Chess for World of Warcraft
You both need to be in the same party to play chess. The challenger always plays with black pieces.
You can maximize the frame by rightclicking the titlebar.
There are two ways to challenge a player:
1) Target the player you want to play with and type in /chess to challenge him to a game.
2) Pass the name of the player you want to play with as an argument like so: /chess PlayerName-RealmName
Thanks to lichess.com for allowing me to use their maestro chess pieces.
Implemented features: En passant, castling, promoting, 50 move rule, threefold repetition, legal move highlighting, not allowing illegal moves, history, inverted table for black