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Problem Display

PID: 115234 (k1N5/Bp2n3/8/7Q/8/5K2/8/8 w - - 0 1)

Breuer, Josef Johann

2nd HM., Schweizerische Arbeiter Schach Journal, 1954

k1N5/Bp2n3/8/7Q/8/5K2/8/8

#3

4 + 3

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Sf5
  - 2.Qxf5
    - 2...b5
      - 3.Qe4#
      - 3.Qd5#
    - 2...b6
      - 3.Qe4#
      - 3.Qd5#
- 1...Sg6
  - 2.Qxg6
    - 2...b5
      - 3.Qe4#
      - 3.Qc6#
    - 2...b6
      - 3.Qe4#
      - 3.Qc6#
- 1...Sg8
  - 2.Qh2
    - threat
      - 3.Qb8#
  - 2.Qe5
    - threat
      - 3.Qb8#
- 1...b5
  - 2.Qxb5
    - threat
      - 3.Qb8#
    - 2...Sc6
      - 3.Qxc6#
Keys
- 1.Qa5!
  - threat
    - 2.Sb6#
  - 1...Sxc8
    - 2.Bb6+
      - 2...Kb8
        3.Bc7#
      - 2...Sa7
        3.Qxa7#
  - 1...b5
    - 2.Qb6
      - threat
        3.Qb8#
      - 2...Sc6
        3.Qxc6#
    - 2.Qc7
      - threat
        3.Sb6#
        3.Qb8#
    - 2.Qxb5
      - threat
        3.Qb8#
      - 2...Sc6
        3.Qxc6#
  - 1...b6
    - 2.Qxb6
      - threat
        3.Qb8#
      - 2...Sc6
        3.Qxc6#
  - 1...Sd5
    - 2.Qa2
      - 2...b5
        3.Qxd5#
      - 2...b6
        3.Qxd5#
      - 2...Sc3
        3.Sb6#
      - 2...Se3
        3.Sb6#
      - 2...Sb4
        3.Sb6#
      - 2...Sf4
        3.Sb6#
      - 2...Sb6
        3.Sxb6#
      - 2...Sf6
        3.Sb6#
      - 2...Sc7
        3.Sb6#
      - 2...Se7
        3.Sb6#

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