Spade Heart Dorking Bridge Club Diamond Club
Defence to 1NT

1NT if you can play in it undoubled is a great contract in duplicate.

So if your opponents bid it, try to compete, but natural bidding can often be penalised by a double.

 

Double

The key agreement is what does a double of 1NT mean.

Most players use a double for penalties.

Multi Landy

A useful defence to 1NT.

This is a detailed summary https://www.bridgebum.com/multi_landy.php

2   At least 5-4 or 4-5 in hearts and spades.
2   5+ hearts or 5+ spades (no side suit).
2   At least 5-5 in hearts and a minor.
2   At least 5-5 in spades and a minor.
2NT   At least 5-5 in clubs and diamonds.