Ways to alert Edit
The following is only the general procedure, regulations may be different from the following.
When bidding orally, the partner of the player making the alertable call immediately says the word alert, but nothing else.
Using a bidding box Edit
The partner of the player making the alertable call immediately throws the alert card (in blue) toward the alertable call, and take it back after the next opponent calls.
Using a bidding sheet Edit
The partner of the player making the alertable call immediately circles the alertable call.
When playing through a computer Edit
The player presses the alert button before making his call, and the alert can be seen by the opponents only.
Pre-alert and delayed alert Edit
By regulation, some calls need to be pre-alerted or alerted after the auction.
Pre-alerts are used when unusual systems are in use, by saying the agreed system before the round. There is no pre-alerts in EBU.
Delayed alerts are used after high-level bids. The declarer of the dummy alerts the calls before making the opening lead, the defenders alert the calls after making the opening lead but before facing it up.
If 1♠ is forcing for one round by an unpassed responder, it requires no alert, but if it is non-forcing, it requires an alert.
If 1NT shows 10-12, it requires an alert.
Most notably, the following treatments require an alert:
- Weak jump shift
- Inverted minor raise
- weak raise to 3 of a major when Bergen raises are in effect
- natural 2♣ openings
- natural intermediate or higher 2-level openings
- natural and non-forcing new suit response to a natural suit opening
- natural and non-forcing new suit or 2NT response to a weak two opening
- natural cue-bids
- strong jump overcall
- natural direct jump 2NT overcall
- low-level penalty doubles
- strong 1NT rebids by opener (such as 1♣-1♦-1NT showing 16-18)
Moreover, extremely aggressive methods or methods that is usually completely unfamiliar to the opponents need to be pre-alerted, for example:
- light openings (fewer than 11 HCPs)
- very light overcalls (fewer than 6 HCPs by agreement, and/or frequently overcalling with 4-card suits at the 2-level)
- very light preempts (e.g. opening weak two on bad 5-card suits or opening at the 3-level with most 5-card suits or preempting frequently on Qxxxxx or less)
- two-system methods (this applies to fundamentally different systems, not minor variations such as 1NT opening range)
- leading low from two small
- special carding methods
All conventions require an alert, except the following:
- Stayman, asking for a four-card major by a non-jump ♣ bid after a natural NT opening, however, the following variants need to be alerted:
- Puppet Stayman, asking for a 5-card major;
- Non-promissory Stayman, but alert only when it becomes clear from the sequence that the Stayman bidder does not have a 4-card major.
- Checkback Stayman, after a 1NT or 2NT rebid by opener (excluding rebids after a strong, artificial opening, which is treated as an opening).
- Strong two clubs and 2♦ response as either negative or waiting
- Conventional 2NT response to natural two-level openings.
- 4NT Blackwood and 4♣ Gerber:
- All other ace-asking sequences must be alerted, but if it is at or above 3NT and at or after the opener's second turn to bid, it must be delay alerted.
- Conventional NT overcalls by a passed hand;
- Unusual notrump overcall;
- Most doubles or redoubles;
- Natural penalty doubles at a low-level or support doubles have to be alerted.
- Most cuebids (e.g. (1♦)-2♦ showing some two-suiters not including diamonds)
Some methods which may be unfamiliar to opponents require a pre-alert, for example, unusual conventional openings (such as a strong and conventional 1NT opening), relay systems, and all methods permitted in the mid-chart and the super-chart but not the general convention chart.
The following are alertable, all others are not:
- short minor systems;
- non-takeout doubles;
The following conventions are non-alertable, all others are:
- takeout doubles;
The following are announced rather than alerted: