Bet Sizing Links Flop and Turn

Streets · updated 2026-03-08

1. General Principles of Bet Sizing

Bet sizing is the ratio of the bet size to the pot (bet/pot).

It is not chosen randomly. It is based on several factors:

2. Large Equity Advantage and Small Bets

One of the most counterintuitive points in GTO logic.

Why, with a large equity advantage, the bet is usually smaller, not larger.

Example:

BTN opens, BB calls. Flop: As 7d 2c.

BTN has many Ax hands (top pair), so BTN has a large range advantage.

What the solver does in such spots:

It bets frequently, but small: 25-33% pot.

Why:

• There is no need to protect the hand; it is already strong.
• The opponent cannot apply pressure because their range is weaker.

In theory:

• The larger the advantage, the more often and smaller we bet.
• The closer the ranges, the less often and larger we bet.

Why betting large with dominance is unprofitable:

• We fold out weaker hands that are already behind, losing value.
• We overinvest and do not gain equivalent EV from bluffs.

When sizing increases:

When the advantage is small or the board is coordinated (T98ss, J76r):

• The opponent has many draws.
• Equity is distributed more evenly.
• We need to protect equity and deny part of the range, so the bet is larger (50-100%).

Exceptions and nuances:

• Nuts and near-nuts can sometimes bet large even with an advantage to extract value and polarize.
• If the goal is equity denial, large sizes are possible even with an advantage.

3. Common Flop Bet Sizings

Typical bet sizes on the flop in modern GTO strategies:

Solver frequency trend on the flop:

• In position: about 60% of bets are 25-33% pot.
• Polar boards (A-high dry): small bets.
• Middle and low boards with flush or straight draws: large bets or checks.

4. Common Turn Bet Sizings

On the turn, ranges are more condensed and bet sizes increase.

Solver frequency trend on the turn:

• Medium sizing (50-75%): about 60-70% of spots.
• Overbets (100-150%): about 20-30% when the board changes strongly.
• Small bets are rare; ranges are already filtered.

5. Relationship Between Flop and Turn Sizings

6. Example Dependencies IP vs BB

BTN vs BB, flop Ks 7d 2c:

• BTN has a large advantage: bet 25-33%.
• Turn 9c, still dry: bet 50-66%.

BTN vs BB, flop Ts 9s 6d:

• Ranges are close, draw-heavy board: bet 66-75%.
• Turn 2c (blank): bet 75-100%.
• Turn Qs (card improving BTN): possible overbet 125%.

7. Turn Card Scenarios and Sizings

7.1 Paired Third Pair

Example: flop Kd 9c 4s, turn 4d.

Effect:

• The board becomes less dynamic.
• BB has few full houses.
• IP equity advantage increases.

Typical sizing:

• Small: 33-50% pot.

Reason:

• The board is static.
• We extract value from Kx and protect with frequent bets.

Result:

• Sizing: 33-50% pot.
• Frequent range betting.

7.2 Paired Second Pair

Example: flop Kd 9c 4s, turn 9d.

Effect:

• The paired card is strong for BB (9x).
• IP also has strong hands (K9s, full houses).
• Ranges are closer.

Typical sizing:

• Large: 66-100% pot.

Reason:

• Polarized play with strong value and bluffs.

Result:

• Sizing: 66-100% pot.
• Polar range, lower frequency.

7.3 Paired Top Pair

Example: flop Kd 9c 4s, turn Kc.

Effect:

• Large range shift.
• Maximum equity dominance for IP.

Typical sizing:

• Small: 25-50% pot.

Reason:

• Board is capped in our favor.
• We bet often, without needing protection.

Result:

• Sizing: 25-50% pot.
• Frequent cheap value bets.

7.4 Straight Completes

Example: flop Td 9c 4s, turn 8c.

Effect:

• Board becomes dangerous.
• Both ranges can have straights, IP more often.

Typical sizing:

• Large: 75-125% pot.

Reason:

• Polarization with value (straights, sets) and strong bluffs.

Result:

• Sizing: 75-125% pot.
• Pressure on BB defense range.

7.5 Flush Completes

Example: flop Kd 9d 4s, turn 2d.

Effect:

• Advantage for the player with more flushes, usually IP.
• BB still has some weaker flushes.

Typical sizing:

• Large: 66-125% pot.

Reason:

• Strong polarization: flushes vs bluffs.

Result:

• Sizing: 66-125% pot.
• Solvers prefer large bets or checks.

7.6 Overcard Appears

Example: flop 9c 6s 2d, turn Qh.

Effect:

• Card strengthens the preflop raiser.
• Range advantage increases.

Typical sizing:

• Medium: 50-75% pot.

Reason:

• Apply pressure to middle pairs without full polarization.

Result:

• Sizing: 50-75% pot.
• Value and semi-bluffs.

7.7 Undercard Appears

Example: flop Kd 9c 4s, turn 2c.

Effect:

• No meaningful change.
• IP keeps range advantage.

Typical sizing:

• Medium: 50-66% pot.

Reason:

• Continue pressure and deny equity.
• Small bets do not apply enough pressure.

Result:

• Sizing: 50-66% pot.
• Range or polar betting depending on flop.

8. Summary Table