Making a bid in bridge depends upon the number of high-card points in an individual's hand and the distribution of his cards between the four suits. An opening bid is made if a hand has 12 or more high-card points and a suit with at least four cards.
Except for a few exceptions, a person would pass if his hand did not meet the minimum high-card point count and a long-enough suit. High-card points are calculated with aces counting as four points, kings as three points, queens as two points and jacks as one point each. When responding to an opening bid, the high-card points and cards in a suit requirements are different than to open bidding. Bidding is used in bridge for two partners to find an eight-card fit between the two hands with the right amount of high-card points to play a contract.