MESON Chess Problem Database

Problem Display
PID: 217501 (k2n4/rp6/3N3Q/7b/6pK/1n4B1/1pp4p/1qr4B w - - 0 1)

O'Keefe, John James

British Chess Magazine, 1931

k2n4/rp6/3N3Q/7b/6pK/1n4B1/1pp4p/1qr4B

#4

5 + 12

SOLUTION

  • SOUND
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sc7+
          • 2...Kb8
            • 3.Sd5+
              • 3...Ka8
                • 4.Sb6#
              • 3...Kc8
                • 4.Sb6#
        • 2.Qf4
          • threat
            • 3.Qb8#
          • 2...Sc6
            • 3.Qb8+
              • 3...Sxb8
                • 4.Sc7#
        • 2.Qd6
          • threat
            • 3.Qb8#
            • 3.Qxd8#
          • 2...Sc6
            • 3.Qb8+
              • 3...Sxb8
                • 4.Sc7#
      • 1...Ra1
        • 2.Qd6
          • threat
            • 3.Qb8#
            • 3.Qxd8#
          • 2...Sc6
            • 3.Qxc6
              • threat
                • 4.Qxb7#
                • 4.Qc8#
              • 3...bxc6
                • 4.Bxc6#
      • 1...Ra2
        • 2.Qd6
          • threat
            • 3.Qb8#
            • 3.Qxd8#
          • 2...Sc6
            • 3.Qxc6
              • threat
                • 4.Qxb7#
                • 4.Qc8#
              • 3...bxc6
                • 4.Bxc6#
      • 1...Ra3
        • 2.Qf8
          • threat
            • 3.Qxd8#
          • 2...Rd1
            • 3.Qxa3+
              • 3...Sa5
                • 4.Qxa5#
          • 2...Be8
            • 3.Qxa3+
              • 3...Sa5
                • 4.Qxa5#
        • 2.Qd6
          • threat
            • 3.Qb8#
            • 3.Qxd8#
          • 2...Sc6
            • 3.Qxc6
              • threat
                • 4.Qxb7#
                • 4.Qc8#
              • 3...bxc6
                • 4.Bxc6#
      • 1...Ra4
        • 2.Qd6
          • threat
            • 3.Qb8#
            • 3.Qxd8#
          • 2...Sc6
            • 3.Qxc6
              • threat
                • 4.Qxb7#
                • 4.Qc8#
              • 3...bxc6
                • 4.Bxc6#
      • 1...Ra5
        • 2.Qd6
          • threat
            • 3.Qb8#
            • 3.Qxd8#
          • 2...Sc6
            • 3.Qxc6
              • threat
                • 4.Qxb7#
                • 4.Qc8#
              • 3...Rxb5
                • 4.Qa6#
              • 3...bxc6
                • 4.Bxc6#
      • 1...Sc6
        • 2.Qf8+
          • 2...Be8
            • 3.Qxe8+
              • 3...Sb8
                • 4.Sc7#
                • 4.Qxb8#
              • 3...Sd8
                • 4.Qxd8#
        • 2.Qh8+
          • 2...Be8
            • 3.Qxe8+
              • 3...Sb8
                • 4.Sc7#
                • 4.Qxb8#
              • 3...Sd8
                • 4.Qxd8#

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