International match points (IMP) within the card game of contract bridge is a measurement for conversion of absolute contract bridge scores. The total point difference between two scores is compared to a scale ranging from 0 to 24 to obtain an IMP score.
+ Revised IMP table effective September 1, 19622017 World Bridge Federation IMP Table, Law 78Point differenceIMPsPoint differenceIMPsPoint differenceIMPsfromtofromtofromto0100370420917501990182040143049010200022401950802500590112250249020901203600740122500299021130160475089013300034902217021059001090143500399023220260611001290154000 or more242703107130014901632036081500174017
IMP scoring is used in competitive bridge, including duplicate bridge (including on some online bridge websites),at press play and then on the top right corner, "IMP" and scroll the question mark but rarely in any kind of companion bridge, and never when playing rubber bridge.
Optimal tactics at IMPs differ from those of matchpoints and are similar to those for rubber bridge. When playing for IMPs the declarer's primary objective is to make the contract without jeopardizing it in a quest for overtricks; for the defense it is to defeat the contract without worrying about surrendering overtricks.
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