MESON Chess Problem Database

Problem Display
PID: 177290 (6K1/8/2p2R2/8/8/BpQpp2n/k2p3p/rr1N4 w - - 0 1)

Sonnenfeld, Felix Alexander

4th Prize, Schach-Echo, 1966

6K1/8/2p2R2/8/8/BpQpp2n/k2p3p/rr1N4

#4

5 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Keys
    • 1.Rf4!
      • threat
        • 2.Ra4
          • threat
            • 3.Bc1#
            • 3.Bb2#
            • 3.Bb4#
            • 3.Bc5#
            • 3.Bd6#
            • 3.Be7#
            • 3.Bf8#
          • 2...Rxd1
            • 3.Qb2#
          • 2...Rc1
            • 3.Qb2#
          • 2...Rb2
            • 3.Qxb2#
      • 1...Sxf4
        • 2.Bf8
          • threat
            • 3.Qa5#
          • 2...Rxd1
            • 3.Bg7
              • threat
                • 4.Qb2#
              • 3...Kb1
                • 4.Qb2#
              • 3...Ka3
                • 4.Qa5#
              • 3...Rab1
                • 4.Qa5#
              • 3...Rdb1
                • 4.Qa5#
              • 3...b2
                • 4.Qxb2#
      • 1...h1Q
        • 2.Qb2+
          • 2...Rxb2
            • 3.Sc3+
              • 3...Kxa3
                • 4.Ra4#
      • 1...h1B
        • 2.Qb2+
          • 2...Rxb2
            • 3.Sc3+
              • 3...Kxa3
                • 4.Ra4#
        • 2.Ra4
          • threat
            • 3.Bc1#
            • 3.Bb2#
            • 3.Bb4#
            • 3.Bc5#
            • 3.Bd6#
            • 3.Be7#
            • 3.Bf8#
          • 2...Bd5+
            • 3.Kg7
              • threat
                • 4.Bc1#
                • 4.Bb2#
                • 4.Bb4#
                • 4.Bc5#
                • 4.Bd6#
                • 4.Be7#
                • 4.Bf8#
              • 3...Rxd1
                • 4.Qb2#
              • 3...Rc1
                • 4.Qb2#
              • 3...Rb2
                • 4.Qxb2#
            • 3.Kf8
              • threat
                • 4.Bc1#
                • 4.Bb2#
                • 4.Bb4#
                • 4.Bc5#
                • 4.Bd6#
                • 4.Be7#
              • 3...Rxd1
                • 4.Qb2#
              • 3...Rc1
                • 4.Qb2#
              • 3...Rb2
                • 4.Qxb2#
            • 3.Kh8
              • threat
                • 4.Bc1#
                • 4.Bb2#
                • 4.Bb4#
                • 4.Bc5#
                • 4.Bd6#
                • 4.Be7#
                • 4.Bf8#
              • 3...Rxd1
                • 4.Qb2#
              • 3...Rc1
                • 4.Qb2#
              • 3...Rb2
                • 4.Qxb2#
      • 1...h1R
        • 2.Qb2+
          • 2...Rxb2
            • 3.Sc3+
              • 3...Kxa3
                • 4.Ra4#

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