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Problem Display

PID: 153801 (8/7b/8/1R6/4PR2/8/8/k4K2 w - - 0 1)

Aleksandrov, Vladimir Aleksandrovich

The Problemist Supplement, 2014

8/7b/8/1R6/4PR2/8/8/k4K2

#3

4 + 2

SOLUTION

SOUND
Sets
- 1...Ka2
  - 2.Rf6
    - threat
      - 3.Ra6#
    - 2...Ka1
      - 3.Ra6#
    - 2...Ka3
      - 3.Ra6#
  - 2.Rf7
    - threat
      - 3.Ra7#
    - 2...Ka1
      - 3.Ra7#
    - 2...Ka3
      - 3.Ra7#
- 1...Bxe4
  - 2.Rxe4
    - 2...Ka2
      - 3.Ra4#
- 1...Bf5
  - 2.exf5
    - 2...Ka2
      - 3.Ra4#
Tries
- 1.Rf3?
  - threat
    - 2.Ra3#
  - 1...Ka2
    - 2.Rf6
      - threat
        3.Ra6#
      - 2...Ka1
        3.Ra6#
      - 2...Ka3
        3.Ra6#
    - 2.Rf7
      - threat
        3.Ra7#
      - 2...Ka1
        3.Ra7#
      - 2...Ka3
        3.Ra7#
  - 1...Bg8!
- 1.Rf6?
  - threat
    - 2.Ra6#
  - 1...Ka2
    - 2.Ra6#
  - 1...Bg8!
- 1.Rf7?
  - threat
    - 2.Ra7#
  - 1...Ka2
    - 2.Ra7#
  - 1...Bg8!
- 1.Rf8?
  - threat
    - 2.Ra8#
  - 1...Bg8
    - 2.Rxg8
      - 2...Ka2
        3.Ra8#
  - 1...Bxe4!
Keys
- 1.Rg4!
  - 1...Ka2
    - 2.Rg7
      - threat
        3.Ra7#
      - 2...Ka1
        3.Ra7#
      - 2...Ka3
        3.Ra7#
  - 1...Bxe4
    - 2.Rxe4
      - 2...Ka2
        3.Ra4#
  - 1...Bg6
    - 2.Rxg6
      - 2...Ka2
        3.Ra6#
  - 1...Bf5
    - 2.exf5
      - 2...Ka2
        3.Ra4#
  - 1...Bg8
    - 2.Rxg8
      - 2...Ka2
        3.Ra8#

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