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Problem Display

PID: 176947 (K1Q5/pp6/3pNN1p/r3n2p/5B1k/r5p1/2bR2P1/8 w - - 0 1)

Keller, Michael

Schach-Echo, 1976

K1Q5/pp6/3pNN1p/r3n2p/5B1k/r5p1/2bR2P1/8

#3

7 + 11

6490	yacpdb	2018

SOLUTION

SOUND
Sets
- 1...Ra2
  - 2.Sd4
    - threat
      - 3.Qh3#
    - 2...Bf5
      - 3.Sxf5#
    - 2...Sg4
      - 3.Sf3#
    - 2...Sd7
      - 3.Sf3#
- 1...Rd3
  - 2.Sf8
    - threat
      - 3.Qh3#
    - 2...Sg4
      - 3.Sg6#
    - 2...Sd7
      - 3.Sg6#
- 1...R3a4
  - 2.Sd4
    - threat
      - 3.Qh3#
    - 2...Bf5
      - 3.Sxf5#
    - 2...Sg4
      - 3.Sf3#
    - 2...Sd7
      - 3.Sf3#
- 1...Bd3
  - 2.Sd4
    - threat
      - 3.Qh3#
    - 2...Bf5
      - 3.Sxf5#
    - 2...Sg4
      - 3.Sf3#
    - 2...Sd7
      - 3.Sf3#
- 1...Sd3
  - 2.Qc4
    - threat
      - 3.Bg5#
    - 2...Sxf4
      - 3.Qxf4#
    - 2...Rg5
      - 3.Bxg5#
Keys
- 1.Rd3!
  - threat
    - 2.Bxg3#
  - 1...Rxd3
    - 2.Sf8
      - threat
        3.Qh3#
      - 2...Sg4
        3.Sg6#
      - 2...Sd7
        3.Sg6#
  - 1...Bxd3
    - 2.Sd4
      - threat
        3.Qh3#
      - 2...Bf5
        3.Sxf5#
      - 2...Sg4
        3.Sf3#
      - 2...Sd7
        3.Sf3#
  - 1...Sxd3
    - 2.Qc4
      - threat
        3.Bg5#
      - 2...Sxf4
        3.Qxf4#
      - 2...Rg5
        3.Bxg5#
  - 1...Sf3
    - 2.Sf8
      - threat
        3.Sg6#
        3.Qh3#
    - 2.Qc4
      - threat
        3.Bg5#
      - 2...Rg5
        3.Bxg5#
      - 2...Sd4
        3.Bxg3#
      - 2...Sg5
        3.Bxg3#
        3.Bxg5#

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