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Problem Display

PID: 197600 (1Q6/5K1p/p4p2/Rb3r1r/2kP1p2/P4P2/2P1N3/8 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd NSB, 1920

1Q6/5K1p/p4p2/Rb3r1r/2kP1p2/P4P2/2P1N3/8

#3

8 + 8

6490	yacpdb	2019

SOLUTION

SOUND
Sets
- 1...Kd5
  - 2.Qc7
    - threat
      - 3.Qc5#
      - 3.c4#
- 1...Rd5
  - 2.Ra4+
    - 2...Bxa4
      - 3.Qb4#
- 1...Ba4
  - 2.Qb4#
- 1...Bc6
  - 2.Qb3#
  - 2.Qb4#
- 1...Bd7
  - 2.Qb3#
  - 2.Qb4#
Tries
- 1.Ra4+?
  - 1...Bxa4
    - 2.Qb4+
      - 2...Kd5
        3.Qc5#
  - 1...Kd5!
- 1.Qc7+?
  - 1...Bc6
    - 2.Ra4+
      - 2...Kb5
        3.Sc3#
        3.Rb4#
        3.Qa5#
      - 2...Kd5
        3.Sc3#
        3.c4#
    - 2.Qxc6+
      - 2...Rc5
        3.Ra4#
  - 1...Rc5!
- 1.Qc8+?
  - 1...Bc6
    - 2.Ra4+
      - 2...Kb5
        3.Qxa6#
      - 2...Kd5
        3.Qe6#
    - 2.Qe6+
      - 2...Rd5
        3.Rc5#
      - 2...Bd5
        3.Rc5#
    - 2.Qxc6+
      - 2...Rc5
        3.Ra4#
  - 1...Rc5!
Keys
- 1.d5!
  - threat
    - 2.Qc7+
      - 2...Kxd5
        3.c4#
      - 2...Bc6
        3.Qxc6#
  - 1...Be8+
    - 2.Qxe8
      - threat
        3.Qa4#
        3.Qc6#
        3.Qe4#
        3.Qc8#
  - 1...Kc5
    - 2.Qc7+
      - 2...Kxd5
        3.c4#
  - 1...Kxd5
    - 2.Qc7
      - threat
        3.c4#
  - 1...Rxd5
    - 2.Qxf4+
      - 2...Kc5
        3.Qc7#
      - 2...Rd4
        3.Qxd4#
  - 1...Rfg5
    - 2.Qc7+
      - 2...Kxd5
        3.c4#
      - 2...Bc6
        3.Qxf4#
        3.Qxc6#

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