# The Big NT system

This is a system that can be played without conventions (not even Stayman!), so it it particularly good for beginners.
 1 12-20 HCP, 2+ 1 12-20 HCP, 4+ 1 12-20 HCP, 5+ 1 12-20 HCP, 5+ 1NT 21 (24)+, any distribution. Partner MUST bid! CONVENTION 2 = 0 - 3 HCP 2 Weak Two in 2 Weak Two in 2 Weak Two in 2 Weak Two in 2NT 21 - 23 balanced
In this system, 1NT is the only forcing opening bid. Opening bids are generally made with 12 HCP, approximately using the rule of 20.

Opening bid rules
• You are allowed to open 1/ if you have at least 5 cards in the suit.
• You are allowed to open 1 if you have at least 4 cards in the suit.
• If more than one suit is allowed, open the longest of these suits.
• If still more than one suit is allowed, open the higher of these suits.

Examples
5 3 0 5: Open 1, the highest of and .
5 1 6 1: Open 1, the longest of , and .
1 4 4 4: Open 1, the highest of and .
4 3 3 3: Only is allowed. Open 1.

Further bidding. Both players find out in what range they are. Opener's ranges are:
• 11 - 15: Weak
• 16 - 17: Medium
• 18 - 20: Strong
Responder's ranges are:
• 6 - 10: Weak
• 11 - 12: Medium
• 13+: Strong
Weak hands try to stop as low as possible, medium hands make a game try and strong hands force to game. Opposite a game try, a weak hand tries to see if he has something extra, which is needed for the game.

### Bidding with fit

Weak hands establish the fit on the 2-level, medium hands on the 3-level and strong hands bid game.

### Bidding without fit

Responding to 1-bids
• Weak hands have to stay on the 1-level, so they either bid a new suit (forcing) or 1NT. If you have a good 6-card suit that you could instead bid at the 1-level and a weak hand you can bid a Weak Two as response to partner's opening bid.
• Medium hands can go to the 2-level, so they bid their long suit (forcing) or bid 2NT.
• Strong hands bid their suit or bid 3NT.

Opener's rebid
• After a possibly weak bid, the maximum level for weak hands is returning to the opened suit.
• With medium hands, one can bid a new suit even if it is higher than two in the opened suit. If no suits are worth mentioning, bid 2NT, or 3 in the opened suit.
• With strong hands, one can also jump to the 3-level to show a suit if it is lower than the opened suit. Therefore a sequence like 1 - 1 - 2 can be passed, although responder must be aware that it could have been bid on a medium hand. Suits bid on the 1-level are always forcing. One can also bid 3NT without anything else worth mentioning.

After a new suit on the 2-level (medium or better), the game try can be declined with 3 bids: Bidding one of the two known suits as cheaply as possible or 2NT. Anything else accepts the invitation and is forcing to game.

### Examples

1 (better minor) - 1 (forcing)
2 (minimum with fit) - 4 (still want game)

1 (better minor) - 1 (forcing)
2NT (medium balanced) - 3 (another suit)