A thumbnail of some example SVG output
The SVG output from this version may not work in your browser (Firefox has problems, certainly) so I would recommend using Inkscape for editing, printing and producing PDF output.

cwc - A Crossword Compiler

cwc is a very useful crossword compiler program written by Lars Christensen which is based on the algorithms described in Sik Cambon Jensen's thesis "Design and Implementation of Crossword Compilation Programs Using Serial Approaches". I have not been able to contact Lars to ask whether he is still maintaining cwc, since the email address (larsch@cs.auc.dk) on the two webpages I've found for the program no longer works and Lars Chistensen is a very common name. However, I wanted to release a version with a few changes, hence this page. If you would like to contribute changes to this version, or have any other feedback please email me.

The original web pages for cwc are here:

In addition, the original source code is commit 3f496e3d67d1ed0f45, tagged cwc-version-1.0.1, in the git repository.

For further details about the algorithms employed by cwc, please refer to the pages above.


cwc is copyright (C) 1999, 2000, 2001, 2002 Lars Christensen, with further modifications copyright (C) 2008 Mark Longair.


You can download a tar archive of version 1.0.2 or clone the repository using git with:

   git clone git://repo.or.cz/cwc.git


For a full list of changes, see the the git logs; those points below are summaries.

In version 1.0.2:

Things To Do

License Information

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

You can email me (Mark Longair) at: My email address in a graphic: the part before the at sign
is mark followed by hyphen and random and the bit afterwards is
mythic hyphen beasts dot com