The discussion regarding the double below seems to be correct. Basically it promises support for the unbid suits or a gameforcing hand.For the lebensohl part it just means that opener bids 2N with a minimum, and 3 of a suit with max. Over 1N (2H) we get X take out 2S to play or a weak invitation. 2N GI+ with clubs or signoff with diamonds 3C GI+ with diamonds 3D GI+ with spades 3H GF 4144 3S GF 55 minors If the opponents bid show two suits we get 1N (2H showing both majors) X takeout of both majors (pass + double is penalty) 2S GI 1444 (not optimal use i guess) 2N GI+ with clubs or signoff with diamonds 3C GI+ with diamonds 3D GF 4144 3H GF 1444 3S GF 55 minors If they don't show any suit 1N (2D any major) X - diamonds, to play or weak invite (with a takeout D you have to start with a pass) 2M - to play or weak invite 2N GI+ with clubs 3C GI+ with diamonds 3D GI+ with hearts 3H GI+ with spades 3S GF 55 minors and if they have shown three suits i think you can extrapolate our scheme :-) Basically, 2S is competitive, 2N is GI with lowest unbid suit or signoff, 3C is GI+ with second lowest unbid suit, etc. for each suit they have shown we have a 4441 GF available, and 3S is GF with 55 in lowest unbid suits. If they bid something that shows any suits then X is takeout of those suits, otherwise X shows the suit they bid (and a takeout double passes the first round). Pass + D of initially known suit is penalty D.