Landy is the first bridge conventional defense against over opponents' 1NT opening and one of first conventions ever introduced. It was invented by Alvin Landy.

Over 1NT, the overcall of 2♣ shows both major suits, while all other bids are natural. Requirements for the overcall vary from partnership to partnership: some require 5-5, some 5-4, and yet others only 4-4 (provided the overall strength is sufficient). The partner can take a preference to either major or make a non-forcing bid of a suit; 2NT is used as a forcing query.

Various modifications have appeared over years, by various authors.

See also

• List of defenses to 1NT