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Problem Display

PID: 173223 (6K1/6Q1/8/8/8/5R2/n5pb/7k w - - 0 1)

Howard, David M

Problem Observer, 1996

6K1/6Q1/8/8/8/5R2/n5pb/7k

#3

3 + 4

6490	yacpdb	2018

SOLUTION

SOUND
Sets
- 1...Kg1
  - 2.Qa1+
    - 2...Sc1
      - 3.Qxc1#
Keys
- 1.Qb7!
  - threat
    - 2.Rf1+
      - 2...Bg1
        3.Qh7#
    - 2.Rf2
      - threat
        3.Qxg2#
      - 2...Kg1
        3.Qxg2#
  - 1...g1Q+
    - 2.Rg3+
      - 2...Qg2
        3.Qxg2#
  - 1...g1R+
    - 2.Rg3+
      - 2...Rg2
        3.Qxg2#
  - 1...Kg1
    - 2.Qb1+
      - 2...Sc1
        3.Qxc1#
  - 1...Bg3
    - 2.Rxg3
      - threat
        3.Qxg2#
      - 2...Kg1
        3.Qxg2#
      - 2...Kh2
        3.Qxg2#
  - 1...Bf4
    - 2.Rf2
      - threat
        3.Qxg2#
      - 2...Kg1
        3.Qxg2#
      - 2...Kh2
        3.Qxg2#
  - 1...Be5
    - 2.Rf2
      - threat
        3.Qxg2#
      - 2...Kg1
        3.Qxg2#
      - 2...Kh2
        3.Qxg2#
  - 1...Bd6
    - 2.Rf2
      - threat
        3.Qxg2#
      - 2...Kg1
        3.Qxg2#
      - 2...Kh2
        3.Qxg2#
  - 1...Bc7
    - 2.Rf2
      - threat
        3.Qxg2#
      - 2...Kg1
        3.Qxg2#
      - 2...Kh2
        3.Qxg2#
  - 1...Bb8
    - 2.Rf2
      - threat
        3.Qxg2#
      - 2...Kg1
        3.Qxg2#
      - 2...Kh2
        3.Qxg2#
  - 1...Bg1
    - 2.Rg3
      - threat
        3.Qxg2#
      - 2...Kh2
        3.Qxg2#
  - 1...Sc3
    - 2.Rf1+
      - 2...Bg1
        3.Qh7#
  - 1...Sb4
    - 2.Rf1+
      - 2...Bg1
        3.Qh7#

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