- natural, 5 card majors (in 1st/2nd)
- variable notrump - 12-14 / 15-17 depending on position and vulnerability
- 1♣ and 1♦ opening may be with 3 cards
- 2♦ the only strong opening (GF)
- 2♣ opening - artificial, weak with both majors (54/45/55/64/46)
Bridge bidding system noted for Kocolino - Vang.
Notations:
we play variable notrump: 12-14 HCP in most positions, EXCEPT 3rd position in red and EXCEPT 4th position (when is 15-17).
1H - 1S - 1NT is always 12-14
with 33/43/34/44 minor, we may choose which minor to open, we have no strict rules.
answers to 1m
subsequent actions
we play double checkback ( even by passed hand?)
a non-jump reverse by opener is forcing for one round (for example, 1C - 1S - 2H). then
1m - 1M - 2NT. this 2NT is alertable, we include here hands like
thus, 3C is a special relay for clarification:
other than this 3C relay, the responder may bid
usually 5 card (very rare, for tactical reasons, may be 4 card in 3rd position).
1NT forcing, pretty standard 2/1 style.
2NT is fit4, at least INV. natural developments.
reverse drury-fit by passed hand.
12-14 or 15-17. we play the same system in both cases. it may have 5 card major, but we have no mechanism to detect this.
1NT
weak major 2 suiter. 3-10 HCP. may be 5-5 or 5-4/6-4 either way.
In competition, after 2C - (DBL) - pas is to play in clubs, 2D is to play in diamonds, redouble ask for longer major.
this is the only strong opening, it is GF.
answers:
those are normal weak two openings. may be with only 5 card if the hand is in range 8-11 HCP and the suit is good (2 big honors). modified 2NT ogust:
20-22 BAL. may have 5 card major, but we have no way to detect this (NO puppet stayman)
opening higher than 3C (including) are natural preempts.
3NT is gambling with nothing outside the solid minor (at most a queen).
in 3rd position (after pass-pass), our preempts can vary from very weak to full opening (tactical).
after our suit overcalls, we play rubens advances. everything starting from cuebid in opp suit (included) to direct fit in partner suit (excluded) is TRANSFER.
rubens advances does NOT APPLY when
Examples: