Opener shows 11-15 HCP (sometimes 10), 6 diamonds, and denies a 4 card major.
Most sequences have analogs to the 2♣ Opener, except we don't need to find
4-4 major suit fits.
Basic Responses
- 2♥ALERT,2♠ALERT - 8-10 HCP, 5+ card suit, NF. Either tolerance for
♦ or prepared to play 3M opposite 0-1.
- Pass - 2-3 support, no game interest
- 3♦ - prefer ♦ to M. Responder can Pass or bid 3M to play.
- Other - natural; game try in M
- 2NTALERT - artificial, invitational or better. See below.
- 3♣ALERT - forces Opener to bid 3♦. After which:
- Pass - weak diamond raise
- 3♥ALERT - 5-5 in spades and clubs, game forcing
- 3♠ALERT - 5-5 in hearts and clubs, game forcing
- 3NTALERT - 5-5 in hearts and spades, NF
- 4♣ALERT - 5-5 in hearts and spades, not willing to play 3NT
basically, you bid the suit you don't have
- 3♦ALERT - transfer to hearts, showing 6 cards and invitational or
better. Opener accepts the transfer without game interest,
or bids naturally
- 3♥ALERT - transfer to spades.
- 3♠ALERT - 5+ clubs, GF
- 3NT - to play
- 4♣ - RKC for diamonds
- 4♦ - preemptive, weak
- 4♥, 4♠ - to play
- 4NT - quantitative invite
2NT Asking Bid
- 3♣ALERT - minimum, no 3 card major
- 3♦ALERT - minimum, at least one 3 card major
- 3♥ALERT - maximum, <3 hearts
- 3♠ALERT - maximum, 3 hearts, <3 spades
- 3NTALERT - maximum, 3=3=6=1 or 3=3=7=0
- 4♣ - 5 clubs
- 4♦ - spade void, 3 hearts
- 4♥ - heart void, 3 spades
Generally speaking, Responder's bids are natural except 4♦ is RKC for
diamonds. Some exceptions:
After 2♦-2NT-3♣ showing a minimum with no 3 card major,
- 3♦ - to play
- 3M - shows Hxx, encouraging Opener to bid 3NT with Hx
After 2♦-2NT-3♦ showing a minimum with one 3 card major,
Responder's 3M shows a 5 card suit and is forcing to 3NT or 4♦.
After 2♦-2NT-3♥ denying hearts
Responder's 3♠ is a 5 card suit forcing to 3NT or 4♦.
Interference
If the opponents interfere, we bid naturally, with X being negative.