3 Suited Hands

     

In this discussion we are principally concerned with 2 distributions:

4441 & 5440 

These distributions are the bane of ACOL & SAYC because they do not sit easily into the regular provided bidding methods. They cause 'lies' to be made (or distortions in the projected distribution if you prefer). Some ACOL tournament players do utilise the third arm of 2 Multi: to show a 3-suited hands BUT BETA uses 2D  3rd 'leg' to show some 5-5 hands: H&C &  S&D.

3-suited hands do not fit comfortably as in reality, they are truly in a class of their own, neither balanced or unbalanced: as BETA

Indeed they can equally well end up playing in NT's or suit contracts  and so this duality is not so easily explored.

These exceptional hands with double fits and the shortage is useful can even produce slams - so again good explorative sequences are required.

Beta's Openings with 3-suited hands:
With a 5 card Major or Diamonds bid it!
With 4-4 in the majors bid 1  - rebid in your minor with a 44{41} hand
With a 4 card Major and a Major doubleton shortage prefer a 1N opening when the rules are satisfied - elso open 1C
 
On your 1N rebid 12-16 partner inquires with 2 if 9+ HCP: one has an undisclosed heart or spade suit you can now bid it safely. E.g. 1-1S-1N-2-2Ma or  1-1(spades)-1N-2-2 BUT in the former case partner may he may again rebid his 6 card Major and have to play with a 6-1 fit ...
Or finally partner leaves you in a 1NT aware that your hand has no 'S' or 'V'.
Many argue its not worth the bother as their overall frequency of occurrence is just 2.993% & 1.243% respectively - a total of only 4.24% rounded - we beg to differ!
      Partner may have 4 's and you end up in a 2 possibly even in a fit!  
Despite all the foregoing gloom 3 suiters have a spectacular probability of producing a 4-4 fit or even a double fit! Probabilities:

4441:
Single fit: 80.3%
Double fit: 18.5%

5440:
Single fit: 88.3%
Double fit: 18%

If opponents open in our shortage our Multi 1NT o'call can be used to show the remaining 3 suits but only if 16+HCP - shown with a 2N rebid - then partner can choose any of the 3 suits to play in or even in NT's.  However we have no special sequences set aside for opening on a 4441 hands due to their low frequency of occurence.
Saying that BETA's  style of  Protection bidding provides choices with 1N, *, 2suit  to give an excellent description.

Happily we can say that 3-suited hands cause BETA less problems than confusion found in ACOL or 5 card Major systems.