Remove obsolte note.
Update URL.
Avoid repeatedly calling chess-pos-en-passant.
Update commentary.
Convert some file headers to the standard form including license.
Add proper file header.
Add proper file header.
Add proper file header.
Add proper file header.
Add proper file headers.
Proper file header and introductory commentary for chess-pgn.el.
Add a peroper file header.
Upgrade to GPLv3.
Add "data" keyword and set copyright to FSF.
Upgrade to GPLv3.
Add a proper file header.
Upgrade to GPLv3.
Upgrade to GPLv3.
Add a proper file header.
Add proper file header.