The Lea System is based on the 1965 privately published book, authored by Mr. Robert H. Lea of St. Paul, Minnesota, United States, entitled Bridge is Easy With The Lea System, with a Foreword by Leonard Smith. The system is based on a strong, forcing 1 Club opening, which promises 12 plus high card points.

The Opening Bids

Bid Values Meaning
1 : 12+ high card points Shows various shapes.
1 : 15-16 high card points Shows a 6-card plus Diamond suit.
1 : 15-16 high card points Shows a 6-card plus Heart suit.
1 : 15-16 high card points Shows a 6-card plus Spade suit.
1 NT: 12-14 high card points Promises balanced shape.
2 : 6-11 high card points Shows a 6-card plus Club suit.
2 : 6-11 high card points Shows a 6-card plus Diamond suit.
2 : 6-11 high card points Shows a 6-card plus Heart suit.
2 : 6-11 high card points Shows a 6-card plus Spade suit.
2NT: 12-14 high card points Distribution: 5-4 or 5-5 in both Minor suits.

1 Club Opening Bids

Since the 1 Club opening may show various shapes, the opening of 1 Club may not include any holding, which may be opened with a weak No Trump range of 12-14 high card points. Since the Lea bidding system, in the hand evaluation, also includes distributional points as well as high card points, an opening of 1 Club may not be made with any holding valued at 15-16 points and a 6-card suit. These holdings are always reserved for one of a suit opening. If the holding does not fall within these two exceptions, then the opening should be 1 Club.

The responses to a 1 Club opening will always show point count first. The length of the suit is irrelevant and these responses are absolutely artificial in nature. The first responses are shown below showing the point count range held by the responder.

Opener Responder Meaning
1 1 Shows 0-5 points.
1 Shows 6-8 points.
1 Shows 9-11 points.
1 NT Shows 12-14 points.
2 Shows 15-17 points.
2 Shows 18-20 points.

The partner of the opener is forced to bid, even with no points. The 1 Club opening is forcing for one round. Any first response of 1 No Trump or higher is game forcing.

The following two examples should assist in clarifying the bidding sequences.

West East Meaning
AK87
Q43
AQ65
K7
 
QJ6
AK65
J83
Q95
1 1 NT Responder has game-forcing values; 12-14 points.
1 Opener shows a 4-card Spade suit.
2 Responder shows a 4-card Heart suit.
3 Opener shows a 4-card Diamond suit.
3 NT Responder realizes no fit and bids No Trump.

In the example above, the responder is unable to bid the Club suit, showing a stopper, since the level of the contract would exceed 3 No Trump.

West East Meaning
KQ873
Q94
AQ
A762
 
64
AK1065
K83
975
1 1 Responder shows 9-11 points.
2 Opener shows a 4-card Spade suit.
3 Responder shows a 4-card Heart suit.
4 Opener shows a 4-card Club suit and a 5-card Spade suit.
4 Responder must temporize to show a 5-card Heart suit.
4 Responder bids game in Hearts.

The concept behind the bidding system, which Mr. Robert H. Lea devised, is that the responder, with the very first response, shows the range of values held. Once the total number of values held is known by one partner, then the level of the contract is somewhat established. All rebids show at least a 4-card suit, whereas a second rebid shows a second 4-card suit and a longer first bid suit.

 

 

If you wish to include this feature, or any other feature, of the game of bridge in your partnership agreement, then please make certain that the concept is understood by both partners. Be aware whether or not the feature is alertable or not and whether an announcement should or must be made. Check with the governing body and/or the bridge district and/or the bridge unit prior to the game to establish the guidelines applied. Please include the particular feature on your convention card in order that your opponents are also aware of this feature during the bidding process, since this information must be made known to them according to the Laws of Duplicate Contract Bridge. We do not always include the procedure regarding Alerts and/or Announcements, since these regulations are changed and revised during time by the governing body. It is our intention only to present the information as concisely and as accurately as possible.

 


     
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