The game of Chu Shogi (Middle Japanese chess) is at least 800 years old and is my personal favourite. Rules and other information can be found, starting from http://www.colina.demon.co.uk/chu.html. This page refers to a previous program that I wrote 10 years a go. Do not be confused - it is not a Haskell program and is no longer maintained. However, I am keeping compatibility with many of the file formats used by that program, and much of the interactive behaviour. Hence the version number here starts with 3.0.0.0. The GUI is gtk2-based, so if you are on Windows or MacOSX you will need to install the libraries (Linux users presumably already have them). Building from source will also require installing gtk2hs 0.10.0 or later (Cabal does not support his yet).