Here’s a bidding guide for deciding whether to double an opponent’s contract. It’s called the Rule of Nine. It works as follows.

Don’t help your opponents. That’s simple enough in concept but more complex in action.

Have you heard about the Rule of One? I hadn’t either, until my playing partner Paul Laliberte showed me.

Pre-empts can be fun for bidders and hellish for opponents. Here’s perhaps the most satisfying interference bid I’ve seen.

The traditional opening lead against a NoTrump contract is fourth from the top card in leader’s longest suit. Subtract that number from 11 to establish the number of higher cards in the other three hands.

How many high-card points does a partnership need to bid 6NT? About 32, but fewer when there’s a running suit.