(Down - Up - Top)
SC 1.2 - What does VULNERABLE mean ?
Vulnerability of a side too raises the stakes in terms of points scored for a contract considerably.
This aspect of the game was used in the original Rubber bridge style game, where a side became vulnerable after having reached a certain score level.
In modern Duplicate bridge this aspect has been maintained in an artificial way by designating the Vulnerability of a side on each board played as follows :
ROTATION of VULNERABILITY
Board | Dealer | Vulnerable
|
| Board | Dealer | Vulnerable
|
1 & 17 |
N |
None |
| 9 & 25 |
N |
East-West |
2 & 18 |
E |
North-South |
| 10 & 26 |
E |
All |
3 & 19 |
S |
East-West |
| 11 & 27 |
S |
None |
4 & 20 |
W |
All |
| 12 & 28 |
W |
North-South |
| |
|
5 & 21 |
N |
North-South |
| 13 & 29 |
N |
All |
6 & 22 |
E |
East-West |
| 14 & 30 |
E |
None |
7 & 23 |
S |
All |
| 15 & 31 |
S |
North-South |
8 & 24 |
W |
None |
| 16 & 32 |
W |
East-West |
For boards 17 - 32 (and boards 33 - 48) the sequence as for boards 1 - 16 is repeated
|
(Down - Up - Top)
SC 1.3 - When to use IMP scoring
International Match Points (IMPs) are used in competitions between two or more Teams.
Each Team consists of 4 players. Two of the players form a NS pair, the other two form an EW pair.
With two Teams playing against each other, the NS pair of Team 1 plays against the EW pair of Team 2 on one table.
On the other table the NS pair of Team 2 plays against the NS pair of Team 2.
This way both teams cover all 4 hands of each deal.
Halfway the match one Team may switch its pairs from EW to NS and visa versa, so that all four players of each team play against all players of the other team.
At the end of the match the point score for each board is added up and the total converted into International Match Points.
Board
| Contract
| NS T1
| EW T1
| Total T1
| IMPs T1
|
| NS T2
| EW T2
| Total T2
| IMPs T2
|
1
| 3NT
| 430
| -400
| 30
| 2
|
| -430
| 400
| -30
| -2
|
2
| 4S
| -420
| -50
| -470
| -10
|
| 420
| 50
| 470
| 10
|
3
| 3D
| 110
| -110
| 0
| 0
|
| -110
| 110
| 0
| 0
|
Team 2 wins 10/2 over Team 1.