[Fluffy]

I play 2♦ 0-7, rest nat, it is not really good, but it helps us to remind to open 2♣ the least we can . Actually for us 2♣ is at least 50% of the time balanced, since we open a lot at the 1 level; and 2♣-2X-3X is a common auction for us.

[ucrman]

I like an immediate 2H second negative. I had found that the auctions following 2D improved because there was no need for a second negative by responder since I played the 2D response as a game force. I like the 2C opener to have more quick tricks than losers.

However, the auctions after the 2H second negative response were somewhat shaky. So, I came up with the following (opener bids 2S as a relay to 2NT with most two suiters):

2C - 2H

2S - relays to 2NT but responder can bid a 7+-card suit headed by Q
      2NT - forced relay
            3C - Nonforcing, shows 4+ Cs with a 5 card M.
                3D asks for the 5-card M.
            3D - Nonforcing, shows 4+ Ds with a 5-card M.
                 3H (4H) - Asks opener to pass with 5 Hs or else bid 3S (4S).
                3S (4S) - Asks opener to pass with 5 Ss or else further desribe the hand with 5 H's.
            3H - Nonforcing, shows Hs > or = to Ss.
                4C, 4D - Slam try, 3+ card support, singleton or void in the suit bid.
            3S - Nonforcing, shows Ss > Hs.
                4C, 4D - Slam try, 3+ card support, singleton or void in the suit bid.
            3NT - Shows a 4-4-4-1 hand, any singleton.
                4C - asks for the short suit, opener makes the next bid above the singleton.
                4D, 4H, 4S - opener corrects to next higher suit with a singleton in that suit.
                4NT - Slam try - asks opener to bid at 5-level or the 6-level in the lowest suit, searching for a fit.
            4C - forcing, shows 4+ Cs and a 5-card M.
                4D asks for the 5-card M.
            4D - forcing, shows 4+ Ds with a 5-card M.
                4H - Asks opener to pass with 5 Hs or else bid 4S.
                4S - Asks opener to pass with 5 Ss or else bid 4NT, 5C, or 5D with 5 Hs.
            4H - Nonforcing, shows Hs > or = to Ss.
            4S - Nonforcing, shows Ss > Hs.
            5C - Equal length in the minors.
            6C - Equal length in the minors.
2NT - 22-23 (24) balanced.
3C, 3D - Natural and forcing, 5+ in the suit.
3H, 3S - Natural, nonforcing, 6+ card suit.
    3S, 4C, 4D - Slam try, 4+ card support, singleton or void in the suit bid.
3NT - 24-27, balanced.
4C - Forcing, showing 6+ Cs with a 4-card M.
    4D asks for the 4-card M.
4D - Forcing, shows 6+ Ds with a 4-card M.
    4H - Asks opener to pass with 4 Hs or else bid 4S.
    4S - Asks opener to pass with 4 Ss or else bid 4NT, 5C, or 5D with 4 Hs.
4H - natural, for play.
    4S, 5C, 5D - Slam try, 3+ card support, singleton or void in the suit bid.
4S - natural, for play.
    5C, 5D, 5H - Slam try, 3+ card support, singleton or void in the suit bid.
5C, 5D - Natural for play.