Mark bridge

The mark of the bridge describes the way in which the calculation of the points to the Bridge is established. Accountancy is relatively complex and evolved/moved with the wire of time.

History

Traditionally, the “partly free bridge” is held in two sleeves gaining with a calculation separated in two groups:

the points of handle which make it possible to gain the sleeve;
the premiums and the penalties which reward the success or punish the failure of the required contract, but do not hope to gain the sleeve.

This very clear separation is attenuated in the modern forms.

The basic principles were however preserved:

the points are not allotted that with only one camp
the points of handle depend exclusively on the contract required and succeeded;
the value of the contracts (points of handle, premiums and penalties) is increased in the event of Against or of Surcontre .

Vulnerability

The vulnerability is a concept inherited the “partly free bridge” which causes to make more expensive the liftings of fall, but also the premiums of success certain contracts.

the camp having gained a sleeve is known as vulnerable ;
the camp not having gained yet of handle is known as nonvulnerable .

The vulnerability causes to diversify the situations of opposition and brings a supplement of interest to the play. It is applied today in all shapes of the bridge of competition. Generally made there follow one another they are given where:

nobody is vulnerable: everyone green ;
only one camp is vulnerable: green against red , then red against green ;
the two camps are vulnerable: everyone red .

Points of handle

These points are allotted only for the liftings actually required in the contract. Surlevées are the subject of a separate account.

If the informant makes his contract, one counts the number of liftings carried out (beyond the sixth) and one multiplies it by a factor depend on the color of the contract:

20 for the minor ones (and),
30 for the major ones (and).
40 for the first lifting with no trumps; 30 points for each of the following ones.

Premiums

Precede surlevée

The liftings of better (liftings carried out, but not requested) are added simply to the required contract, and count only like premium . In the event of against or of surcontre, their value is modified: to see the table below.

Precede the partial one

If the required contract is lower than the sleeve (< 100 points), in addition a premium of 50 points, known as premium of partial (or of good played ).

Examples:

2 pays (2 X 30) + 50 = 110 points.
3 pays (3 X 30) + 50 = 140 points.
2 SA pays (40 + 30) + 50 = 120 points.
2 required SA, but 9 liftings carried out (1 of more) pays: 40 + 30 (value of the liftings requested) + 50 (premium of partial) + 30 (surlevée) = 150 points.

Precede of handle

As soon as the value of the liftings of the contract reached or exceeds 100 points, the contract is a handle . The premium of handle is of 300 points, if the camp is not-vulnerable, or of 500 points if it is vulnerable.

Lower limit of the contract for the attribution of the premium of handle:

with no trumps: 3SA;
in the major ones: 4,4;
in the minor ones: 5,5.

Examples:

5, vulnerable pays (5 * 20) + 500 = 600 points.
4, nonvulnerable pays (4 * 30) + 300 = 420 points.
3SA, nonvulnerable pays (40 + (2 * 30)) + 300 = 400 points.

Precede slam

The small slam is a contract with the stage of six: the informant commits himself making 12 liftings (all liftings except one). The Grand Slam is with the seven stage: all the 13 liftings should be made. As for the sleeve, the premium of slam depends on the vulnerability. The premium of slam is added to the premium of handle:

nonvulnerable small slam

: 500 points;
vulnerable: 750 points.

Large nonvulnerable slam

: 1000 points;
vulnerable: 1500 points.

Examples:

6, vulnerable: (6 X 30) + 500 + 750 = 1430 points.
7 SA, nonvulnerable: (40 + (6 X 30)) + 300 + 1000 = 1520 points.

Against and Surcontre

When the contract is countered , the value of the liftings is affected.

If the contract succeeds, the value of the required liftings double.

for a countered and successful contract of 2, the full value of the liftings is equal to 2x2x30=120 points. It thus gives right to a premium of handle;
curiously, the premium of partial of 50 points is also maintained.

If the camp is vulnerable, (2 * 60) + 50 + 500 = 670 points, whereas the successful contract of 4 is worth only 620 points.

The double surcontre the value of all the liftings, successful or dropped, and of the premium of partial, but not the premiums of handle and slam.

Raised of fall and surlevées

A contract falls when the informant does not make the number of liftings announced.

In the event of fall, the points of penalties are entered (positively) for defense, the camp which ruined the contract. The penalties depend only on the number of missing liftings, of the vulnerability of the informant and owing to the fact that countered it was countered , surcontré or not.

For a contract not countered , one counts 50 points per nonvulnerable lifting of fall, and 100 points per vulnerable lifting of fall.
In the event of against or of surcontre , the formula of computation is established so that raised N of vulnerable fall costs as much as n+1 raised of nonvulnerable fall.

For example, 4 liftings of nonvulnerable countered falls cost (100+200+200+300) = 800 points, as much as 3 vulnerable lifting of falls (200+300+300).

The table below summarizes the values of the liftings of fall and surlevées in all the situations.

External bonds

the mark in duplicate by World Bridge Federation (in English)
How to Keep Score (in English): Very complete, with the various alternatives of mark (Duplicate, By team, Robre, Chicago)

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