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Problem Display

PID: 188001 (qn3b2/5P2/1n1PBR1P/1p2k3/b2p2pK/1P5p/5N2/5Q2 w - - 0 1)

Challenger, Alfred Clement

The Observer, 1936

(First published on Sun Aug 30 1936)

qn3b2/5P2/1n1PBR1P/1p2k3/b2p2pK/1P5p/5N2/5Q2

#3

9 + 10

15239	Valois Notebooks	2019

SOLUTION

SOUND
Sets
- 1...Bxd6
  - 2.Sd3+
    - 2...Ke4
      - 3.Qe2#
  - 2.Sxg4+
    - 2...Ke4
      - 3.Qe2#
      - 3.Qf3#
      - 3.Qf5#
Tries
- 1.Sd3+?
  - 1...Ke4
    - 2.Qe2#
  - 1...Kxd6!
- 1.Sxg4+?
  - 1...Ke4
    - 2.Rf4#
    - 2.Qe2#
    - 2.Qf3#
    - 2.Qf5#
  - 1...Kxd6!
Keys
- 1.Bd5!
  - threat
    - 2.Sd3+
      - 2...Kxd5
        3.Qh1#
  - 1...Kxd5
    - 2.Qh1+
      - 2...Kc5
        3.Sd3#
      - 2...Ke5
        3.Sxg4#
  - 1...Kxf6
    - 2.Sxg4+
      - 2...Kg6
        3.Qd3#
  - 1...Qxd5
    - 2.Sd3+
      - 2...Ke4
        3.Qe2#
    - 2.Sxg4+
      - 2...Ke4
        3.Rf4#
        3.Qe2#
        3.Qf3#
  - 1...Bxb3
    - 2.Qe2+
      - 2...Kxd5
        3.Qxb5#
      - 2...Kxf6
        3.Qe6#
  - 1...Sxd5
    - 2.Sd3+
      - 2...Ke4
        3.Re6#
    - 2.Sxg4+
      - 2...Ke4
        3.Re6#
        3.Qf3#
        3.Qf5#
  - 1...d3
    - 2.Qxd3
      - threat
        3.Sxg4#
      - 2...Kxf6
        3.Sxg4#
      - 2...g3
        3.Sg4#
  - 1...Qc6
    - 2.Sd3+
      - 2...Kxd5
        3.Qh1#
        3.Qf5#
    - 2.Sxg4+
      - 2...Kxd5
        3.Qf5#
  - 1...h2
    - 2.Sd3+
      - 2...Kxd5
        3.Qg2#
        3.Qh1#
  - 1...g3
    - 2.Sd3+
      - 2...Kxd5
        3.Qf3#

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