The IMP table
The IMP table turns the score difference between two tables into IMPs (International Match Points): a difference of 20 to 40 points is 1 IMP, and 4,000 or more is 24 IMPs.
IMPs are used in team matches: the same board is played at two tables, and the difference counts. The scale makes a big swing count for more, but not without limit. VosBridge uses it when you look back at your boards: you see in IMPs how you did against the best possible result and against the bots at another table.
The IMP table
| Difference in points | IMPs |
|---|---|
| 0–10 | 0 |
| 20–40 | 1 |
| 50–80 | 2 |
| 90–120 | 3 |
| 130–160 | 4 |
| 170–210 | 5 |
| 220–260 | 6 |
| 270–310 | 7 |
| 320–360 | 8 |
| 370–420 | 9 |
| 430–490 | 10 |
| 500–590 | 11 |
| 600–740 | 12 |
| 750–890 | 13 |
| 900–1,090 | 14 |
| 1,100–1,290 | 15 |
| 1,300–1,490 | 16 |
| 1,500–1,740 | 17 |
| 1,750–1,990 | 18 |
| 2,000–2,240 | 19 |
| 2,250–2,490 | 20 |
| 2,500–2,990 | 21 |
| 3,000–3,490 | 22 |
| 3,500–3,990 | 23 |
| 4,000 or more | 24 |
Examples
Example 1: one more game
- ♠ K Q 9 7 4
- ♥ A 6
- ♦ K 8 3
- ♣ 7 5 2
You open 1♠ and reach 4♠ vulnerable. You make 10 tricks: 620. At the other table they stop in 2♠ and also make 10 tricks: 170. The difference is 450: 10 IMPs to you.
Example 2: an overtrick
- ♠ A 8 3
- ♥ K Q 5
- ♦ A J 9 4
- ♣ 7 6 2
You open 1NT and partner raises to 3NT. You make 10 tricks not vulnerable: 430. At the other table they make 9: 400. The difference is 30: 1 IMP. At IMPs the contract matters most, an overtrick much less.
Common mistakes
- Taking risks for an overtrick. At IMPs an overtrick is usually worth 1 IMP; going down costs far more. Play safe for your contract first.
- Missing a vulnerable game. Missing a making 4♠ easily costs 10 IMPs.
- Confusing IMPs with pairs scoring (match points). There every overtrick can matter as much as a game, because you only compare who scored more.
Today's boards in VosBridge are not scored in IMPs but like a pairs event: on each board you get 2 points for every player who did worse. See also: Bridge scoring
Practise this soon
In VosBridge you see in IMPs after every board how you did against the best result. VosBridge is not open to everyone yet: a small group of testers already plays.
Tell me when VosBridge opens
You will get one e-mail when VosBridge opens. First we send you an e-mail to confirm your sign-up.