3.3 Responses to 1♦

West	North	East	South
	1♦	Pass	?

1♥	4+ Hearts, 4 (Ace)+ HCP
1♠	4+ Spades, 4 (Ace)+ HCP
1NT	6-9 HCP, denies 4M
2♣	4+ Clubs, 10+ HCP, forcing to 2NT or 3m by either hand, denies 4M
2♦	5+ diamonds, 10+ HCP, forcing to 2NT or 3♦ by either hand, denies 4M
2♥	6+ Hearts, 0 - 5 HCP, no Ace unless only card
2♠	6+ Spades, 0 - 5 HCP, no Ace unless only card
2NT	10-12 HCP, denies 4M, has good lead values (otherwise, bid 2♦ or 2♣)
3♣	6+ clubs, 0 - 5 HCP, no Svr unless only card, denies 4M
3♦	5+ diamonds, 6 - 9 HCP, denies 4M (Preemptive Jump Raise)
3♥	5+ Diamonds, small singleton heart, slam try
3♠	5+ Diamonds, small singleton spade, slam try
3NT	13-15 HCP, balanced hand, denies 4M, has good lead values (otherwise, bid 2♦ or 2♣)
4♣	5+ diamonds, small singleton club, definitely a slam try since past 3NT
4♦	RKCB for diamonds
4♥	7 Winners with hearts as trump, no void, no Ace outside of hearts
4♠	7 Winners with spades as trump, no void, no Ace outside of spades

Note About 1♦ - 2♣

Please don’t confuse this with a 2/1 game force auction. Since there is no forcing notrump response to 1♦ with which to respond with the invitational hands, it isn’t practical to make the 2♣ response forcing to game. Opener’s rebids after 1♦ - 2♣ will be much the same as after 1♦ - 2♦.