K-Chess Elite. Loads of features for learners
and experts alike. Lots of help and hints, on
screen calculations, set time limits and 
playing strength, undo and redo moves, save 
and restore games in PGN and other formats, 
add comments to games, print games, set board
to any layout, and more. Dozens of options to
customise the appearance and operation of the
game. Includes commented sample games. 16 and
32 bit versions.