An alternative to Hamilton/Cappelletti is DONT. Some claim it is better against a strong 1NT opening than Hamilton/Cappelletti because you are less likely to penalize the 1NT opener.
Responding to partner's bid - Now What?
The opponents open 1NT. How do you compete? Various methods are available. One such method is Hamilton/Cappelletti. It is known in the West as Hamilton, after one of it's authors, Fred Hamilton of Las Vegas, Nevada. Another method, DONT, invented by Marty Bergen, is possibly more effective against strong 1NT openings, but this is open to debate.
You should compete if there is a reason to do so. Any bid you make shows values.
You overcalled. Partner bid. Now What?
When and how should you compete after partner makes an overcall?
The Overcall is the framework of most defensive bidding.
Defending Against Two Suited Overcalls covers a wide range of possible sequences. It is helpful, however, to have a standard approach to the problem.
There are several two suited overcalls in bridge. We'll cover the most popular, Michael’s Cue bid and Unusual Notrump.
The Opponents start the bidding. What methods can the defense use? A Takeout double is one approach. There are many, many more possibilities.