Staveley Wriggle

The Staveley Wriggle is a bidding convention after your side has opened 1NT and the opponents have doubled for penalty. It uses natural responses except for a "multi"-like 2 response that either shows clubs OR one of several different two-suited hands.

Partner		Opp 1		You		Opp 2
1NT		Dbl		?

Partner		Opp 1		You		Opp 2
1NT		Pass		Pass		Dbl
?

After the opposing double, the "wriggle" bids as follows.

Bid	Meaning
Pass	Natural, weak.
Redouble	Natural. Shows a good, balanced hand interested in playing 1NT redoubled.
2	One of the following hand types: 4+ clubs, natural. May be 4432 or even 4333. A two-suiter in diamonds and hearts (at least 4-4). A two-suiter in diamonds and spades (at least 4-4). A two-suiter in hearts and spades (at least 4-4). Partner is expected to pass 2. If the opponents pass too, then you're playing 2 whether you're in a 2-2 fit or not! If the opponents do double, then the 2 bidder can either pass (with clubs) or show a two-suiter: Redouble shows diamonds and hearts. Partner must bid 2 or 2 (the latter with longer hearts). 2 shows diamonds and spades. Partner passes with diamond tolerance, or corrects to 2 with longer spades. 2 shows hearts and spades. Partner passes with heart tolerance, or corrects to 2 with longer spades.
2	5+ diamonds, non-forcing.
2	5+ hearts, non-forcing.
2	5+ spades, non-forcing.

The 2 bid is pretty creative, but what I dislike about the Staveley Wriggle is the inability to show clubs + another suit. Most escape systems can't show a weak 4333 hand, and the Staveley Wriggle is no exception. But it compounds the problem with its inability to show any 4432 distribution that includes 4 clubs.

The Staveley Wriggle originated in the UK, where a "wriggle" system for 1NT-doubled has the same meaning as an "escape" or "runout" system in the U.S. It was presumably invented by Stuart Staveley, former vice president of the English Bridge Union and long-time bridge player.