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Problem Display

PID: 231884 (8/1p1Q4/1N6/3Kp3/p7/8/8/k7 w - - 0 1)

Brunner, Erich Anselm

Deutsche Schachblatter, 1938

8/1p1Q4/1N6/3Kp3/p7/8/8/k7

#4

3 + 4

6490	yacpdb	2021

SOLUTION

SOUND
Keys
- 1.Qxb7!
  - threat
    - 2.Sxa4
      - threat
        3.Qb2#
      - 2...Ka2
        3.Qb2#
  - 1...Kb1
    - 2.Sc4+
      - 2...Kc1
        3.Qb2+
        3...Kd1
        4.Qd2#
      - 2...Kc2
        3.Qb2+
        3...Kd1
        4.Qd2#
        3...Kd3
        4.Qd2#
  - 1...Ka2
    - 2.Sxa4
      - threat
        3.Qb2#
      - 2...Ka3
        3.Kc4
        threat
        4.Qb3#
        3...Ka2
        4.Qb2#
        3...Kxa4
        4.Qa6#
        4.Qa8#
        4.Qb4#
        4.Qa7#
    - 2.Sc4
      - threat
        3.Qb2#
      - 2...a3
        3.Sd2
        threat
        4.Qb1#
        3...Ka1
        4.Qb1#
  - 1...Kb2
    - 2.Sc4+
      - 2...Kc1
        3.Qb2+
        3...Kd1
        4.Qd2#
      - 2...Kc2
        3.Qb2+
        3...Kd1
        4.Qd2#
        3...Kd3
        4.Qd2#
      - 2...Kc3
        3.Qb2+
        3...Kd3
        4.Qd2#
  - 1...a3
    - 2.Sc4
      - 2...Ka2
        3.Sd2
        threat
        4.Qb1#
        3...Ka1
        4.Qb1#
      - 2...e4
        3.Sd2
        threat
        4.Qb1#
        3...Ka2
        4.Qb1#
        3...a2
        4.Qg7#

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