The Blue Club system uses the 2 opening to show any 4441 hand
with 17-24 hcp.
After the inquiry, responder can signoff at any time except in the relay suit (opener's short suit, except 2NT over 2 - 2
- 2
is considered the relay).
For 17-20 hands, (except for the 2 - 2
- 2
auction... see below) The first relay ask asks for the range:
The second relay asks for controls
The third relay asks for the number of queens:
For 21-24 hands The first relay asks for the number of controls
The second relay asks for the number of queens.
2![]() |
Pass | 2![]() |
Pass |
2![]() |
Pass | 2NT*** | Pass |
* inquiry, ** 17-20, major singleton, *** 2NT is used as a further inquiry:
Over the 3/3
responses, the next relay asks for controls; then another relay asks for number of queens.
Examples of auctions:
2![]() |
Pass | 2![]() |
Pass |
2![]() |
Pass | 2NT*** | Pass |
3![]() |
Pass | 3![]() |
Pass |
4![]() |
Pass | 4![]() |
Pass |
5![]() |
Pass | 7NT |
* inquiry, ** 17-20, major singleton, *** 2NT is used as a further inquiry, **** 3 shows 17-18 spade singleton, ***** 3
is the next relay asking controls, ****** 4
the (4th step) shows 6 controls, ******* 4
is the next relay asking for queens, ******** 5
- (2nd step) shows 1 queen.
2![]() |
Pass | 2![]() |
Pass |
2![]() |
Pass | 3![]() |
* inquiry, ** 17-20, major singleton, *** signoff
2![]() |
Pass | 2![]() |
Pass |
2![]() |
Pass | 2NT | Pass |
3![]() |
Pass | 3![]() |
|
3NT*** | Pass | 4![]() |
Pass |
4NT***** | Pass | 6![]() |
* 3 shows 17-20 heart singleton, ** 3
asks strength, ***
3NT shows 19-20. **** 4
asks for controls, ***** 4NT (2nd step) shows 4 control
2![]() |
Pass | 2![]() |
Pass |
3![]() |
Pass | 3![]() |
Pass |
3![]() |
Pass | Pass |
* inquiry, ** 3 (17-20 diamond singleton), *** 3
relay, **** 3
shows 17-18,
Pass places the contract
2![]() |
Pass | 2![]() |
Pass |
3![]() |
Pass | 3![]() |
Pass |
3NT*** | Pass | 4![]() |
Pass |
5![]() |
Pass | 6![]() |
* 3 (21-24 heart singleton), ** 3
relay for controls,
*** 3NT (2nd step) 6 controls, **** 4
relay asking for queens, ***** 5
(4th step) 3 queens
2![]() |
Pass | 2![]() |
Pass |
2NT** | Pass | 3![]() |
Pass |
* inquiry, ** 2NT 17-20 club singleton, *** 3 signoff