How to use TWIC files for study I'd like some feedback and suggestions on how you use The Week In Chess pgn/cbv files for study. Here are a few things I do with them:

1. Play from a won position - here we go down the list of decided games and using a chess engine, get to the point in the game where the evaluation flips to +/- 2.00 or greater. Play the game out at that point against the computer and try and find a winning continuation.

2. Update your repertoire - Using the ECO Keys, gather the games in your main repertoire from the TWIC file and at least review those games and possibly add them to your repertoire games database. This allows you to see potential new ideas and how to play certain middle-games coming out of your repertoire.

3. Hold the Draw - Take a drawn game and jump in and play it against the computer and try and hold the ending with 10-20 moves left. Try it from both sides, alternatively. This ii a great way to understand endgame play.

4. Defend your King - this is the opposite of #1 - Take the losing position and try to defend it. You might want to consider reducing the +/- to  a pawn down on the comp. valuation. This is good defensive practice when in a worse position.

Just some thoughts...
Grandmaster Larry Christiansen recommends studying 200 recent games per week from games that relate to your opening repertiore.  TWIC is ideally suited for doing that.