Problem Display
PID: 88953 (k1B1n2K/2b5/1pNp1n2/2p5/p7/N7/1R6/8 w - - 0 1)

O'Neil, Robert

American Chess Problemist, 1950

k1B1n2K/2b5/1pNp1n2/2p5/p7/N7/1R6/8

#3

5 + 8


6490 yacpdb 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Bb8
      • 2.Rxb6
        • threat
          • 3.Bb7#
          • 3.Rxb8#
  • Tries
    • 1.Rxb6?
      • threat
        • 2.Bb7#
        • 2.Ra6#
      • 1...Bb8
        • 2.Bb7#
        • 2.Rxb8#
      • 1...Bxb6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.S4a5
          • threat
            • 3.Bb7#
        • 2.Rxb6
          • threat
            • 3.Bb7#
            • 3.Ra6#
          • 2...Bxb6
            • 3.Sxb6#
      • 1...Bd8
        • 2.S4a5
          • threat
            • 3.Bb7#
        • 2.Rxb6
          • threat
            • 3.Bb7#
            • 3.Ra6#
            • 3.Rb8#
          • 2...Bxb6
            • 3.Sxb6#
      • 1...Sd5
        • 2.S4a5
          • threat
            • 3.Bb7#
      • 1...Sd7
        • 2.S4a5
          • threat
            • 3.Bb7#
      • 1...b5
        • 2.Rxb5
          • threat
            • 3.Bb7#
          • 2...Bb6
            • 3.Sxb6#
      • 1...d5
        • 2.Rxb6
          • threat
            • 3.Bb7#
            • 3.Ra6#
          • 2...Bxb6
            • 3.Sxb6#

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