EHAA (Every Hand An Adventure) is a highly natural bidding system in contract bridge characterized by four-card majors, sound opening bids, undisciplined weak two-bids in all four suits and a mini notrump, usually of 10–12 high card points.
Read more about EHAA: Weak Two-bids, Mini Notrump, Other Opening Bids, Defensive Bidding, Other Preempts