The Blue Club system uses the 2
opening to show any 4441 hand
with 17-24 hcp.
is an attempted signoff
is used an inquiry. The rebids are:
17-20, either major singleton
17-20, diamond singleton
/3
/3
/3NT
21-24, singleton in next
suit
(3NT = clubs) 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:
showing 17-20 with a heart singleton. 3
is used as a further inquiry into the strength:
(17-18)
17-18, spade singleton
19-20, spade singleton 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