Helvig Defense to 1NT Doubled submitted by benjyacol

1NT - Dbl - ?

Pass forces a Rdbl, with either:

• values, willing to play 1NT redoubled (Pass at next call shows this)
• or 4333 shape (next call will be the 4-card suit)

Rdbl is an unspecified 5-card suit and is a relay to 2

2/2/2/2

• either lower ranking of two suits (4-4),
• or exclusion bid (suit is singleton with 4441 shape) (Rdbl after opponents double the exclusion suit shows this hand)