free "Ring Bridge" automated Havannah tournaments on Ludoteka

www.ludoteka.com is a real time game server based in Spain. English menus are available, and the players often speak English. They have lots of card and dice games, and a growing collection of abstracts. Each Friday is a Havannah tournament, on a grid 8 cells on each side. The time control is one minute to make all your moves in the game, with 5 seconds increment per move. The tournaments are free. Casual (non-tournament) play is also free with some restrictions.

This server also runs automated Hex tournaments on Wednesdays.