Duplicate Bridge Scoring Summary

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Tricks contracted for and taken over 6

• Minors: 20 each
• Majors: 30 each
• Notrump: 40 for 1st and 30 for each additional
• If doubled or redoubled: multiply by 2 or 4 respectively
• If the result is 100 or more then it's a game, otherwise a partscore

Overtricks

• Undoubled: 20 each for minors, 30 for majors and notrump
• Doubled: nonvulnerable 100 each, vulnerable 200 each
• Redoubled: twice that for doubled

Bonuses

• Bidding and making a below-game (partscore) contract: 50
• Bidding and making game: 300 nonvulnerable, 500 vulnerable
• Small slam (bid of 6 made): 500 nonvulnerable, 750 vulnerable
• Grand slam (bid of 7 made): Double the small slam bonus
• Making a doubled contract: 50, or 100 if redoubled

Undertricks

• Undoubled nonvulnerable: -50 per trick
• Undoubled vulnerable: -100 per trick
• Doubled nonvulnerable: -100 for 1st, -200 for 2nd and 3rd, -300 thereafter.
• Doubled vulnerable: -200 for 1st, -300 thereafter.
• Redoubled: twice that for doubled