 3...Kb4
                • 4.Rb3#
          • 2...Qf6
            • 3.Rb3
              • 3...Qxf4
                • 4.Sb6#
              • 3...Qa1
                • 4.Sb6#
              • 3...Qb2
                • 4.Sb6#
              • 3...Qc3
                • 4.Sb6#
                • 4.Rxc3#
              • 3...Qd4
                • 4.Sb6#
              • 3...Qh4
                • 4.Sb6#
                • 4.Rc3#
              • 3...Qe5
                • 4.Sb6#
              • 3...Qg5
                • 4.Sb6#
                • 4.Rc3#
              • 3...Qe7
                • 4.Sb6#
                • 4.Rc3#
              • 3...Qg7
                • 4.Sb6#
              • 3...Qd8
                • 4.Rc3#
              • 3...Qh8
                • 4.Sb6#
              • 3...Qf5
                • 4.Sb6#
                • 4.Rc3#
              • 3...Qa6
                • 4.Rc3#
              • 3...Qb6
                • 4.Sxb6#
                • 4.Rc3#
              • 3...Qc6
                • 4.Rc3#
              • 3...Qd6
                • 4.Rc3#
              • 3...Qe6
                • 4.Rc3#
              • 3...Qg6
                • 4.Rc3#
              • 3...Qh6
                • 4.Rc3#
              • 3...Qf7
                • 4.Sb6#
                • 4.Rc3#
              • 3...Qf8
                • 4.Sb6#
                • 4.Rc3#
          • 2...Qg7
            • 3.Sb6+
              • 3...Kb4
                • 4.Sfd5#
                • 4.Rb3#
          • 2...Qh8
            • 3.Sb6+
              • 3...Kb4
                • 4.Sfd5#
                • 4.Rb3#
          • 2...Qb4
            • 3.Rb3
              • 3...Qxb3
                • 4.cxb3#
              • 3...Qxa4
                • 4.Sb6#
              • 3...Qa3
                • 4.Sb6#
              • 3...Qc3
                • 4.Sb6#
                • 4.Rxc3#
              • 3...Qb5
                • 4.Rc3#
              • 3...Qb6
                • 4.Sxb6#
                • 4.Rc3#
              • 3...Qb7
                • 4.Rc3#
              • 3...Qb8
                • 4.Rc3#

FEATURES

NOT CLASSIFIED
HTML5 logo

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).