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Problem Display

PID: 85917 (8/4K2n/8/B3k1n1/6Q1/3P4/b7/8 w - - 0 1)

Speckmann, Werner

Problem (Zagreb), 1980

8/4K2n/8/B3k1n1/6Q1/3P4/b7/8

#3

4 + 4

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Bb1
  - 2.Bc3+
    - 2...Kd5
      - 3.Qc4#
  - 2.Bc7+
    - 2...Kd5
      - 3.Qc4#
- 1...Bc4
  - 2.Bc3+
    - 2...Kd5
      - 3.Qxc4#
  - 2.Bc7+
    - 2...Kd5
      - 3.Qxc4#
- 1...Bd5
  - 2.Bc3#
  - 2.Bc7#
  - 2.d4#
- 1...Be6
  - 2.Bc3+
    - 2...Kd5
      - 3.Qc4#
  - 2.Bc7+
    - 2...Kd5
      - 3.Qc4#
- 1...Bf7
  - 2.Bc3+
    - 2...Kd5
      - 3.Qc4#
  - 2.Bc7+
    - 2...Kd5
      - 3.Qc4#
- 1...Bg8
  - 2.Bc3+
    - 2...Kd5
      - 3.Qc4#
  - 2.Bc7+
    - 2...Kd5
      - 3.Qc4#
- 1...Sf3
  - 2.Qe4#
- 1...Sh3
  - 2.Qe4#
- 1...Se4
  - 2.Qxe4#
- 1...Se6
  - 2.Qe4#
- 1...Sf7
  - 2.Qe4#
Tries
- 1.Qf4+?
  - 1...Kd5
    - 2.Qd6#
  - 1...Kxf4!
Keys
- 1.Bb6!
  - threat
    - 2.Bd4+
      - 2...Kd5
        3.Qd7#
  - 1...Kd5
    - 2.Qd7+
      - 2...Ke5
        3.Bc7#
  - 1...Be6
    - 2.Bc7+
      - 2...Kd5
        3.Qc4#

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).