what's rebid 1S?

[lycier]

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my questions are at below:

 

1- after 1♥,what;s the meanings of 1♠?

Robot play cheapest 1♠,I think it shows 4♠+4♦ plus with unbelanced hand.if with belanced hand,Robot should rebid instead of 1♠,right?

I have to say the balance is key,also is bidding rule.

 

2- As to this hand,reponder should play wjs,to bid 2♥ should be a reasonable auction,why respond 1♥?

[georgi]

1) GIB will rebid with 1♠ with any hand not good enough to rebid 2♠ ( strong with 5+♦ and 4+♠) or 2NT.

 

So unless most unpleasant hand 4144, that is likely limited to 14HCP, with 4144 that could be a stronger hand as cannot jump at that point.

 

GIB will not skip 1♠ with 4(23)4(23) hand to bid 1NT ( at least at the moment is like that ).

 

2) GIB plays Soloway jump shifts from none-passed hand which is 17+TP and 5+ in that major

or if hand is passed, 2♥ here would be Support jump shift by passed hand -- 4+ ♦; 11- HCP; rebiddable ♥; 11-12 total points

 

so with weak hand with major, GIB will bid first 1M, then might rebid 2M depend on rebid by opener. Might pass rebid as well depend on it.