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Problem Display

PID: 212820 (8/pR1p1n2/1p1k1P2/p2P2BP/NppPP3/p5p1/4P1n1/5bK1 w - - 0 1)

Cheney, George Nelson

American Chess Nuts, 1868

8/pR1p1n2/1p1k1P2/p2P2BP/NppPP3/p5p1/4P1n1/5bK1

#4

10 + 12

6490	yacpdb	2020

SOLUTION

SOUND
Keys
- 1.Bc1!
  - threat
    - 2.Sc3
      - threat
        3.Sb5#
      - 2...a6
        3.Bh6
        threat
        4.Bf8#
        3...Sxh6
        4.e5#
  - 1...Se3
    - 2.Bxe3
      - threat
        3.Bf4+
        3...Se5
        4.Bxe5#
        4.dxe5#
      - 2...Se5
        3.Bf4
        threat
        4.Bxe5#
        4.dxe5#
  - 1...Se5
    - 2.Bh6
      - threat
        3.Bf8#
      - 2...Sf3+
        3.exf3
        threat
        4.Bf8#
      - 2...Sc6
        3.Bf8+
        3...Se7
        4.Bxe7#
      - 2...Sg6
        3.hxg6
        threat
        4.Bf8#
  - 1...Sg5
    - 2.Bxg5
      - threat
        3.Bh6
        threat
        4.Bf8#
        3.f7
        threat
        4.f8Q#
        4.f8B#
  - 1...c3
    - 2.Sxc3
      - threat
        3.Sb5#
      - 2...Bxe2
        3.Bh6
        threat
        4.Bf8#
        3...Sxh6
        4.e5#
      - 2...a6
        3.Bh6
        threat
        4.Bf8#
        3...Sxh6
        4.e5#
  - 1...b5
    - 2.Bh6
      - threat
        3.Bf8#
      - 2...Sxh6
        3.Sc5
        threat
        4.Rxd7#

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