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Problem Display

PID: 117603 (n7/n3kPPP/4N3/4p3/2N1p3/8/8/b4K2 w - - 0 1)

Martin, Ernst Otto

Schach, 1962

n7/n3kPPP/4N3/4p3/2N1p3/8/8/b4K2

#3

6 + 6

6490	yacpdb	2009

SOLUTION

SOUND
Tries
- 1.f8Q+?
  - 1...Kxe6
    - 2.g8Q+
      - 2...Kd7
        3.Qd6#
  - 1...Kd7!
Keys
- 1.g8Q!
  - threat
    - 2.Sc5
      - threat
        3.f8Q#
      - 2...Kf6
        3.f8Q#
    - 2.Qe8+
      - 2...Kf6
        3.f8Q#
        3.f8R#
    - 2.f8Q+
      - 2...Kd7
        3.Qd6#
        3.Qe8#
  - 1...Kxe6
    - 2.f8Q+
      - 2...Kd7
        3.Qd6#
  - 1...Bd4
    - 2.Qe8+
      - 2...Kf6
        3.f8Q#
        3.f8R#
    - 2.f8Q+
      - 2...Kd7
        3.Qd6#
        3.Qe8#
  - 1...Sb5
    - 2.Sc5
      - threat
        3.f8Q#
      - 2...Kf6
        3.f8Q#
    - 2.Qe8+
      - 2...Kf6
        3.f8Q#
        3.f8R#
    - 2.f8Q+
      - 2...Kd7
        3.Qe8#
  - 1...Sc8
    - 2.Sc5
      - threat
        3.f8Q#
      - 2...Kf6
        3.f8Q#
    - 2.Qe8+
      - 2...Kf6
        3.f8Q#
        3.f8R#
    - 2.f8Q+
      - 2...Kd7
        3.Qe8#
  - 1...Sb6
    - 2.Qe8+
      - 2...Kf6
        3.f8Q#
        3.f8R#
    - 2.f8Q+
      - 2...Kd7
        3.Qd6#
        3.Qe8#
  - 1...Sc7
    - 2.f8Q+
      - 2...Kd7
        3.Qd6#
  - 1...e3
    - 2.Qe8+
      - 2...Kf6
        3.f8Q#
        3.f8R#
    - 2.f8Q+
      - 2...Kd7
        3.Qd6#
        3.Qe8#

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).