Друри конвенциясы: Жақсы қолды көрсету және күшін бағалау жолы

The Drury convention is a bridge convention, used to show a game invitational major suit raise by a passed hand while guarding against a light opening by partner in third or fourth seat. It is initiated by an artificial and forcing 2 response by the passed hand to a 1 or 1 opening by partner. The 2 bid shows at least three card support for opener's suit with 10 12 support points and asks opener to clarify the strength of their opening hand. The convention is also known in Europe as "Toronto".

A rebid of 2 shows a full opening. While not universally accepted, a bid of 2 by opener after opening 1 is also a weakish bid showing five spades and four hearts (or better). With a good hand (say 15 or more points) opener may simply jump to game (four of the major suit). Other bids tend to be natural and descriptive, in effect a game try. With an excellent hand, opener may be interested in a slam and will bid accordingly.

In this variant, the passed hand with 10+ points responds 2 to show exactly three card support and 2 to show four card support or better. This may help opener evaluate the probability of a successful game contract.

If the passed hand has 10+ points and a real club suit (or a diamond suit, when playing two way Drury), this cannot be shown naturally at the two level. One possibility is that a jump to 3 (or 3) shows this hand. An alternative is to use the forcing notrump. A third possibility (and the one recommended when the convention was introduced) is to bid 2, then rebid three of the minor. If this last approach is used, opener must be careful about jumping in own suit without extra length.

The above examples are suitable for use with five card major systems such as Standard American. Variations are required for use with four card major systems such as Acol.