International match points (IMP) within the card game of contract bridge is a measurement for conversion of the absolute contract bridge scores. The total point difference between two scores is compared to a scale ranging from 1 to 24.[1][2]
| Point difference | IMPs | Point difference | IMPs | Point difference | IMPs | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| from | to | from | to | from | to | |||||
| 0 | 10 | 0 | 370 | 420 | 9 | 1750 | 1990 | 18 | ||
| 20 | 40 | 1 | 430 | 490 | 10 | 2000 | 2240 | 19 | ||
| 50 | 80 | 2 | 500 | 590 | 11 | 2250 | 2490 | 20 | ||
| 90 | 120 | 3 | 600 | 740 | 12 | 2500 | 2990 | 21 | ||
| 130 | 160 | 4 | 750 | 890 | 13 | 3000 | 3490 | 22 | ||
| 170 | 210 | 5 | 900 | 1090 | 14 | 3500 | 3990 | 23 | ||
| 220 | 260 | 6 | 1100 | 1290 | 15 | 4000 or more | 24 | |||
| 270 | 310 | 7 | 1300 | 1490 | 16 | |||||
| 320 | 360 | 8 | 1500 | 1740 | 17 | |||||
IMP score is used in competition bridge, including duplicate bridge (including at some online bridge websites),[4] but rarely within any kind of companion bridge, and never if playing rubber bridge.[5]
Tactics at IMPs differ from those of matchpoints and are similar to those of rubber bridge. 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.[6]
References
- ↑ "IMP: International Match Point Scoring - Duplicate Bridge". www.bridgehands.com.
- ↑ "IMPs and Matchpoints". www.math.cornell.edu.
- ↑ 2017 World Bridge Federation IMP Table, Law 78
- ↑ at press play and then on the top right corner, "IMP" and scroll the question mark
- ↑ MayHem. "Things you might like to know about duplicate bridge" (PDF). omahabridge.org. UNIT 241 Board of Directors.
- ↑ Manley, Brent; Horton, Mark; Greenberg-Yarbro, Tracey; Rigal, Barry, eds. (2011). The Official Encyclopedia of Bridge (7th ed.). Horn Lake, MS: American Contract Bridge League. p. 421. ISBN 978-0-939460-99-1.
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