Uragaeshi Online (Reversi)

Uragaeshi is a Japanese name for 8x8 reversi game that originated in England.

Features:
- Player vs Player (ranked, free, private)
- Player vs Computer
- Watching games
- Rankings
- Edit
- Sharing URLs

Others:
- Rank system
- Handicap game, Even (non-handicap) game
- Sudden death (1-20 minutes), Japanese byo-yomi (10-60 seconds, once)