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Problem Display

PID: 79441 (8/2p1R3/8/8/8/2NPK3/1k6/N7 w - - 0 1)

Bacmeister, Kurt

stern, 1969

8/2p1R3/8/8/8/2NPK3/1k6/N7

#3

5 + 2

SOLUTION

SOUND
Sets
- 1...c5
  - 2.Rb7+
    - 2...Kxa1
      - 3.Rb1#
    - 2...Kc1
      - 3.Rb1#
    - 2...Ka3
      - 3.Sc2#
      - 3.Rb3#
    - 2...Kxc3
      - 3.Rb3#
- 1...c6
  - 2.Rb7+
    - 2...Kxa1
      - 3.Rb1#
    - 2...Kc1
      - 3.Rb1#
    - 2...Ka3
      - 3.Sc2#
      - 3.Rb3#
    - 2...Kxc3
      - 3.Rb3#
Tries
- 1.Kd2?
  - 1...Kxa1
    - 2.Kc1
      - 2...c5
        3.Ra7#
      - 2...c6
        3.Ra7#
    - 2.Kc2
      - threat
        3.Re1#
  - 1...c5
    - 2.Sc2
      - threat
        3.Rb7#
      - 2...Kb3
        3.Rb7#
    - 2.Ra7
      - 2...c4
        3.Ra2#
    - 2.Rb7+
      - 2...Kxa1
        3.Rb1#
      - 2...Ka3
        3.Sc2#
        3.Rb3#
  - 1...c6
    - 2.Sc2
      - threat
        3.Rb7#
      - 2...Kb3
        3.Rb7#
    - 2.Ra7
      - 2...c5
        3.Ra2#
    - 2.Rb7+
      - 2...Kxa1
        3.Rb1#
      - 2...Ka3
        3.Sc2#
        3.Rb3#
  - 1...Ka3!
Keys
- 1.Re8!
  - threat
    - 2.Rb8+
      - 2...Kxa1
        3.Rb1#
      - 2...Kc1
        3.Rb1#
      - 2...Ka3
        3.Sc2#
        3.Rb3#
      - 2...Kxc3
        3.Rb3#
  - 1...Kxa1
    - 2.Rb8
      - threat
        3.Rb1#
  - 1...Kc1
    - 2.Rb8
      - threat
        3.Rb1#
  - 1...Ka3
    - 2.Rb8
      - threat
        3.Sc2#
        3.Rb3#
  - 1...Kxc3
    - 2.Rb8
      - threat
        3.Rb3#

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