Learn Bridge Very Slowly
Apprenez Le Bridge Pas a Pas
Jacques Lumbroso
 
NORTH EAST SOUTH WEST
Pass Pass Pass 1D
X Pass Pass 1H
Pass 2C 2S Pass
Pass 3C 3S X
Pass Pass XX Pass
Pass 4C X XX
Pass Pass Pass  
5) SCORING, PART 2
A)
Part-score bonus

When playing in a club tournament, every contract bid and made
(with or without overtricks) that gives a trick score of 90 or less(called a
“part-score”, as it is below the level of a game score) gets a bonus of 50 points(called a “part-score bonus”).
So in fact:
.1C bid, seven tricks made, the score is 20+50=70 (not 20).
.2H bid, eight tricks made, the score is (2X30)+50=110 (not 60).
In this last case, where 110 points are scored, the 300 points game bonus is not scored, as only 60 trick points were scored(at least 100 trick points are required for a game bonus).
.2S bid and ten tricks made, the score is (2X30)+30+30+50=170
(not 120). The two overtricks get 30 points each, and the bonus is only 50 points, as only 60 trick points were scored.

So, in effect, every contract bid and made(with or without overtricks) gets a bonus. It is either a bonus of 50 if the contract was for 90 trick points or less, or a bonus of 300 if the contract was for 100 trick points or more.

B) Slams

.When two partners bid a contract at the 6 level(6C, 6D, 6H, 6S or 6NT), called a
“small slam”, and make at least twelve tricks, they score an extra-bonus of 500 points, on top of the game bonus of 300 points.
Example: 6H bid and twelve tricks made, the score is: (6X30)+300+500=980.
.When two partners bid a contract at the 7 level(7C, 7D, 7H, 7S or 7NT), called a
“grand slam”, and make thirteen tricks, they score an extra-bonus of 1000 points, on top of the game bonus of 300 points.
Example: 7D bid and thirteen tricks made, the score is: (7X20)+300+1000=1440

C) Double and Redouble

During the bidding, if a player thinks that the opponents will not make their contract, he can say
“Double” at his turn to bid, instead of saying Pass or any other bid. If the Double is followed by three passes in succession, then the contract is said to be “doubled”. The play of the cards proceeds as usual. Declarer has to make the same number of tricks as stated in the contract, with or without overtricks, but the score changes:

-if the contract is made, with or without overtricks, the points scored by the two partners that bid the contract are increased, more or less doubled.
-if the contract goes down, the points lost are also increased, more or less doubled.
Now that adds to the fun!
If the Double is not followed by three passes in succession, in other words if the Double is followed by a bid before there are three passes in succession, then the Double is cancelled. But of course any bid can be doubled, so another Double could appear in the bidding afterwards.
If one of the two partners that have been doubled feels confident that the contract can be made, with or without overtricks, he can say
“Redouble” at his turn to bid, instead of saying Pass or any other bid. If the Redouble is followed by three passes in succession, then the contract is said to be “redoubled”. The play of the cards proceeds as usual. Declarer has to make the same number of tricks as stated in the contract, with or without overtricks, but the scores changes considerably:
-if the contract is made, with or without overtricks, the points scored by the two partners that bid the contract are considerably increased, more or less quadrupled.
-if the contract goes down, the points lost are considerably increased, more or less quadrupled.
Now that really adds to the fun!
If the Redouble is followed by a bid before there are three passes in succession, then the Redouble is cancelled, and the preceding Double is also cancelled. But as we know, any bid afterwards can also be doubled, and redoubled.
A Redouble cannot be doubled again, etc… , otherwise the score could amount to millions of points!
Only an opponent can double a bid, and only a member of the pair that has been doubled can redouble.

On the score sheet, “X” is written after the contract if it is doubled, and “XX” is written after the contract if it is redoubled. For example:
.1NT doubled with one overtrick is written 1NTX + 1.
.5H redoubled with two undertricks is written 5HXX - 2.

The following table shows an example of bidding that contains doubles and redoubles. North is Dealer:

A few comments on the above auction:
.even though the first three players have passed in the first round of bidding, the fourth(West) may still bid.
.only an opponent may double(X) a bid.  East, instead of bidding 2C, may make any other bid(superior to 1H), or pass, but cannot double his partner’s bid of 1H.
.only a player of a pair that has been doubled may redouble(XX) a bid.  West doubled South’s 3S bid. After North passed, East may pass or make any bid superior to 3S, but cannot redouble. Only North or South could redouble.
.4C redoubled is the contract.
.East is Declarer.
.South makes the opening lead.
.West is Dummy.

Keep playing a few games at home with your friends.