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Problem Display

PID: 253725 (8/1p6/8/8/8/2p1K3/2p3Q1/1kB5 w - - 0 1)

Dreijers, Albert

Schach, 1959

8/1p6/8/8/8/2p1K3/2p3Q1/1kB5

#3

3 + 4

6490	yacpdb	2021

SOLUTION

SOUND
Sets
- 1...Kxc1
  - 2.Qxb7
    - 2...Kd1
      - 3.Qh1#
Tries
- 1.Qc6?
  - threat
    - 2.Qxc3
      - threat
        3.Qb2#
      - 2...Kxc1
        3.Qa1#
      - 2...Ka2
        3.Qb2#
  - 1...Ka1
    - 2.Qxc3+
      - 2...Kb1
        3.Qb2#
      - 2...Ka2
        3.Qb2#
  - 1...Kxc1
    - 2.Qxb7
      - 2...Kd1
        3.Qh1#
  - 1...Ka2
    - 2.Qxc3
      - threat
        3.Qb2#
      - 2...Kb1
        3.Qb2#
  - 1...bxc6!
- 1.Qxc2+?
  - 1...Ka1
    - 2.Qxc3+
      - 2...Kb1
        3.Qb2#
      - 2...Ka2
        3.Qb2#
  - 1...Kxc2!
- 1.Qd2?
  - threat
    - 2.Qxc3
      - threat
        3.Qb2#
      - 2...Kxc1
        3.Qa1#
      - 2...Ka2
        3.Qb2#
  - 1...Ka1
    - 2.Qxc3+
      - 2...Kb1
        3.Qb2#
      - 2...Ka2
        3.Qb2#
  - 1...Ka2
    - 2.Qxc3
      - threat
        3.Qb2#
      - 2...Kb1
        3.Qb2#
  - 1...cxd2!
Keys
- 1.Qg7!
  - threat
    - 2.Qxc3
      - threat
        3.Qb2#
      - 2...Kxc1
        3.Qa1#
      - 2...Ka2
        3.Qb2#
  - 1...Ka1
    - 2.Qxc3+
      - 2...Kb1
        3.Qb2#
      - 2...Ka2
        3.Qb2#
  - 1...Kxc1
    - 2.Qxb7
      - 2...Kd1
        3.Qh1#
  - 1...Ka2
    - 2.Qxc3
      - threat
        3.Qb2#
      - 2...Kb1
        3.Qb2#

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