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Responder may also jump to 3 of any suit (except 3 ♣, which is signoff) to show a game-forcing hand with a good suit or, if the jump is in one of opener's suits, two of the top three honors. Although it is mandatory in the XY Notrump form of the convention to complete the relay 2 ♣ to 2 ♦ , when Z was a suit, opener may be unlimited.
Bridge base basic, also known as BBO basic, is a bidding system for the game of bridge based on the Standard American Yellow Card (SAYC). It is simplified, suitable for beginners, and widely used in internet bridge, particularly on Bridge Base Online . [ 1 ]
In all cases they show a hand which is close to game forcing. For balanced hands, a 2 ♣ bid shows 22 or more points in Standard American (Yellow Card), and 23 or more points in standard Acol. For unbalanced hands, the typical strength is about 9 or more playing tricks, or 3 losers or less if using Losing-Trick Count.
In the card game contract bridge, the Losing-Trick Count (LTC) is a method of hand evaluation that is generally only considered suitable to be used in situations where a trump suit has been established and when shape and fit are more significant than high card points (HCP) in determining the optimum level of the contract.
With 1NT used for balanced hands in the 12-14 HCP range, responder to a 1 ♣ or 1 ♦ opening knows that partner has either a good hand, 15-17 balanced, or an unbalanced hand with genuine length in minor suit. If opener has a three-card minor, he most often has a strong notrump hand; then, if desirable, it is easy to veer into no trump ...
Limit Raises: A jump-raise of the opener's suit by responder, in the absence of opponent interference, is invitational to game. In Goren's system, this was a strong game-forcing raise. Notrump openers show a balanced hand, with the following common high card point (HCP) ranges: 1NT = 15-17 HCP; 2NT = 20-21 HCP; 3NT = 25-27 HCP
1 ♦ is used on all weak hands, 0-7 HCP. 1 ♥ shows 8 or more HCP and an unbalanced hand with no major (or 22 or more HCP, a balanced hand with no major). 1 ♠ is "mini-notrump" with 8-12 HCP — denying a 4-card or longer major; 1NT shows 13-18 HCP — denying a 4-card or longer major; 2NT shows 19-21 HCP — denying a 4-card or longer major.
The responder will have five points or more and an unbalanced hand. The responder bids 3 ♣, which asks opener to bid his four-card suits in ascending order. If clubs are the only four-card suit, the opener bids 3NT. If there are two four-card suits (one being clubs), the opener bids the higher first and then 3NT for the clubs if no fit is found.