Roche is a convention for use after the opponents have opened 1NT. It's fairly simple: A 2
overcall shows 12-14 HCP
, balanced or semi-balanced, with 3+ clubs. All other overcalls are natural.
The idea behind Roche is to try finding game opposite an ACOL weak 1NT
when your side holds two (semi-)balanced, 12+ point hands. Playing traditional methods, the auction might otherwise go 1NT-Pass-Pass-Pass
Responses to the 2 overcall
Responses to the 2 overcall are as follows.
|Pass ||4+ clubs, no 5-card suit, and no interest in game. For example, a weak 4333.|
|2||Natural, 5+ diamonds, non-forcing.|
|2||Natural, 5+ hearts, non-forcing.|
|2||Natural, 5+ spades, non-forcing.|
|2NT||Natural, invitational to 3NT.|
Roche originated in the UK but I don't know who (or where) it was named for. I also cannot find more information about the 3-level responses. Presumably they show good hands with invitational or game-forcing values. If you have any idea, please let me know.
Roche has since become obsolete in tournament play, in favor of more advanced 1NT defenses like DONT