MESON Chess Problem Database

Problem Display
PID: 177265 (6b1/kpQ2p2/4p1p1/2K2R2/1p1pp3/1p6/8/8 w - - 0 1)

Sonnenfeld, Felix Alexander

Schach-Echo, 1972

6b1/kpQ2p2/4p1p1/2K2R2/1p1pp3/1p6/8/8

#4

3 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qa4+
          • 2...Kb8
            • 3.Kb6
              • threat
                • 4.Qe8#
              • 3...Kc8
                • 4.Qe8#
      • 1...f6
        • 2.Rxf6
          • threat
            • 3.Rf8
              • threat
                • 4.Qa4#
              • 3...Ka6
                • 4.Ra8#
                • 4.Qa4#
          • 2...Ka8
            • 3.Rf8+
              • 3...Ka7
                • 4.Qa4#
            • 3.Kb6
              • threat
                • 4.Rf8#
                • 4.Qc8#
                • 4.Qe8#
                • 4.Qxb7#
                • 4.Qd8#
              • 3...Kb8
                • 4.Rf8#
                • 4.Qe8#
                • 4.Qxb7#
                • 4.Qd8#
          • 2...Kb8
            • 3.Rf8+
              • 3...Ka7
                • 4.Qa4#
            • 3.Kb6
              • threat
                • 4.Rf8#
                • 4.Qe8#
                • 4.Qxb7#
                • 4.Qd8#
              • 3...Ka8
                • 4.Rf8#
                • 4.Qc8#
                • 4.Qe8#
                • 4.Qxb7#
                • 4.Qd8#
          • 2...Bf7
            • 3.Rxf7
              • threat
                • 4.Qxb7#
              • 3...Ka6
                • 4.Qa4#
              • 3...Ka8
                • 4.Qxb7#
              • 3...Kb8
                • 4.Qxb7#
          • 2...e5
            • 3.Ra6+
              • 3...Kxa6
                • 4.Qa4#
              • 3...Kb8
                • 4.Qd8#

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