Bridge Score

Basic Scoring

(A) Basic Score: if contract made, the declarer side can get this basic score.
 
Trump
Contract
Contract Made
Normal
Double
Redouble
Each level basic score
20
40
80
20
40
80
30
60
120
30
60
120
No-Trump
Contract
First level basic score
40
80
160
Remaining level's  basic score
30
60
120

If basic score is up to 100 or more, it is called Game, otherwise it is called a Non-Game.

(B) Bonus Score: Declarer gets the score.
 
Slam
Contract Made
Non-Vulnerable
Vulnerable
Small Slam (12 Tricks)
500
750
Grand Slam (13 Tricks)
1000
1500
Game or Non-Game
Non-Game
50
50
Game
300
500

If contract made and double, 50 points bonus added.
If contract made and redouble, 100 points bonus added.
 
Up-Trick Bonus
Each Up-Trick
Non-Game
Game
Normal
Trick score
Trick score
Double
100
200
Redouble
200
400

(C)  Penalty Score: If contract not made, defender side can get this score.
 
Each Down Trick Penality Score
Normal
Double
Redouble
First Trick
Non-Vulnerable
50
100
200
Second and Third Tricks
50
200
400
Remaining Tricks
50
300
600
First Tricks
Vulnerable
100
200
400
Remaining Tricks
100
300
600

Example:
 
Board #
Vulnerable
Declarer & Contract
Result
North South Score
East West Score
1
Nil
S-4
+0
420
-
2
NS
E-3NT
-1
50
-
3
EW
S-2 x
+1
280
-
4
Both
S-4
+2
680
-
5
NS
E-6
+0
-
920
6
EW
W-3NT x
-2
500
-
7
Both
E-5
+1
-
620
8
Nil
S-2 x
+2
470
-
9
EW
N-4 x
-3
-
500
10
Both
N-1NT
+1
120
-
11
Nil
W-3
+2
-
200
12
NS
E-1NT xx
+1
-
760
13
Both
N-7
+0
2140
-
14
Nil
N-5
+1
480
-
15
NS
S-3NT x
-3
-
800
16
EW
W-5
+1
-
620

1) South played 4 , got 10 tricks. Contract was just made.

Basic score: 4 x 30 = 120. (Basic score up to 100, a game).
Bonus score: 300 (Non-vulnerable).

North-South side got 120 + 300 = 420 points.

2) East played 3NT, got 8 tricks. Contract was down 1. North-South got 50 points penalty score.

3) South played 2 , and doubled, got 9 tricks. Contract was up 1.

Basic score: 2 x 40 = 80. (Non-game)
Bonus score: 100 (double and up 1 trick), 50 (double bonus), 50 (non-game bonus).

North-South side got 80 + 100 + 50 + 50 = 280 points.

4) South played 4 , got 12 tricks. Contract up 2 tricks.

Basic score: 4 x 30 = 120. (game)
Bonus score: 2 x 30 = 60 (up trick score), 500 (vulnerable game bonus).

North-South side got 120 + 60 + 500 = 680 points.

5) East played 6 , got 12 tricks. Contract was just made.

Basic score: 6 x 20 = 120. (game)
Bonus score: 300 (non-vulnerable game bonus), 500 (non-vulnerable small slam bonus).

East-West side got 120 + 300 + 500 = 920.

6) West played 2NT, doubled and got 6. Contract down 2.

Penalty score: 200 + 300 = 500 (vulnerable).

7) East played 5 , got 12 tricks. Contract up 1.

Basic score: 5 x 20 = 120 (game).
Bonus score: 20 (up trick score), 500 (vulnerable game bonus).

East-West side got 120 + 20 + 500 = 620 points.
 

Match Point (MP)

Match point are used for pairs tournaments. Normally North-South and East-West are compared separately. For example, a tournament has n-tables, the top pair on one side will got 2 * (n - 1) MP, and the second top pair gots 2 * (n - 2) MP, so that the bottom pair will got 0 MP. So, for each board, one top pair on each of the two sides will got the same top MP. Also, for pairs on a side play the same result, the MP will average out among these pairs.
 

Internation Match Point (IMP)

IMP are used in team playing, the IMP is got from the different score obtained by 2 teams for the same board. It is based on a convertion table shown below:-
 
Score Different
IMP
Score Different
IMP
20-40
1
750-890
13
50-80
2
900-1090
14
90-120
3
1100-1290
15
130-160
4
1300-1490
16
170-210
5
1500-1740
17
220-260
6
1750-1990
18
270-310
7
2000-2240
19
320-360
8
2250-2490
20
370-420
9
2500-2990
21
430-490
10
3000-3490
22
500-590
11
3500-3990
23
600-740
12
4000+
24

Victory Point (VP)

VP is used for averaging out the effect to the overall result when a team lost badly in a team match. It is based on a table and have the upper win/loss point. The following is an IMP to VP point scale table:-
 
Board / VP
8
12
14
16
20
24
28
32
15:15
0-1
0-1
0-2
0-2
0-2
0-3
0-3
0-3
16:14
2-5
2-6
3-7
3-7
3-8
4-9
4-10
4-10
17:13
6-8
7-9
8-10
8-11
9-12
10-14
11-15
11-16
18:12
9-11
10-12
11-14
12-15
13-16
15-19
16-20
17-22
19:11
12-14
13-16
16-18
16-19
17-21
20-24
21-25
23-28
20:10
15-17
17-20
19-22
20-23
22-26
25-29
26-31
29-34
21:9
16-20
21-24
23-26
24-27
27-31
30-34
32-37
35-40
22:8
21-23
25-28
27-30
28-31
32-36
35-39
38-43
41-46
23:7
24-26
29-32
31-34
32-36
37-41
40-45
44-49
47-52
24:6
27-29
33-36
35-38
37-41
42-47
46-51
50-55
53-58
25:5
30-33
37-40
39-43
42-46
48-53
52-57
56-61
59-65
25:4
34-37
41-45
44-48
47-52
54-59
58-64
62-68
66-73
25:3
38-41
46-50
49-54
53-58
60-65
65-71
69-76
74-82
25:2
42-45
51-55
55-60
59-64
66-72
72-79
77-85
83-91
25:1
46-50
56-61
61-66
65-71
73-79
80-87
86-94
92-100
25:0
51+
62+
67+
72+
80+
88+
95+
101+