Chess-DB.com game preparation tool algorithmically evaluates your opponent games, your public games and your private opening repertoire/games (if maintained) and provides you with an overview as well as opening suggestions and lines to prepare before your game. Not always things will go your way in the actual game. There will be games in which your opponent will surprise you, deviate significantly from his past games, or purely outprepare you. Using our opening suggestions doesn't eliminate the chance of all this to happen, it just theoretically minimizes it. Note: This tool is currently in development (beta), expect more coming soon.