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Problem Display

PID: 28129 (QBN5/5B2/2ppR3/2qn1k1p/4b2K/4Pp1P/8/1n6 w - - 0 1)

Goumondy, Claude

Deutsche Schachzeitung, 1987

QBN5/5B2/2ppR3/2qn1k1p/4b2K/4Pp1P/8/1n6

#3

8 + 9

SOLUTION

SOUND
Sets
- 1...Qd4
  - 2.Sxd6#
- 1...Qb6
  - 2.Sxd6#
- 1...Qa7
  - 2.Sxd6#
- 1...Qc1
  - 2.Sxd6#
- 1...Qc2
  - 2.Sxd6#
- 1...Qc3
  - 2.Sxd6#
- 1...Qc4
  - 2.Sxd6#
- 1...Qa5
  - 2.Sxd6#
- 1...Qb5
  - 2.Sxd6#
- 1...Sc3
  - 2.Se7#
- 1...Sb4
  - 2.Se7#
- 1...Sf4
  - 2.Se7#
- 1...Sb6
  - 2.Se7#
- 1...Sf6
  - 2.Se7#
- 1...Sc7
  - 2.Se7#
- 1...Se7
  - 2.Sxe7#
Tries
- 1.Qa1?
  - threat
    - 2.Se7+
      - 2...Sxe7
        3.Rf6#
        3.Qf6#
    - 2.Rf6+
      - 2...Sxf6
        3.Se7#
    - 2.Qf6+
      - 2...Sxf6
        3.Se7#
  - 1...Qxe3
    - 2.Sxd6+
      - 2...Kf4
        3.Qe5#
    - 2.Se7+
      - 2...Kf4
        3.Bxd6#
      - 2...Sxe7
        3.Rf6#
        3.Qf6#
  - 1...Bc2
    - 2.Se7+
      - 2...Sxe7
        3.Qf6#
    - 2.Qf6+
      - 2...Sxf6
        3.Se7#
  - 1...Bd3
    - 2.Se7+
      - 2...Sxe7
        3.Qf6#
    - 2.Qf6+
      - 2...Sxf6
        3.Se7#
  - 1...Sbc3!
Keys
- 1.Qa5!
  - threat
    - 2.Qxc5
      - threat
        3.Sxd6#
        3.Se7#
      - 2...dxc5
        3.Sd6#
  - 1...Qxe3
    - 2.Se7+
      - 2...Kf4
        3.Bxd6#
  - 1...Sxe3
    - 2.Sxd6+
      - 2...Kf4
        3.Rxe4#
  - 1...Bc2
    - 2.Qxc5
      - threat
        3.Sxd6#
        3.Se7#
        3.Qxc2#
      - 2...dxc5
        3.Sd6#

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