Chapter 3: C-bet

A C-bet Has Only Three Purposes

“Bet because it is strong” is not a reason

① Value

Get calls from hands weaker than yours. It only works once you can picture your opponent’s calling range.

② Fold equity

Make hands stronger than yours fold. Its value depends on how many folding hands your opponent’s range holds.

③ Denying equity

Do not show your opponent’s draws a card for free. A purpose that only arises on boards with many draws.

When you should check

• When none of the three applies. Betting with an in-between hand loses the most
• A bet whose purpose you cannot state ends up leaving only your opponent’s strong hands

What Each Size Means

Size is decided not by “how much you want to win” but by “which range you bet with”

Size	Equity your opponent needs	When to use it
25%	16.7%	Dry boards with a big range advantage. Push with the whole range
33%	19.9%	The most versatile. The standard size for pushing cheaply and widely
50%	25.0%	Middle boards with draws
75%	30.0%	You have nut advantage and want to make draws fold
100%	33.3%	Polarized. Only strong hands and bluffs
150%	37.5%	Overbet. Only when nut advantage is extreme

“The equity your opponent needs” is settled by calculation. For a bet s (as a share of the pot), it is s ÷ (1 + 2s). Do not memorize this number; learn to work it out on the spot.

Choosing a size is not memorization; it is working backward from range advantage and nut advantage.

Conditions for Betting Small / Betting Big

This is where decisions split

Small sizes (25–33%)

• Range advantage is large (A-high dry)
• The opponent has almost no strong hands
• You want to bet with your whole range
• You want to set up bluffs cheaply

Side effects of small sizes

• They cannot make the opponent fold (the opponent only needs 16.7%)
• They show draws a card cheaply

Big sizes (75–150%)

• You clearly have nut advantage
• Making draws fold is worth a lot
• You want to polarize your range
• The opponent’s range is nothing but in-between hands

Side effects of big sizes

• Bluffs cost more (you need to keep the ratio)
• Your hands get narrowed down (you become easier to read)

Using one size for one spot is actually recommended at first. Using both can wait until you can explain the reasons for each.

How to Sort Your Hands

Even on the same board, the roles split into five

Value bet	Hands that beat your opponent’s calling range
Bluff bet	Hands with no showdown value that have room to improve
Check-call	Weak hands that can beat your opponent’s bluffs
Check-raise	Strong hands, or draws with equity
Check-fold	Hands with neither a chance to win nor room to improve

The principles of sorting

• Put middle hands (weak top pair, middle pair) into checks
• Choose bluffs from “hands that are behind now but win if they hit”
• Do not bluff with hands that have showdown value

How to Build a Check-Raise

It looks passive, but it is the most aggressive option

Conditions for using it

• You are OOP (the side that acts first)
• The opponent C-bets at a high frequency
• The board favors your range (low connected)

Hands to use for value

• Sets, two pair, strong top pair
• Only hands that beat the opponent’s calling range

Hands to use as bluffs

• Flush draws, open-ended straight draws
• Hands with backdoors (equity remains)
• Do not use hands with absolutely nothing

The ratio (estimate)

• Value : bluff = start from around 1 : 1
• If the opponent folds too much, add bluffs
• But it is an estimate. It moves with the board

The biggest reason a check-raise works is that the higher an opponent’s C-bet frequency, the more weak hands their range contains. If your opponent’s C-bet frequency is over 70%, the check-raise becomes the adjustment with the highest profit rate.

C-bet Frequency Estimates

These are estimates. Exact values need solver verification

Board	Frequency (estimate)	Size (estimate)
A-high dry	70 – 90%	25 – 33%
K/Q-high dry	60 – 80%	33%
Two-tone middle	50 – 70%	33 – 50%
Paired board	60 – 80%	25 – 33%
Monotone	30 – 50%	33%
Low connected	25 – 45%	Smaller, or bigger and narrowed

Remember the order more than the numbers themselves. High on dry boards, low on connected ones. This order can be derived by reasoning. The percentages move with the environment.

JudgmentJudge this by the situation. If your opponent folds too much or too little, you may move away from this table.

Common C-bet Mistakes

The cause is a missing reason more than a frequency problem

The same frequency on every board	Range advantage changes from board to board
Bet big because you have the advantage	Range advantage decides frequency; nut advantage decides size
Betting with an in-between hand	The worst shape: weak hands fold and only strong hands stay
Bluffing with a hand that has showdown value	You are throwing away a hand that can win
Betting without a plan for the turn	You get stuck on the turn and end up folding

Checking is not losing. Being able to check when you have no reason to bet is the first step to getting better.