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Problem Display

PID: 172932 (8/8/4p3/pp5Q/1k6/1P6/2K5/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2002

8/8/4p3/pp5Q/1k6/1P6/2K5/8

#3

3 + 4

6490	yacpdb	2018

SOLUTION

SOUND
Sets
- 1...Ka3
  - 2.Qxb5
    - threat
      - 3.Qa4#
      - 3.Qxa5#
    - 2...Ka2
      - 3.Qa4#
      - 3.Qxa5#
    - 2...a4
      - 3.Qxa4#
Tries
- 1.Kb2?
  - threat
    - 2.Qe5
      - 2...a4
        3.Qc3#
  - 1...e5
    - 2.Qxe5
      - 2...a4
        3.Qc3#
  - 1...a4!
- 1.Qxb5+?
  - 1...Ka3
    - 2.Qa4#
    - 2.Qxa5#
  - 1...Kxb5!
- 1.Qd5?
  - threat
    - 2.Qd6#
  - 1...Ka3
    - 2.Qxb5
      - threat
        3.Qa4#
        3.Qxa5#
      - 2...Ka2
        3.Qa4#
        3.Qxa5#
      - 2...a4
        3.Qxa4#
  - 1...a4
    - 2.Qd6+
      - 2...Ka5
        3.b4#
  - 1...exd5!
- 1.Qg5?
  - threat
    - 2.Qe7#
  - 1...Ka3
    - 2.Qxb5
      - threat
        3.Qa4#
        3.Qxa5#
      - 2...Ka2
        3.Qa4#
        3.Qxa5#
      - 2...a4
        3.Qxa4#
  - 1...a4!
Keys
- 1.Qe5!
  - threat
    - 2.Qd6#
  - 1...Ka3
    - 2.Qxb5
      - threat
        3.Qa4#
        3.Qxa5#
      - 2...Ka2
        3.Qa4#
        3.Qxa5#
      - 2...a4
        3.Qxa4#
  - 1...a4
    - 2.Qd6+
      - 2...Ka5
        3.b4#

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