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Problem Display

PID: 80727 (8/4p3/8/7p/4K2k/5QN1/8/8 w - - 0 1)

Akerblom, Johan Axel

Svenska Dagbladet, 1928

8/4p3/8/7p/4K2k/5QN1/8/8

#3

3 + 3

SOLUTION

SOUND
Sets
- 1...Kh3
  - 2.Sf1+
    - 2...Kh4
      - 3.Qg3#
Tries
- 1.Kf4?
  - threat
    - 2.Sf5#
    - 2.Qh1#
    - 2.Qxh5#
  - 1...Kh3
    - 2.Qh1#
  - 1...e6
    - 2.Qh1#
    - 2.Qxh5#
  - 1...e5+!
- 1.Kf5?
  - 1...Kh3
    - 2.Sf1+
      - 2...Kh4
        3.Qh1#
        3.Qg3#
  - 1...e5
    - 2.Sf1
      - 2...e4
        3.Qh1#
        3.Qg3#
    - 2.Sh1
      - 2...e4
        3.Qg3#
    - 2.Se2
      - 2...e4
        3.Qh1#
        3.Qg3#
    - 2.Sxh5
      - 2...e4
        3.Qh1#
        3.Qg4#
    - 2.Qg2
      - 2...e4
        3.Qh2#
  - 1...e6+!
- 1.Qg2?
  - threat
    - 2.Sf5#
  - 1...e6
    - 2.Ke5
      - 2...Kg4
        3.Sf5#
      - 2...Kg5
        3.Sf5#
    - 2.Sf1
      - 2...e5
        3.Qg3#
    - 2.Sh1
      - 2...e5
        3.Qg3#
    - 2.Se2
      - 2...e5
        3.Qg3#
  - 1...Kg5!
Keys
- 1.Ke5!
  - threat
    - 2.Se4
      - 2...e6
        3.Qg3#
    - 2.Sf5+
      - 2...Kg5
        3.Qg2#
        3.Qg3#
  - 1...Kh3
    - 2.Sf1+
      - 2...Kh4
        3.Qg3#
  - 1...e6
    - 2.Qg2
      - 2...Kg4
        3.Sf5#
      - 2...Kg5
        3.Sf5#

FEATURES

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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).