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Problem Display

PID: 31673 (Q7/8/1pN5/1k6/N7/n2K4/8/8 w - - 0 1)

Kniest, Peter

Die Schwalbe, 1940

Q7/8/1pN5/1k6/N7/n2K4/8/8

#3

4 + 3

3773	FIDE Album (1914-1944) (II)	1972

SOLUTION

SOUND
Sets
- 1...Sb1
  - 2.Kd4
    - 2...Sd2
      - 3.Sc3#
    - 2...Sa3
      - 3.Sc3#
    - 2...Sc3
      - 3.Sxc3#
- 1...Sc2
  - 2.Kc3
    - 2...Sa1
      - 3.Sd4#
    - 2...Se1
      - 3.Sd4#
    - 2...Sa3
      - 3.Sd4#
    - 2...Se3
      - 3.Sd4#
    - 2...Sb4
      - 3.Sd4#
    - 2...Sd4
      - 3.Sxd4#
- 1...Sc4
  - 2.Kd4
    - threat
      - 3.Sc3#
Tries
- 1.Kc3?
  - threat
    - 2.Sd4#
  - 1...Sb1+
    - 2.Kd4
      - 2...Sd2
        3.Sc3#
      - 2...Sa3
        3.Sc3#
      - 2...Sc3
        3.Sxc3#
  - 1...Sc2!
Keys
- 1.Kd4!
  - threat
    - 2.Sc3#
  - 1...Sc2+
    - 2.Kc3
      - 2...Sa1
        3.Sd4#
      - 2...Se1
        3.Sd4#
      - 2...Sa3
        3.Sd4#
      - 2...Se3
        3.Sd4#
      - 2...Sb4
        3.Sd4#
      - 2...Sd4
        3.Sxd4#
  - 1...Sb1
    - 2.Kd5
      - 2...Sc3+
        3.Sxc3#
      - 2...Sd2
        3.Sc3#
      - 2...Sa3
        3.Sc3#

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