Modern takeout doubles are geared towards being able to compete as frequently as possible - with the knowledge that letting the opponents play in a 2 level fit is typically a losing habit
It is fairly common these days to play, in most auctions, that we have two takeout doubles. For example.
Here we have doubled, the main message will be "takeout". We will never have 5 spades for this bid - if we had 5, we would just bid it.
The modern way to play is that the second double doesn't either guarantee 4 spades. We need to be flexible enough to use a double on such hands as this.
Here once again we are competing to either of our minors - we double for takeout. Partner needs to be on the same page, because if 2♠ is bid, we need to be able to correct to a minor, giving partner the picture that we have takeout for the minors. Give this auction to your partner for discussion - make sure you are on the same page
The most important signals
Double or bid?
Bid as high as possible!
Defending against a multi 2♦
Transfer or not?
Nv compete
How strong vulnerable?
Preempt suit quality
6322 and 7222
2♣ opening
Doubleton lead
Passive lead
When to lead active
1N with 5422
Takeout double
Negative double
Splinters
Competing partscore
Try not double
Ace Ace King
2 level overcall
Lead Trumps #1
Lead Trumps #2
7 card GOOD suit
To open or not, pre-empt or not
Let the opponents play when they are misfitting
The strongest hand
Be practical
Losing trick count bidding
Favourable vulnerability
Be a nuisance
Big trump fits
What does 3♥ show?
Mental game
6+ card suits
Use puppet stayman more
Don't push slam in competition
The unusual 2♠ bid
Intermediate jumps
Conventions
Choice of equal cards
Don't false card
Never preempt with 11 points
Is the bid forcing?
Double, Double
Double 1NT, next double
Counting Habit #1
Opener rebidding bad suits
Responder bidding bad suits
2♦ opening
Don't split honors