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Problem Display

PID: 226290 (8/2K5/4ppQ1/4k2p/2p4P/P3P3/2N5/8 w - - 0 1)

Kogel, Philip

Praca, 1948

8/2K5/4ppQ1/4k2p/2p4P/P3P3/2N5/8

#3

6 + 5

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...c3
  - 2.Qd3
    - 2...f5
      - 3.Qd4#
Tries
- 1.Kd7?
  - 1...c3
    - 2.Qd3
      - 2...f5
        3.Qd4#
  - 1...Kd5!
- 1.Sb4?
  - 1...c3
    - 2.Qd3
      - threat
        3.Sc6#
      - 2...f5
        3.Qd4#
  - 1...f5!
- 1.Qd3?
  - 1...c3
    - 2.Kb6
      - 2...f5
        3.Qd4#
    - 2.Kc6
      - 2...f5
        3.Qd4#
    - 2.Kb7
      - 2...f5
        3.Qd4#
    - 2.Kd7
      - 2...f5
        3.Qd4#
    - 2.Kb8
      - 2...f5
        3.Qd4#
    - 2.Kc8
      - 2...f5
        3.Qd4#
    - 2.Kd8
      - 2...f5
        3.Qd4#
    - 2.Se1
      - threat
        3.Sf3#
      - 2...f5
        3.Qd4#
    - 2.Sb4
      - threat
        3.Sc6#
      - 2...f5
        3.Qd4#
    - 2.a4
      - 2...f5
        3.Qd4#
  - 1...cxd3!
Keys
- 1.Se1!
  - 1...Kd5
    - 2.Qxf6
      - threat
        3.Qd4#
      - 2...Ke4
        3.Qxe6#
      - 2...Kc5
        3.Qe5#
      - 2...e5
        3.Qc6#
  - 1...f5
    - 2.Qg7+
      - 2...Ke4
        3.Qd4#
      - 2...Kd5
        3.Qd4#
  - 1...c3
    - 2.Qd3
      - threat
        3.Sf3#
      - 2...f5
        3.Qd4#

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).