Trial bids

Long suit trial bid asks for support in the suit bid. Exception is after 1♥ - 2♥. Here 2♠ is Short suit mode and 2NT asks for support in ♠.

In competition it is possible, that we can not ask in particular suit, so our bid asks for that suit ans suit(s) below. If there is no oom for a bid, then double is a general trial bid.

example: 1♠ - (pass) - 2♠ - (3♥) - dbl

Short suit mode trial bid is triggered by bidding 2♠ after 1♥ - 2♥ or 2NT after 1♠ - 2♠.

We ask RE in which suit he holds potential useless values if we hold a singleton or void in that suit. 

After 1♥ - 2♥ - 2♠,  2NT shows useless values in ♠.

Trump trial bid is shown with the sequence 1M-2M -3M. RE passes or bids 4M if she holds:

- 2TH in trump

- 1TH in trump and an Ace aside

- 1TH in trump and 4+ card trump support

- 2 Aces aside

- 1 ace aside and 4+ card trump support