Sandwich 1NT

Example:  1 - Pass - 1 - 1N

1N shows the two unbid suits - clubs and hearts in the above example - and 5-10 HCP.

This is similar to the Unusual 2N and Michaels except those conventions show 11+ HCP.

Responses:

Partner bids the suit he likes best.

A jump raise is preemptive.

A cuebid is invitational to game.

Pros and Cons:

In the Nov.2022 Bridge Bulletin, p.56, Jerry Helms says of the Sandwich Notrump convention that he thinks that a better use of the 1N bid (when the opponents have bid different suits) is to show stoppers in those suit and a strong hand, such as KJ AQ8 QJ75 KJ85 with bidding of 1-P-1-1N.