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Problem Display

PID: 266599 (8/7p/8/8/5N2/8/KP1p3Q/2k5 w - - 0 1)

Koblov, N

Zadachi i Etyudi, 2011

8/7p/8/8/5N2/8/KP1p3Q/2k5

#3

4 + 3

SOLUTION

SOUND
Sets
- 1...Kd1
  - 2.Kb1
    - threat
      - 3.Qg1#
      - 3.Qh1#
      - 3.Qe2#
    - 2...Ke1
      - 3.Qg1#
      - 3.Qe2#
  - 2.Qg1+
    - 2...Kc2
      - 3.Qb1#
  - 2.Qh1+
    - 2...Kc2
      - 3.Qb1#
- 1...Kc2
  - 2.Qxh7+
    - 2...Kc1
      - 3.Qb1#
    - 2...Kd1
      - 3.Qb1#
- 1...d1S
  - 2.Sd3#
- 1...d1B
  - 2.Sd3#
Tries
- 1.Sd3+?
  - 1...Kd1
    - 2.Kb1
      - threat
        3.Qh5#
      - 2...h5
        3.Qxh5#
    - 2.Kb3
      - threat
        3.Qh5#
      - 2...h5
        3.Qxh5#
  - 1...Kc2!
Keys
- 1.Qh6!
  - 1...Kd1
    - 2.Qh1+
      - 2...Kc2
        3.Qb1#
  - 1...Kc2
    - 2.Qxh7+
      - 2...Kc1
        3.Qb1#
      - 2...Kd1
        3.Qb1#
  - 1...d1Q
    - 2.Sd3+
      - 2...Kc2
        3.Sb4#
  - 1...d1S
    - 2.Sd3+
      - 2...Kc2
        3.Se1#
        3.Sb4#
  - 1...d1B
    - 2.Sg2+
      - 2...Kc2
        3.Se1#
    - 2.Sd3+
      - 2...Kc2
        3.Se1#
        3.Sb4#
    - 2.Sd5+
      - 2...Kc2
        3.Sb4#
  - 1...d1R
    - 2.Sd3+
      - 2...Kc2
        3.Sb4#
    - 2.Qc6+
      - 2...Kd2
        3.Qc3#

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