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Problem Display

PID: 251113 (Q7/P3K3/8/3R4/8/4k1p1/8/7B w - - 0 1)

Koblov, N

Uralski Problemist, 2012

Q7/P3K3/8/3R4/8/4k1p1/8/7B

#3

5 + 2

SOLUTION

SOUND
Sets
- 1...Kf2
  - 2.Re5
    - threat
      - 3.Qg2#
    - 2...Kf1
      - 3.Qg2#
    - 2...Kg1
      - 3.Qg2#
    - 2...g2
      - 3.Qxg2#
Tries
- 1.Qc8?
  - 1...Ke2
    - 2.Qc2+
      - 2...Ke1
        3.Rd1#
      - 2...Kf1
        3.Rd1#
      - 2...Ke3
        3.Qd2#
  - 1...Kf2
    - 2.Qc2+
      - 2...Ke1
        3.Rd1#
      - 2...Kf1
        3.Rd1#
      - 2...Kg1
        3.Rd1#
        3.Qg2#
      - 2...Ke3
        3.Qd2#
  - 1...Kf4
    - 2.Qf5+
      - 2...Ke3
        3.Qf3#
  - 1...g2!
- 1.Qf8?
  - threat
    - 2.Qf3#
  - 1...Ke2
    - 2.Bg2
      - 2...Ke1
        3.Qf1#
      - 2...Ke3
        3.Qf3#
    - 2.Qf3+
      - 2...Ke1
        3.Rd1#
  - 1...g2!
Keys
- 1.Bg2!
  - 1...Ke2
    - 2.Qf8
      - 2...Ke1
        3.Qf1#
      - 2...Ke3
        3.Qf3#
  - 1...Kf2
    - 2.Rd1
      - threat
        3.Qf3#
      - 2...Ke2
        3.Qf3#
      - 2...Ke3
        3.Qf3#
  - 1...Kf4
    - 2.Re5
      - threat
        3.Qe4#
      - 2...Kg4
        3.Qe4#
      - 2...Kxe5
        3.Qe4#

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