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Trial Bids
Trial Bids after Major Suit Agreement
Responder has directly raised opener’s major suit to the two level and opener, with better than minimum values, introduces a new suit (or bids 2NT) as a try for game.

This new denomination by opener is called a trial bid, the following prevail:
1.    A new suit by opener is 100% forcing.
2.    The suit will contain at least 3 cards, usually headed by one top honour.
3.    Opener will have a poor 5 to a good 7 loser hand. (Generally with a minimum high card
holding opener needs a 5 loser hand, with medium high card values he needs 6 losers,
occasionally 5. With 18 points and 5 losers or 19 points opener should insist on being in
game.)

The purpose of the trial bid is to make responder re-evaluate his hand. Having done so responder will sign-off in 3 of the major, make a return trial bid or bid game.

The criteria that responder uses to assess the possibility of game are:
1.    The hand is minimum — return to 3 of the major
2.    The hand is maximum — jump to 4 of the major
3.    If it is difficult to judge (7-8pts) then examine your holding in the trial bid suit:
With a top honour (A,K or Q) or a singleton and 4 trumps — bid game.
With a small doubleton — usually right to sign-off at the 3 level.
With 3 or 4 small cards — sign-of in 3.


The trial bid attempts to overcome one of the weaknesses of the Losing Trick Count by allowing the partnership to assess “the degree of fit”
e.g.    AKJ10x    1S  - 2S    (i) Qxxx    Bid 3S     (ii) Qxxx    Bid 4S
           x              3D - ?           QJx                           xxx
           Kxx                               xxx                           QJx
           Axx                               Kxx                          Kxx

While the two responding hands have the same high cards and shape it is obvious that hand (i) is unlikely to make game while hand (ii) would be most unlucky to fail. The difference is the good fit in diamonds.

There are a few special circumstances:

1.    Opener Rebids 2NT
This shows 17-18 points in a balanced hand, often with only 4 cards in the major. Responder re-evaluates on the basis of this information, mostly by simple arithmetic. This is the one trial bid that responder can pass, if appropriate; otherwise he bids the agreed major at the 3 or 4 level or 3NT

2.    Opener Rebids in the Other Major.
While these trial bids may be based on 3 card suits it is not impossible that a second major suit fit exists. This second 8 card fit is frequently a 4-4 one and it will often play better than the 5-3 or 5-4 fit. If responder (a) does have 4 card support and (b) is going to accept the invitation to game, then a raise of the second major is in order. Opener will then place the contract in the correct denomination, depending on the length of his trial bid suit.
If responder is not interested in game then he must return to 3 of opener’s original suit, even when holding 4 cards in the trial bid suit.

3.    The Return Trial Bid,
If responder is unsure of the value of his hand he may bid a suit (below 3 of the agreed major) to enable opener to judge the degree of fit — this is otherwise known as ‘passing the buck’
    e.g.    lH — 2H    x     Bid 3D.     With 3 small in opener’s trial bid suit and
                     3C — ?    Jl0xx            minimum values it is usually right to signoff
                                  AJxxx            in 3H. But the hand is not without merit and a xxx            try is in order - a return trial bid.

    With  (i)  xxx        Opener would be delighted to bid the 22 pt game.
                 AKQxx    
                 Kx    
                 Axx    

    With (ii) Kx        opener would settle for 3H.
                 AKQxx
                 xxx
                Axx

What, if any, trial bid do you make with the following hands?

    1S – 2S
     ?

1.    KQ109x    2.     AQ9xx    3.    KQ109x    4.    AQJ10x
       Ax                     Qx                  A                      QJxx
       Axx                   Axx                 xx                     Ax
       KQx                  Kxx               Kxxxx                xx
                            
       3D                     Pass              3C                     3H
                           
5.    AQ9xx    6.    AQ9x    7.    KQJx    8.    AQ9xx
       Kx                 Axx               Q10x           Qx
       Axx               Axx                KJx             Axx
       KQx              KQx              AQx            KQx
                           
     3D/4S           3NT/4S           2NT             3D

How do you respond to opener’s trial bid with the following hands?

1.    1S    2S    (a)    J10xx    (b)    Q10xx    (c)    109xx
       3C    ?              Axx                xxx                 Kx
                               KJ10x            KJ10x            AJxx
                               xx                   xx                   xxx
                               
                               4S                  3S                  3D (return trial bid)

2.    1H    2H    (a)    109x    (b)    Ax    (c)    K109x
       2S    ?                Q10xx         Jxxx           QJxx
                                 Qxx             Qxx           Qxx
                                 AJx             xxxx           xx
                               
                                4H                 3H            3S (4 cards and accepting)

3.    1H    2H    (a)    Kx    (b)    QJx    (c)    xx    (d)    Kxx
       2NT                  109xx        109xx        Q10xx       Kxxx
                                Jxx             K10x         Jxxx          QJ
                                A10xx        QJxx         Kxx           xxxx
 
                                4H              3NT         3H             4H


4.    1S    2S    (a)    Qxxx    (b)    Qxxx    (c)    Kxxx
       3H    ?               xxxx             KQx             Q10xx
                                KJ                xxx                 xx
                                xxx               xxx                 Kxx

                                3S                 4S                 4H (4 cards and accepting)


So what does a re-raise mean?
Partner raises your major to the two level and you now bid three of the same suit.
Since the re-raise is not required as a game try, it can be used as a pre-emptive manoeuvre.
e.g.     Q
          AKJxxx
          Qxxx
           Jx
            1H – P – 2H – P
            ?
The opponents can make at least 2S or 3C and might even have game on. They have not found a way into the auction so far and our re-raise to 3H will make it even more difficult for them to compete with any assurance of safety. Balancing over 2H is much easier.
       
Points to Emphasise

Trial bids are used to assess the degree of fit when hands are close to having game values.
The losing trick count is not so good in this area so trial bids are a useful adjunct in the hand evaluation process.