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Problem Display

PID: 251970 (4k3/4p3/8/3RP3/8/8/7b/5R1K w - - 0 1)

Cheney, Richard Eugene

Europe Echecs, 1965

4k3/4p3/8/3RP3/8/8/7b/5R1K

#4

4 + 3

6490	yacpdb	2021

SOLUTION

SOUND
Keys
- 1.e6!
  - threat
    - 2.Rc5
      - threat
        3.Rc8#
      - 2...Bc7
        3.Rg5
        threat
        4.Rg8#
        3...Kd8
        4.Rf8#
        4.Rg8#
    - 2.Rg5
      - threat
        3.Rg8#
      - 2...Kd8
        3.Rc1
        threat
        4.Rg8#
        3...Ke8
        4.Rc8#
        4.Rg8#
  - 1...Bf4
    - 2.Rc5
      - threat
        3.Rc8#
      - 2...Kd8
        3.Rxf4
        3...Ke8
        4.Rc8#
      - 2...Kf8
        3.Rg5
        3...Ke8
        4.Rg8#
      - 2...Bc7
        3.Rg5
        threat
        4.Rg8#
        3...Kd8
        4.Rf8#
        4.Rg8#
  - 1...Bd6
    - 2.Rg1
      - threat
        3.Rg8#
      - 2...Kd8
        3.Rc1
        3...Ke8
        4.Rc8#
      - 2...Kf8
        3.Rf5+
        3...Ke8
        4.Rg8#
      - 2...Bg3
        3.Rxg3
        3...Kf8
        4.Rd8#
  - 1...Be5
    - 2.Rxe5
      - 2...Kd8
        3.Rc1
        3...Ke8
        4.Rc8#
        3.Rc5
        3...Ke8
        4.Rc8#
    - 2.Rc5
      - threat
        3.Rc8#
      - 2...Bc7
        3.Rg5
        threat
        4.Rg8#
        3...Kd8
        4.Rf8#
        4.Rg8#

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