So when you get scores in bridge such as +420 for making 4 spades non-vulnerable and the other team scores say +170 for making 4 spades but not bidding it…you can see there is a difference of 250 points…but how do those points reflect to the IMP’s?
Here is a handy IMP scoring 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 |
| 900-1090 | 14 |
| 1100-1290 | 15 |
| 1300-1490 | 16 |
| 1500-1740 | 17 |
| 1750-1990 | 18 |
| 2000-2240 | 19 |
| 2250-2490 | 20 |
| 2500-2990 | 21 |
| 3000-3490 | 22 |
| 3500-3990 | 23 |
| 4000+ | 24 |