LAWS OF DUPLICATE CONTRACT BRIDGE 1997
Definitions Preliminaries Preparation General Laws The Auction The Play Proprieties The Score Sponsorship Tournament Director Appeals


CONTENTS INDEX
LAWS
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
26 27 28 29 30
31 32 33 34 35
36 37 38 39 40
41 42 43 44 45
46 47 48 49 50
51 52 53 54 55
56 57 58 59 60
61 62 63 64 65
66 67 68 69 70
71 72 73 74 75
76 77 78 79 80
81 82 83 84 85
86 87 88 89 90
91 92 93
LAW
78
METHODS OF SCORING_

A. Matchpoint Scoring
In matchpoint scoring each contestant is awarded, for scores made by different contestants who have played the same board and whose scores are compared with his, two scoring units (matchpoints or half matchpoints) for each score inferior to his, one scoring unit for each score equal to his, and zero scoring units for each score superior to his.
B. International Matchpoint Scoring
In international matchpoint scoring, on each board the total point difference between the two scores compared is converted into IMPs according to the following scale.
Difference
in points
IMPs Difference
in points
IMPs Difference
in points
IMPs
20-40 1 370-420 9 1500-1740 17
50-80 2 430-490 10 1750-1990 18
90-120 3 500-590 11 2000-2240 19
130-160 4 600-740 12 2250-2490 20
170-210 5 750-890 13 2500-2990 21
220-260 6 900-1090 14 3000-3490 22
270-310 7 1100-1290 15 3500-3990 23
320-360 8 1300-1490 16 4000 & upward 24
C. Total Point Scoring
In total point scoring, the net total point score of all boards played is the score for each contestant.
D. Special Scoring Methods
Special scoring methods are permissible, if approved by the sponsoring organisation. In advance of any contest the sponsoring organisation should publish conditions of contest detailing conditions of entry, methods of scoring, determination of winners, breaking of ties, and the like.




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