at
level 3, if a player
bids 4
he
controls 
but he does not
control .
In other words, counter to classical controls, he controls the cheaper color(s) but he does not
control the color that he bids.
The negative controls or anti controls are the opposite of the classical (or positive controls.
For instance
after a an agreed fit at
level 3, if a player
bids 4 he
controls but he does not
control .
In other words, counter to classical controls, he controls the cheaper color(s) but he does not
control the color that he bids.
The most part of players use the classical controls which are generally sufficient. But occasionally the negative controls are necessary as complement. Here are some examples.
| 1 |
1 |
| 3 |
4
(control ,
but no ) |
4 (what means ?) |
What may mean the bid 4 by opener?
After 4 which denies
control . If the opener
had no control , he would have closed
to 4.
If he had control
and the opener would have bidded 4NT Blackwood,
since the responder has
control
Therefore, the bid 4 is a negative control which means
that the opener has contol but no
control ,
and requires the responder to bid 4NT Blackwood if he has
control , if not to close
to 4
On the other hand, if the responder bids the control instead
of 4, all is classical :
- After 4,
if the opener bids 4, it is a
classical control which denies the control , because
if he had controls
and he would have bidded 4NT
Blackwood instead of 4. This
bid 4 requires the opener
to bid 4NT whith control , if not to close
at 4.
- After 4, if the opener
bids 4, it is also a
classical control which denies the
control . This bid
4 requires the responder to bid 4NT whith
control , if not to close
at 4.
As rule, a negative control may only be necessary when the first bidded control denies at least
a control in cheapers color. The most often when
control is denied but no always.
By previous example, if the opener opens 1
instead of 1, no change :
| 1 |
1 |
| 3 |
4
(control , but no
) * |
| 4(no
control ). End |
|
| 4(control
,
but no ) ** |
|
| 4NT(control
and ) ** |
* The opener has opened 1 but has not
inevitably the control . The
bid 4 is a control, but
does not mean inevitably a double fit
and .
** 4 is a negative control which requires the
responder to bid 4NT whith control , if not to
close at 4.
This case occurs not so often by fit 44 at , because
the control is at disposal. But this may
also occur. For instance :
| 1 |
1 |
| 3 |
4
(control , but no
) |
| 4
(no control ). End |
4
(control , but
no ) * |
4NT (control
and ) |
* 4 is a negative control which requires the
partner to bid 4NT Blackwood if he controls , if not to
close at 4.
When the fit 44 in a major is agreed at level 2, some players have better the bid 3NT as requiring a first control, but this does not change anything :
| 1 |
1 |
| 3 |
3NT (requires controls) |
| 4
(control , but
no ) |
|
| 4(no
control ). End |
|
| 4
(control but
no ) * |
|
| 4NT(control
and ) |
* 4 is a negative control which requires the
opener to bid 4NT whith control , if not to close
at 4
| 1 |
2 |
| 2SA(strong 15HCP+) | 3 (fit and slam hope) |
| 4
(control but
no ) |
|
| 4 (no
control ). End |
|
| 4
(control ,
but no ) * |
|
| 4NT (contrôle ,
and ) |
* is a negative control which requires
the partner to bid 4NT with control , if not to close
at 4
After 3 by responder, the opener has at his
disposal the bid 3NT to show the bad quality of his trumps.
and :
| 1 |
2 |
| 2NT(strong 15HCP+) | 3 (fit and slam hope) |
| 4
(control but
no ) |
|
| 4 (no
control ). End |
|
| 4
(control ,
but no ) * |
|
| 4NT (control ,
and ) |
* is also a negative control.
By opening 1 and
fit , the opener has the control
bid 3 at his disposal. But a negative control may
be necessary. Example :
| 1 |
2 |
| 2NT(strong 15HCP+) | 3 (fit and slam hope) |
| 4
(control but
no ) * |
4
(no control ). End * |
| 4
(control , but
no ) ** |
|
| 4NT (control , and
) |
* The opener had the control bid 3 at his disposal but
has not used it. He has no control .
** 4 is a negative control which requires the
responder to bid 4NT with control , if not to
close at 4.
| 1 |
4(Splinter) |
| 4 (anti control) * |
|
| 4SA (Blackwood) ** |
* Control but no
** Control and
Idem after 1 -
1 -
4(splinter)
In another context, see also Controls
Choice of mode Read or Print :
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Once mode "Print" has been selected, use the command Print of your computer
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