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Problem Display

PID: 268253 (8/8/Q7/3p4/p2N4/1p3P2/pP6/k1Kb4 w - - 0 1)

Serezhkin, Yuri Nikitovich

Shakhmatnaya kompozitsiya, 1996

8/8/Q7/3p4/p2N4/1p3P2/pP6/k1Kb4

#3

5 + 6

SOLUTION

SOUND
Sets
- 1...Be2
  - 2.Qxe2
    - 2...a3
      - 3.Sxb3#
Tries
- 1.Qf1?
  - threat
    - 2.Qxd1
      - 2...a3
        3.Sxb3#
  - 1...Bxf3
    - 2.Qxf3
      - 2...a3
        3.Sxb3#
  - 1...Bc2
    - 2.Sxc2+
      - 2...bxc2
        3.Kxc2#
  - 1...Be2
    - 2.Qxe2
      - 2...a3
        3.Sxb3#
  - 1...a3!
- 1.Qxa4?
  - threat
    - 2.Qxb3
      - 2...Bxb3
        3.Sxb3#
      - 2...Bxf3
        3.Sc2#
      - 2...Bc2
        3.Sxc2#
      - 2...Be2
        3.Sc2#
  - 1...Bxf3
    - 2.Sxb3#
  - 1...Be2
    - 2.Sxb3#
  - 1...Bc2!
Keys
- 1.Qd3!
  - threat
    - 2.Qxd1
      - 2...a3
        3.Sxb3#
  - 1...Bxf3
    - 2.Qxf3
      - 2...a3
        3.Sxb3#
  - 1...Bc2
    - 2.Qxc2
      - 2...bxc2
        3.Sxc2#
      - 2...a3
        3.Sxb3#
  - 1...Be2
    - 2.Qxe2
      - 2...a3
        3.Sxb3#
  - 1...a3
    - 2.Qxb3
      - 2...axb2+
        3.Qxb2#
      - 2...Bxb3
        3.Sxb3#
      - 2...Bxf3
        3.Sc2#
      - 2...Bc2
        3.Sxc2#
      - 2...Be2
        3.Sc2#

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