Cappelletti

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This article concerns contract bridge and uses terminology associated with the game. See Contract bridge glossary for an explanation of unfamiliar words or phrases.

Cappelletti (often misspelled Cappeletti, also called Hamilton and Pottage) is bridge convention used for interventions over opponents' 1NT opening. Its invention is usually attributed to Mike Cappelletti, but origin of the concept is also claimed by Fred Hamilton, John Pottage and Gerald Helms.

Over 1NT, the intervening opponent can artificially overcall in second or fourth position, showing a one-suited or a two-suited hand:

2 ♣ shows one-suited hand (usually, 6 or more cards). The partner is supposed to:
- bid 2♦ with a weak hand, where the overcaller is supposed to correct, or
- bid 2NT with a strong hand, (overcaller bids the suit)
2♦ shows both major suits (at least 5-4),
2♥ shows hearts and a minor,
2♠ shows spades and a minor,
2NT shows both minor suits.
Double is a penalty double. Per partnership agreement, generally 15-17 pts or 16-18 pts.