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Problem Display

PID: 52918 (Q7/8/8/8/8/1KNb3p/6pr/7k w - - 0 1)

af Hallstrom, Edvard Johannes Gabriel

Suomen Shakki, 1926

Q7/8/8/8/8/1KNb3p/6pr/7k

#3

3 + 5

SOLUTION

SOUND
Sets
- 1...Be4
  - 2.Sxe4
    - 2...Kg1
      - 3.Qa1#
    - 2...g1Q
      - 3.Sf2#
      - 3.Sg3#
    - 2...g1S
      - 3.Sf2#
      - 3.Sg3#
    - 2...g1B
      - 3.Sf2#
      - 3.Sg3#
    - 2...g1R
      - 3.Sf2#
      - 3.Sg3#
  - 2.Qxe4
    - 2...Kg1
      - 3.Qe1#
Keys
- 1.Se4!
  - threat
    - 2.Sg3+
      - 2...Kg1
        3.Qa7#
  - 1...Bc2+
    - 2.Kxc2
      - 2...g1Q+
        3.Sf2#
      - 2...g1S+
        3.Sf2#
      - 2...g1B+
        3.Sf2#
      - 2...g1R+
        3.Sf2#
      - 2...Kg1
        3.Qa1#
  - 1...Bc4+
    - 2.Kxc4
      - 2...Kg1
        3.Qa1#
      - 2...g1Q
        3.Sf2#
        3.Sg3#
      - 2...g1S
        3.Sf2#
        3.Sg3#
      - 2...g1B
        3.Sf2#
        3.Sg3#
      - 2...g1R
        3.Sf2#
        3.Sg3#
  - 1...Kg1
    - 2.Qa7+
      - 2...Kf1
        3.Qf2#
      - 2...Kh1
        3.Sg3#
  - 1...Bxe4
    - 2.Qxe4
      - 2...Kg1
        3.Qe1#

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