Editing Contract bridge (section)

=== Scoring ===
{{main|Bridge scoring}}
At the end of the hand, points are awarded to the declaring side if they make the contract, or else to the defenders. Partnerships can be {{gcb|vulnerable}}, increasing the rewards for making the contract, but also increasing the penalties for undertricks. In rubber bridge, if a side has won 100 contract points, they have won a {{gcb|game}} and are vulnerable for the remaining rounds,{{Sfn|Gibson|1974|p=138}} but in duplicate bridge, vulnerability is predetermined based on the number of each board.<ref name="duplaw2">[[#duplicatelaws|Laws of Duplicate Bridge]], Law 2, p. 6.</ref>

If the declaring side makes their contract, they receive points for {{gcb|odd tricks}}, or tricks bid and made in excess of six. In both rubber and duplicate bridge, the declaring side is awarded 20 points per odd trick for a contract in clubs or diamonds, and 30 points per odd trick for a contract in hearts or spades. For a contract in notrump, the declaring side is awarded 40 points for the first odd trick and 30 points for the remaining odd tricks. Contract points are doubled or quadrupled if the contract is respectively doubled or redoubled.{{Efn|If the declaring side makes a contract of 3NT and takes exactly nine tricks, fulfilling the contract (6&nbsp;+&nbsp;3), they receive 40 points for the first odd trick, and 60 (30&nbsp;×&nbsp;2) points for the remaining odd tricks, adding up to 100 contract points. If the contract was doubled or redoubled, the declaring side receives 200 and 400 points respectively. Additional bonus points may apply depending on the variation played; for example, in duplicate bridge, the declaring side is awarded a game bonus for having won 100 or more contract points, which is 500 if vulnerable, for a total of 600 points (500 + 100), or 300 if not vulnerable, for a total of 400 points (300&nbsp;+&nbsp;100).}}

In rubber bridge, a partnership wins one game once it has accumulated 100 contract points; excess contract points do not carry over to the next game. A partnership that wins two games wins the rubber, receiving a bonus of 500 points if the opponents have won a game, and 700 points if they have not.<ref name="law72to74">[[#rubberlaws|Laws of Rubber Bridge]], Law 72–74, pp. 34&ndash;35.</ref>

Overtricks score the same number of points per odd trick, although their doubled and redoubled values differ.<ref name="law81" /><ref name="duplaw77">[[#duplicatelaws|Laws of Duplicate Bridge]], Law 77, p. 95.</ref> Bonuses vary between the two bridge variations both in score and in type (for example, rubber bridge awards a bonus for holding a certain combination of high cards),<ref name="law81" /> although some are common between the two.

A larger bonus is awarded if the declaring side makes a small slam or grand slam, a contract of 12 or 13 tricks respectively. If the declaring side is not vulnerable, a small slam gets 500 points, and a grand slam 1000 points. If the declaring side is vulnerable, a small slam is 750 points and a grand slam is 1,500.<ref name="law81" /><ref name="duplaw77" />

In rubber bridge, the rubber finishes when a partnership has won two games, but the partnership receiving the most ''overall'' points wins the rubber.<ref name="law72to74" /> Duplicate bridge is scored comparatively, meaning that the score for the hand is compared to other tables playing the same cards and match points are scored according to the comparative results: usually either "matchpoint scoring", where each partnership receives 2 points (or 1 point) for each pair that they beat, and 1 point (or {{1/2}} point) for each tie; or IMPs (international matchpoint) scoring, where the number of IMPs varies (but less than proportionately) with the points difference between the teams.<ref name="duplaw77" />

Undertricks are scored in both variations as follows:<ref name="law81" /><ref name="duplaw77" />
{|class="wikitable"
!rowspan="3"|Undertricks
!colspan="6"|Points per undertrick
|-
!colspan="3"|Vulnerable
!colspan="3"|Not vulnerable
|-
!Undoubled
!&nbsp;Doubled&nbsp;
!Redoubled
!Undoubled
!&nbsp;Doubled&nbsp;
!Redoubled
|-
|1st undertrick
|rowspan="3" align=center|100
|align=center|200
|align=center|400
|rowspan="3" align=center|50
|align=center|100
|align=center|200
|-
|2nd and 3rd, each
|align=center|300
|align=center|600
|align=center|200
|align=center|400
|-
|4th and each subsequent
|align=center|300
|align=center|600
|align=center|300
|align=center|600
|}