I studied 1,755 flops. Here's when to check raise.
I analysed all 1,755 flop textures in a 30bb Big Blind versus Button spot to answer one question:
When should the Big Blind check-raise?
The difference between boards is enormous.
On 9-9-4, the Big Blind check-raises around 36% of the time.
On 10-3-2, it is around 26%.
But on A-K-7, it drops to just 6%.
So if your database says your check-raise frequency is too low, simply telling yourself to “raise more” is not much of a solution.
You need to know where those missing raises should come from.
A Low Frequency Is a Clue, Not the Leak
One of my students, Chris, was check-raising around 11% from the Big Blind, when we would generally expect something closer to 15–20%.
That tells us something is probably wrong.
But it does not tell us what.
Is he:
Calling strong hands that should raise?
Folding hands that make good bluffs?
Missing particular board textures?
Avoiding raises because he is uncomfortable playing the turn?
If he simply forces his frequency higher, he could easily start raising the wrong hands on the wrong boards.
So instead of asking:
How do I increase my check-raise frequency?
Ask:
Which check-raises am I currently missing?
That is a much more useful problem to solve.
Watch the full breakdown here:
Step 1: Find Where the Missing Raises Come From
Once we isolated Chris's database to Button versus Big Blind, heads-up, facing a small continuation bet, one category immediately stood out:
Paired boards.
Paired boards account for almost 17% of all flops, so they appear regularly.
They also generate a lot of check-raising.
Across all 1,755 flops in my report, the Big Blind check-raises around 18% on average.
On paired boards, that rises to approximately 27%.
Chris's frequency on these boards was significantly lower.
Now we had something actionable.
His problem was not simply “I need to check-raise more.”
A meaningful part of his missing aggression was concentrated on a specific, common type of flop.
Step 2: Understand Which Boards Want More Raising
Even within paired boards, the strategy varies dramatically.
On 9-9-4, the Big Blind raises around 36%.
On A-A-x boards, the average is closer to 4%.
Why?
On 9-9-4, the Big Blind has plenty of 9x and enough strong hands to support an aggressive raising range. Meanwhile, the Button is making a small continuation bet with plenty of weak hands that can be pressured.
On A-A-x, the Button's range connects much more strongly with the board, so the Big Blind gains less from aggressive raising.
This is why aggregate reports are so useful.
The goal is not to memorise:
9-9-4 = 36%.
Instead, ask:
How well does each range connect with this flop?
Who has more of the strongest hands?
Does the Big Blind have enough value to support bluffs?
Which weaker hands gain more from raising than calling?
Those questions create a framework you can actually use.
Step 3: Choose the Right Hands
A high-frequency check-raise board does not mean you should start raising everything.
Every hand still needs a reason to raise.
I find it useful to divide the range into four categories.
Value and protection
Trips are obvious raises, but some weaker made hands can raise too.
On 9-9-4, for example, 4x can get called by worse while also benefiting from protection against overcards and draws.
Bluffs
Good bluffs are not simply your weakest hands.
Look for hands with:
Equity when called
Useful blockers
Backdoor potential
Poor calling properties
These hands often gain more from generating folds immediately.
Calls
Some hands are comfortably strong enough to continue but do not gain much from raising.
Ace-high, for example, may have enough showdown value to call while keeping weaker bluffs in the pot.
Folds
Even on a board that check-raises 36%, plenty of hands still fold.
If a hand has little equity, poor blockers and few useful future cards, a high overall check-raise frequency does not magically make it a raise.
Step 4: Train the Spot
Understanding the strategy with a solver open is one thing.
Finding the raise with 15 seconds left on your time bank is another.
So train it.
Start with paired boards only and drill 25–100 decisions.
Before checking the answer, ask:
Is this a board where the Big Blind should raise frequently?
Then:
Does this specific hand have a reason to prefer raising over calling or folding?
When reviewing mistakes, do not just record the correct action.
Work out why you missed it.
Did you misunderstand the board?
Did you understand the board but choose the wrong hand?
Or did you know the raise was probably there but default to calling because it felt safer?
Each mistake tells you what to train next.
Don’t Chase the Statistic
When you return to the tables, your goal should not be:
I need to get my check-raise frequency from 11% to 18%.
That encourages you to manufacture aggression.
Instead, look for evidence that your decision-making is changing.
Did you recognise the high check-raise board?
Did you pause before automatically calling?
Did you consider whether your hand actually benefits from raising?
Your first sign of improvement may not be a higher check-raise percentage.
It may simply be recognising a raise that previously never entered your mind.
Recognition first. Better decisions next. The statistic follows.
Download the free aggregate report: I’ve made the complete 30bb Button versus Big Blind report available for free, covering all 1,755 flop textures. Start with one category—paired boards are a great choice—and use it to build a focused training drill. Download the report here.
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