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Problem Display

PID: 207586 (8/1p6/1p6/1p4Np/1P2Pk1K/2QP4/1P6/8 w - - 0 1)

Skowronek, Ernst

Die Schwalbe, 1974

8/1p6/1p6/1p4Np/1P2Pk1K/2QP4/1P6/8

#4

7 + 5

SOLUTION

SOUND
Keys
- 1.e5!
  - threat
    - 2.Qd4+
      - 2...Kf5
        3.Qe4#
    - 2.Qe1
      - 2...Kf5
        3.Qe4#
  - 1...Ke3
    - 2.Qc2
      - threat
        3.d4
        3...Kxd4
        4.Qe4#
        3...Kf4
        4.Qe4#
        4.Qf2#
      - 2...Kd4
        3.Qe2
        3...Kd5
        4.Qe4#
      - 2...Kf4
        3.Qe2
        3...Kf5
        4.Qe4#
  - 1...Kf5
    - 2.Kxh5
      - 2...Kf4
        3.Qe1
        3...Kf5
        4.Qe4#
        3.d4
        3...Kf5
        4.Qf3#
    - 2.Qd4
      - 2...Kg6
        3.Qd7
        3...Kh6
        4.Qh7#
    - 2.Qb3
      - 2...Kf4
        3.d4
        3...Kf5
        4.Qf7#
      - 2...Kxe5
        3.Qe6+
        3...Kd4
        4.Qe4#
        3...Kf4
        4.Qe4#
      - 2...Kg6
        3.Qf7+
        3...Kh6
        4.Qf6#
        4.Qh7#
    - 2.d4
      - threat
        3.Qc2+
        3...Kf4
        4.Qe4#
        4.Qf2#
        3.Qd3+
        3...Kf4
        4.Sh3#
        4.Se6#
        4.Qe4#
        4.Qf3#
        3.Qf3+
        3...Kg6
        4.Qf6#
        3.Kxh5
        3...Kf4
        4.Qf3#
      - 2...Kg6
        3.Qc7
        threat
        4.Qh7#
        3...Kf5
        4.Qf7#
        3...Kh6
        4.Qh7#

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).