duplicate bridge scoring

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A sample bridge score sheet looks like :

north / south east / west
  
  

The points for tricks bid and made are registered below the horizontal line in the middle. All other points, such as overtricks, bonuses, undertrick penalties, are placed above the line. Only the points below the line are counted towards games.

fulfilled contract

trick score ( bid and made tricks, the points below the line. In doubled or redoubled contract, points are also doubled or timed by 4. A contract with this score of 100 points or more is a game. ) :

NT40 for the first trick and 30 for each subsequent trick
S / H30 per trick
D / C20 per trick

premium score ( the points above the line. contract score + slam score + overtrick score ) :

contract :
partscoregame, not vulnerablegame, vulnerable
50300500

doubled, not redoubledredoubled
50 ( additional )100 ( additional )

slam :
 not vulnerablevulnerable
small slam500750
grand slam10001500

overtrick :
 not vulnerablevulnerable
undoubledtrick scoretrick score
doubled100200
redoubled200400

undertrick penalty

  not vulnerablevulnerable
undoubleddoubledredoubled undoubleddoubledredoubled
first undertrick 50100200100200400
each additional undertrick 50200400100300600
additional bonus for fourth and
each subsequent undertrick
 100200    

International Match Points ( IMP )

difference in pointsIMPs difference in pointsIMPs difference in pointsIMPs
20 - 401 370 - 4209 1500 - 174017
50 - 802 430 - 49010 1750 - 199018
90 - 1203 500 - 59011 2000 - 224019
130 - 1604 600 - 74012 2250 - 249020
170 - 2105 750 - 89013 2500 - 299021
220 - 2606 900 - 109014 3000 - 349022
270 - 3107 1100 - 129015 3500 - 399023
320 - 3608 1300 - 149016 4000 & up24

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