Adding Mustard to Your Sandwich
The Sandwich NT has been around for quite awhile as an alternative to a takeout double immediately after opponents have bid two suits. Generally both bids are used, but the Sandwich NT shows different features than the takeout double depending upon partnership agreement – I. e, more (or less) defense, strength, distribution (at least 5-5), etc.
I propose the following version (esp. at MP’s): the ONLY difference should be that the Sandwich NT guarantees at least five of any unbid major. This allows partner to compete in a major when holding only a three card suit, which is unlikely to happen if not playing this version of Sandwich NT. In fact, the only time it will happen in current versions of Sandwich NT after the auction 1m – P – 1M is when the NT bidder happens to hold five of the other minor along with his five card major (since otherwise he will make a takeout double and partner will presume he has only a four card major); this seems to be an overly restrictive requirement.