PDefense
Defending against a Precision Opening
8
   Your right hand opponent has just made a precision opening.
   The Precision openings to which defenses are handled in this
   flowchart are 1C, 2C, and 2D. 

   The conventional follow up bids by partner are also handled in
   this flowchart.


47
1
Partner conventional overcall?
4
Did your partner make a conventional bid that is part of the defense
to precision openings?
The conventional bids are a double of a 1C opener
and a 1NT overcall of a 1C opener.

1
RHO open 1C?
1
Check to see if your right hand opponent opened 1C

1
Conventional overcall ?
4
If you are playing a precision defense check for it now.
The default precision defense is very simple.
If you have both majors double.
If you have both minors bid 1NT.

1
Majors or minors?
2
With both majors double.
With both minors bid 1NT.

1
Long suit for preempt?
3
With a 6+ card suit and less than 9 points you should make a preemptive bid.
To preempt in clubs you probably need a 7 card suit because you have to go
to the 3 level.

1
6 card?
1
Is your long suit a 6 card suit?

1
Decent suit ?
2
Find your longest suit.  Check to make sure that you have a few honors in it.
Check the vulnerabilities as well to make sure you are not being too agressive.

1
Which suit ?
1
Bid your longest suit at the 2-level.

2
Bid according to
your Playing Tricks
8
The important thing to remember when making a shutout bid is that you must
try to avoid conceding a penalty worth more than the potential game for the
opponents if they decide to double you. This means that you can afford to
be set by two tricks with with unfavorable vulnerability, and three tricks
with equal or favorable vulnerability. Bid game maximum. So, for
instance, you need six Playing Tricks to open Three Hearts with equal
vulnerability. In case if you can open two in suit, you can assume
that your partner's hand will provide one trick, bid three.

1
Strong jump overcall ?
3
Are you playing Strong Jump Overcalls.  They do not make for a good
defense to a strong club opener, but if you are playing them and you have
a 6 card suit with 18 or more total points make a strong jump overcall.

1
Which suit ?
1
Jump bid in your longest suit.

1
Simple overcall ?
3
With 7 or more points and a decent 5 card suit you should make a simple
overcall of 1D, 1H, or 1S. To make a 2C overcall you should probably
have additional strength as it is at the 2 level.

1
Make bid
2
If suit is Diamonds, Hearts, or Spades, bid it at the one level.
If suit is clubs, check to make sure you have enough and then bid 2C.

1
Pass
2
You don't have a conventional overcall, you don't have a preemptive bid,
and you don't have a simple overcall.  You must pass.

1
RHO open 2C ?
1
Check to see if your right hand opponent opened 2C.

1
Michaels cue-bid ?
2
Are you playing Michaels cue-bid, with 5-11 High-Card Points and hearts
and spades ?

2
Can you
bid 2NT ?
3
Add 1 High-Card Point for Kx or Qxx in clubs.  Overcall 2NT with
(i) 16-18 High-Card Points ; (ii) Kx, Qxx, Jxxx, or better in clubs ;
(iii) no singletons or 6-card suits ; and (iv) at most four hearts or spades.

2
3-suited
hand ?
1
Do you have 3 or more cards in each unbid suit, and no 6-card suit ?

2
Take-out
double ?
10
Make a take-out double with:
(i) 10 or more High-Card Points outside your opponent's suit, and 4 or more
    cards in each unbid suit ; or
(ii) 12 or more High-Card Points outside your opponent's suit, and 4 or
     more cards in each unbid major ; or
(iii) 13 or more High-Card Points outside your opponent's suit, and no more
      than one unbid 3-card suit ; or
(iv) 16 or more High-Card Points
(You may count an Ace or a guarded King in your opponent's suit
as High-Card Points outside your opponent's suit)

2
5-card
suit ?
1
Do you have an unbid 5-card suit ?

2
Double
or pass
1
Double with 15 or more High Card Points, otherwise pass.

2
Strong
enough ?
5
You can overcall if you are within 2 Playing Tricks of your contract if
vulnerable, or 3 Playing Tricks if non-vulnerable. You can also overcall at
the 1-level if you have 11 High-Card Points, or 10 High-Card Points and a
6-card suit ; or at the 2-level with 14 High-Card Points and 5 cards to the
Queen or better, or 12 High-Card Points and a 6-card suit.

1
Strong hand ?
6
The precision 2D is a difficult bid to compete over.
Bidding 5 card suits will often lead to penalty doubles and if you bid NT,
they get the right lead every time. 
Diamonds are the only suit that it is safe to compete in.
With 16 or more points you should start with a double and see what partner
has to say.

1
Enough points to compete?
2
With under 10 points you will usually want to pass.
With 10+ you can try to compete.

1
Long major ?
2
Do you have a 6+ card heart or spade suit or a 5 card heart or spades suit
with at least 4 diamonds

1
Bid longest major
1
Overcall in your longer major.

1
Long diamonds ?
2
With 5 or more diamonds you can safely bid 3 diamonds.
Otherwise you should pass.

1
Long diamonds ?
4
If you have a weak hand but are long in diamonds you can still compete.
The bid of 3C after a 2D opener should be a weak hand with diamonds.
Opener always has at least 4 clubs, so it is unlikely that you would
want to compete in clubs naturally.

2
1C defense or
2D defense ?
1
Did your LHO open 1C or 2D?  What opening bid are we defending against?

1
Majors ?
1
Did partner show the majors or did he show the minors?

1
Better suit ?
3
Partner has now shown a 2 suited hand in the majors.
If you have significant length in one of partner's suits bid preemptively.
If your RHO passed, take a preference as cheaply as possible.

1
Better suit ?
3
Partner has now shown a 2 suited hand in the minors.
If you have significant length in one of partner's suits bid preemptively.
If your RHO passed, take a preference as cheaply as possible.

1
Partner doubled ?
1
Did partner double or did he bid 3C?

1
RHO interference ?
1
Did your RHO interfere after your partner's double?

1
9 or more HCP ?
2
Partner has shown a good hand.
With 8 or more HCP you want to try to go to game.

1
Longest suit ?
3
With a 5 card or longer major bid it.
If your longest suit is diamonds, then double.
If you are balanced and have a stopper in the suit they just bid, bid NT.

1
Long diamonds ?
2
You have a weak hand. If you have long diamonds you can bid them freely.
Otherwise it is best to pass.

1
9 or more HCP ?
1
With 9 or more HCP you want to game force.

1
Longest suit ?
3
Do so by making a jump bid in the majors, 
by bidding 3D if diamonds is your longest suit, or 
by bidding 3C if clubs is your longest suit.

1
Long suit ?
4
If you have 5 or more diamonds pass.
If you have a 5 card major suit, bid it.
If you have 4 diamonds pass.
If you have 3 or fewer diamonds, bid 2NT.

1
Good hand ?
2
If you have 15+ total points it may be worth looking further.
Otherwise you should complete the transfer to 3D.

1
Long in diamonds ?
3
If you are long in diamonds you can either jump to 5D or bid 4D invitationally.
If you are not long in diamonds you can bid a new suit naturally looking
for 3NT or pass with a minimum.

1
Interference ?
2
If there was interference and you aren't long in diamonds pass.
If no interference bid 3D.

1
3$C
0

1
2NT
0

1
Double
0

1
Double
0

47
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1
0 34 37 2 3 -2 -4
