Reduce the Rack
As your Scrabble game comes to a close, it's time to roll out a few end-game strategies. Although you'll continue to draw new tiles and adapt to your opponent's moves, you'll also need to spend time calculating probabilities before making your next move in order to reduce the high-point tiles in your rack.
First, though, it's important to understand why this matters. When you have leftover tiles in your rack at the end of the game, you must deduct the sum of these tiles from your score. If, however, you are the proud owner of an empty rack, you get to add the sum of your opponent's remaining tiles to your score. How you handle your end-game strategy of rack reduction could very well determine the outcome of a close game.
Keep track of your opponent's rack. You'll want to note the number of tiles left in the bag and calculate what letters they might represent based on what has already been played on the board. It's a debatable practice to some, akin to counting cards, but it's a common practice at tournaments and in competitive clubs [source: Meyers].