CoG may refer to:

• Center of gravity
• Central of Georgia Railway
• Continuity of Government
• Covenant of the Goddess

A cog is a tooth of a gear or cogwheel or the gear itself.

Chess is a two-player board game played on a chessboard, a checkered gameboard with 64 squares arranged in an eight-by-eight grid. Chess is played by millions of people worldwide, both amateurs and professionals.

Chess is a two-player board game.