This might help, website adress is www.chemistry.ohio-state.edu/~heng/personal/conv/c.ind..html This is a really good website for ALL conventions under the sun.However even better with over 350 conventions s this little beauty
http://home.nikocity.de/kwiese/konvent/allkonv.htmInverted Minors (a must with weak no trumps):
Standard: The raise from 1 to 2 of a minor shows 4+ support and 6-9 hcp.
The raise from 1 to 3 is "usually" used as a limit raise showing
5+ support and 10-12 hcp. (Stronger raises are made by bidding
another suit and then jumping later-- even bidding a 3 card suit
if strong enough.)
Inverted minors ideas: The auction 1C-p-2C-all pass is rare. Most
people will balance the 2C with a takeout double or a suit bid.
Also the double raise of a minor has always been troublesome. If
the 1-3 is limit then if partner continues bidding the partnership
may get too high, even at the four level. Say: 1C-p-3C-p; 3D-p-4C
and now you can no longer play at 3NT.
Inverted minors (denies a 4 card major):
1-3 raise: The 1 to 3 raise is used to show a weak hand with a bad
9 or less with 5+ card support. Opener only goes on with
a strong hand (17+).
1-2 raise: The 1 to 2 raise is unlimited in hcp. Responder has 4+
support in the suit--- the final contract may be in the
minor or in NT. The bottom of the 2 raise is generally
9 hcp, but could be a good 7 or 8 (good = 6+ support).
Opener must rebid (unless partner is a passed hand)
descriptively:
3minor: weak hand with the minor
2NT: balanced--- 15-17 if you're playing weak NT or
11-15 if you're not
3NT: balanced 18-20
new suit: non-minimum hand with a control in the suit
(this and partner's rebid should probably be
a controlled suit and not necessarily a first
round control)
4minor: strong hand with the minor---
it's probably better to play this as something
else such as _blackwood_
After opener makes their rebid, responder must also rebid
descriptively:
pass: only the 3minor rebid or the 11-15 balanced hand
3minor: minimum hand
2NT: showing a balanced hand
new suit: a control
4minor: strong unbalanced hand ---
probably better to play as _blackwood_
*NOTE: if either partner has made a non-minimum rebid, the
auction is GAME-FORCING (at least to 3NT)
1-4/5 raise: these are preemptive, if you had a strong hand you should
bid 2 of the minor
IN COMPETITION:
less than 2 of the minor competition:
if you can make 2 of the minor raise then inverted minors are still on.
1C-1H-2C this shows a strong hand
1C-1NT-3C showing a weak hand with clubs
1D-2C-5D preemptive
more than 2 of the minor competition:
the cue bid of their suit is strong
the 3 of the minor bid is about a limit raise
jumps in the minor are preemptive
1D-2S-3D about a limit raise with 5+ diamonds
1C-2D-4C preemptive
1D-2H-3H strong hand
more than 3 of the minor competition:
cue bid: very strong
4 of the minor: enough strength for the level
jumps in the minor: preemptive or to make
double: penalty or negative depending agreement
1C-3H-4C enough strength for the 4 level
1C-3S-4S damn strong, probably slam-searching
1D-4H-5D enough strength for the 5 level
1D-4C-5D preemptive or to make
1D-3H-dbl penalty or negative
