Template:R1F

Responder's bids are very similar to those he makes after partner opens One of a Suit.
If RHO bids immediately after partner's Double, Responder should still make one of the constructive bids below if he can, apart from the 'dustbin' bid 1NT. (1NT acts as a relay to enable Doubler to bid his suit, but is not needed if the opponents bid to enable the auction to return to Doubler.)

Box R1F (Version 1.0)	Responder's bid when responding to a 1st-round Double
Doubler's Bid	Responder's Bid	Meaning	Forcing?	Doubler's Rebid	Meaning	Forcing?	Responder's Rebid	Meaning	Forcing?
Double of One of a Suit	One of a Suit	5+ card suit, 8-16 HCP, compliant with Rule of 18	NF			NF			NF
	Two of a Suit	6+ card suit, 3-16 HCP	NF			NF			NF
	Three of a Suit	4+ card suit, 17-22 HCP	F			NF			NF
	1NT	0-9 HCP, no other bid available	NF			NF			NF
	2NT	10+ HCP, 4+ cards in at least one of the suits that doubler might have	NF			NF			NF
	Pass	"I would have bid 1NT if RHO had not bid immediately after partner's Double."	NF			NF			NF
	Double	"RHO's bid immediately after partner's Double has taken away the bid I was going to make, which was not 1NT."	F			NF			NF
Double of Two or Three of a Suit or of 1x:2x, 1x:3x, 2x:3x, 1x:2NT or 2x:2NT	Suit bid at cheapest level	Up to 11 HCP, 4+ card suit	NF			NF			NF
	Jump-bid of a new suit	12-14 HCP, 5+ card suit	NF			NF			NF
	3NT	14+ HCP, stopper in their suit(s)	NF			NF			NF
Double of 1NT	Suit bid at cheapest level	Up to 11 HCP, 4+ card suit	NF			NF			NF
	Jump-bid of a new suit	12-14 HCP, 5+ card suit	NF			NF			NF
	3NT	14+ HCP, stopper in their suit(s)	NF			NF			NF
'Negative' Double of RHO's Overcall e.g. 1♦:(1♥):Dbl:(Pass)	Suit bid at cheapest level	Up to 11 HCP, 4+ card suit	NF			NF			NF
	Jump-bid of a new suit	12-14 HCP, 5+ card suit	NF			NF			NF
	3NT	14+ HCP, stopper in their suit(s)	NF			NF			NF