ChessDB is an application that lets you bring hundreds of thousands of chess games with you on your iPad.
Features include:
+ Dozens of databases included with hundreds of thousands of games
+ Several annotated lessons already downloaded, including: "Masters of the Chess Board", "Middle Game Lessons", and "Annoted Immortal Games"
+ Download your own databases to ChessDB, or drag and drop them from your computer to your iPad through iTunes
+ Play through variations and FEN positions
+ Several chess puzzles included