A territory game bearing similarities to Go, but where a group is defined as alive by forming a structure called an Orbit or a half-orbit (or in some variants, a quarter-orbit), and the capturing of stones work differently.

More details, including the full rules, are available at the author's webpage at http://home.fuse.net/swmeyers/orbit.htm.

Online Play

• Gamerz (turn-based, play by email or play by web)