A novice chess player, I recall beating my son frequently when he was 9 (yes, I was almost 39, finding him too thoughtful to be fooled by a false win). Over the years, he has returned like Aragorn to claim his dominion over his chess subjects (often me). In the process, he pointed me to a couple of online chess sites that offer training puzzles. If I’ve learned anything from these puzzles it is that you leave your opponent with as few (good) choices as possible. As a result, you know your opponent’s decisions before they are made, allowing you to anticipate your future moves.