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Problem Display

PID: 161732 (8/8/8/8/2N5/1K3pQ1/2P1k3/8 w - - 0 1)

Labrinakos, Petros

The Problemist Supplement, 2016

8/8/8/8/2N5/1K3pQ1/2P1k3/8

#3

4 + 2

SOLUTION

SOUND
Sets
- 1...Kd1
  - 2.Qf2
    - 2...Kc1
      - 3.Qe1#
      - 3.Qg1#
      - 3.Qf1#
Tries
- 1.Kc3?
  - 1...Kd1
    - 2.Qf2
      - 2...Kc1
        3.Qe1#
        3.Qg1#
        3.Qf1#
  - 1...Kf1
    - 2.Kd2
      - 2...f2
        3.Se3#
  - 1...f2!
- 1.Se5?
  - 1...Kd1
    - 2.Qf2
      - 2...Kc1
        3.Qe1#
  - 1...Kf1
    - 2.Sd3
      - threat
        3.Qf2#
      - 2...Ke2
        3.Qe1#
      - 2...f2
        3.Qxf2#
  - 1...Ke3
    - 2.Sd3
      - 2...Kd2
        3.Qe1#
      - 2...Ke2
        3.Qe1#
      - 2...Kd4
        3.Qe5#
      - 2...Ke4
        3.Qe5#
  - 1...f2
    - 2.Qd3+
      - 2...Ke1
        3.Sf3#
  - 1...Kd2!
- 1.Qf2+?
  - 1...Kd1
    - 2.Qf1#
    - 2.Qd2#
  - 1...Kxf2!
- 1.Qxf3+?
  - 1...Ke1
    - 2.Qg2
      - 2...Kd1
        3.Qf1#
        3.Qd2#
  - 1...Kxf3!
Keys
- 1.Sb2!
  - 1...Kf1
    - 2.Sd3
      - threat
        3.Qf2#
      - 2...Ke2
        3.Qe1#
      - 2...f2
        3.Qxf2#
  - 1...Kd2
    - 2.Qf2+
      - 2...Kc1
        3.Qe1#
  - 1...Ke3
    - 2.Sd3
      - 2...Kd2
        3.Qe1#
      - 2...Ke2
        3.Qe1#
      - 2...Kd4
        3.Qe5#
      - 2...Ke4
        3.Qe5#
  - 1...f2
    - 2.Qd3+
      - 2...Ke1
        3.Qd1#

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