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Problem Display

PID: 60894 (1b6/4R3/1pP3NP/1P6/3P2p1/4B1k1/8/6NK w - - 0 1)

Lehn, Paul

Source?, 1919

1b6/4R3/1pP3NP/1P6/3P2p1/4B1k1/8/6NK

#3

9 + 4

797	Bulletin de la FFE	1928

SOLUTION

SOUND
Sets
- 1...Ba7
  - 2.Rf7
    - 2...Bb8
      - 3.Bf2#
  - 2.c7
    - 2...Bb8
      - 3.cxb8Q#
      - 3.cxb8B#
Tries
- 1.Bf4+?
  - 1...Bxf4
    - 2.Re2
      - threat
        3.Rg2#
  - 1...Kf2!
- 1.Rc7?
  - 1...Ba7
    - 2.Rf7
      - 2...Bb8
        3.Bf2#
  - 1...Bxc7!
- 1.c7?
  - threat
    - 2.cxb8Q#
    - 2.cxb8B#
  - 1...Ba7
    - 2.Re4
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.Re6
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.Rd7
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.Rf7
      - 2...Bb8
        3.Bf2#
        3.cxb8Q#
        3.cxb8B#
    - 2.Rg7
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.Rh7
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.Re8
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.d5
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.h7
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
    - 2.c8Q
      - 2...Bb8
        3.Qxb8#
  - 1...Bxc7!
Keys
- 1.Ra7!
  - threat
    - 2.Ra2
      - threat
        3.Bf2#
        3.Rg2#
  - 1...Bxa7
    - 2.c7
      - 2...Bb8
        3.cxb8Q#
        3.cxb8B#
  - 1...Bf4
    - 2.Ra2
      - threat
        3.Bf2#
        3.Bxf4#
        3.Rg2#

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