It's a two-player game with three standard boards: 9x9, 13x13 and 19x19. You can perform an unlimited number of undos, and the score window only shows prisoners, not territory.
When each player has passed, the dead groups are removed, and the sum of prisoners and territory is displayed along with the actual score.
To focus your search you can use a full search window in Spotlight. view it
We show you how to use the Google Search tool from Gmail Labs so that you can conduct searches without leaving your email window view it
How to use the chat window in Adium, including some handy tips and tricks view it
Nest, separate and manage your chat windows easliy with Adium view it
Gmail's recently added Tasks feature helps keep your to-do list in check view it
Chat and connect with friends in Windows Live Messenger view it