Editing 500 (card game) (section)

===Breach rule (related to the set rule)===
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Breach indicates that a non-bidding team intends to breach the contract of a bidding team by at least one more trick than is actually necessary to break the contract. As opposed to the Setting rule, Breach must be called on a per hand basis, and does result in additional scoring. Typically, Breach is not played in a game when the setting rule is being used.

A single player from a non-bidding partnership may call to breach another team's contract after a successful bid for a seven-trick (or more) contract has been made. The breach call may be made before or after the contracting team picks up the kitty, but must be made before game play starts. Typically, a breach occurs at one trick more than is actually necessary to break the bidding team's contract. In other words, 5 tricks in a 7-trick bid, 4 tricks in an 8-trick bid, 3 tricks in a 9-trick bid, 2 tricks in a 10-trick bid. However, for misère, open misère, and double misère a breach always occurs at 3 tricks.

A breach call can result in three different scenarios:

;Win/lose: If the bidding team successfully fulfills its contract, then it receives the full points of the original bid, and the team calling breach loses points.

;Lose/lose: If the bidding team does not fulfill its bid, but the opposing team does not take the necessary number of tricks to perform a breach, then the bidding team loses the point value of the original bid, and the team calling breach loses the predetermined value of the breach call.

;Lose/win: If the bidding team loses its bid by the pre-established number of tricks, then the bidding team loses the contract points, and the team calling breach gains the predetermined value of the breach call.

Because breach is not considered an actual bid, a team may not win or lose (“go out the back door”) based on points gained or lost from a breach call.

A player who calls breach but does not fulfill the conditions of breach (win/lose or lose/lose scenario) is not allowed to bid in the next round. A player who bids a seven-trick contract but is successfully breached by an opponent (lose/win scenario) is not allowed to bid in the next round.