Landy is the first bridge conventional defense against over opponent's 1NT opening and one of the 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.

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