CHAPTER VIII
The Score 

LAW 77 - DUPLICATE BRIDGE SCORING TABLE 

TRICK SCORE
Scored by declarer's side if the contract is fulfilled
		IF TRUMPS ARE
For each odd trick bid and made
Undoubled								20	20	30	30
Doubled								40	40	60	60
Redoubled								80	80	120	120
				AT A NOTRUMP CONTRACT
			UNDOUBLED			DOUBLED			REDOUBLED
For the first odd trick bid and made			40			80			160
For each additional odd trick			30			60			120
A trick score of 100 points or more, made on one board, is GAME
A trick score of less than 100 points is a PARTSCORE
PREMIUM SCORE
Scored by declarer's side
SLAMS
For making a slam					Not Vulnerable				Vulnerable
Small Slam (12 tricks) bid and made					500				750
Grand Slam (all 13 tricks) bid and made					1000				1500
OVERTRICKS
For each OVERTRICK					Not Vulnerable				Vulnerable
(tricks made in excess of contract)
Undoubled					Trick Value				Trick Value
Doubled					100				200
Redoubled					200				400
PREMIUMS FOR GAME, PARTSCORE, FULFILLING CONTRACT
For making GAME, vulnerable											500
For making GAME, not vulnerable											300
For making any PARTSCORE											50
For making any doubled, but not redoubled contract											50
For making any redoubled contract											100
UNDERTRICK PENALTIES
Score by declarer's opponents if the contract is not fulfilled
UNDERTRICKS
(tricks by which declarer falls short of the contract)
	Not Vulnerable						Vulnerable
	Un-				Re-		Un-				Re-
	doubled		Doubled		doubled		doubled		Doubled		doubled
For first undertrick	50		100		200		100		200		400
For each additional undertrick	50		200		400		100		300		600
Bonus for fourth and
each subsequent undertrick	0		100		200		0		0		0

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			Difference			Difference
in points	IMPs		in points	IMPs		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 ++	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.

LAW 79 - TRICKS WON 

A. Agreement on Tricks Won

The number of tricks won shall be agreed upon before all four hands have been returned to the board.

B. Disagreement on Tricks Won

If a subsequent disagreement arises, the Director must be called. No increase in score need be granted unless the Director is called before the round ends as specified in Law 8 (but Law 69 or Law 71 may supersede this provision when there has been an acquiescence or a concession).

C.  Error in Score

An error in computing or tabulating the agreed-upon score, whether made by a player or scorer, may be corrected until the expiration of the period specified by the sponsoring organisation. Unless the sponsoring organisation specifies a later time, this correction period expires 30 minutes after the official score has been made available for inspection.