In my natural system documented at
http://bridge.wikia..../natural_system
My system is based on 15-17 NT and 4-way transfers, however, the following auctions are modified to a 12-14 NT and 3-way transfers to match the top post:
MODIFIED ON 23RD JUNE: DUMP BLACKWOOD AND USE 4NT AS TRUMP CUE
MOST OF THE FOLLOWINGS WON'T WORK IF VOIDWOOD IS IN USE!
Hand 1 - Dealer is South
1NT (12-14)
- 3
♠ (5-5 minors short in spades, GF)
4
♦ (agreeing the trump suit, responder with 17 HCPs + 3 DPs can now start cuebidding)
- 4NT (trump A cue, denies hearts and spades 1st round controls)
5
♦ (I worry about the clubs)
Due to the lack of bidding space, South cannot tell North about his hearts and spades, and North cannot tell South about his clubs, therefore, slam cannot be bid safely (However, it may worth the risk continue cuebidding the slam hoping the opponents cannot cash the
♣AK since we have more than 33 points in total)
Hand 2 - Dealer is North
1
♦
- 1
♥
3
♦ (suggests 6 of the suit, 19+, GF)
- 4
♥ (advance cue-bid)
4
♠
- 5
♣ (denies diamond ace)
5
♥ (second round control)
- 6
♣
7
♦ (everything is here!)
Hand 3 - Dealer is South
1
♣
- 1
♠
2
♥ (a reverse!, suggests 5 clubs and 4 hearts)
- 3
♦ (4SF, to game)
3
♥ (suggests 6 clubs and 5 hearts, can't play 3NT due to lack of diamond stopper)
- 4
♠ (advance cuebid)
5
♣ (cuebid, denies hearts A)
- 5
♥ (I worry about the diamonds, so let's sign off)
South cannot continue bidding since he cannot know the trump A and K, a diamond trick and a heart trick can easily get lost.