Lesson 37 [Intermediate] Multi-Sizing Strategy

In the same situation, mixing various bet sizes makes it difficult for your opponent to read your hand. You must mix value and bluff into all sizes to prevent exploits.

Basic Strategy

Use multiple sizes (1/3 pot, 2/3 pot, overbet) on the same board, and mix value and bluff into each size.

Basic Premise: 100BB cash game, 6-max, heads-up pot

There are three key aspects of multi-sizing:

• Small size (1/3 pot): Weak value, some bluffs (frequently used)
• Medium size (2/3 pot): Medium value, some bluffs (usually)
• Large size (overbet): Nut value, polarized bluffs (occasionally)

There are three reasons why multi-sizing is important:

• If you only use one size, your opponent will read your patterns and exploit you.
• Changing sizes based on hand strength will unbalance your range.
• Mixing value and bluff into all sizes makes it difficult for your opponent to respond.

Practical Application

1. When you have a significant range advantage on the flop

Primarily use 1/3 pot, but also mix in 2/3 pot. Bet a wide range with small sizes, and polarize nuts and bluffs with large sizes.

2. When the river is a polarized situation

Use 2/3 pot and overbet. Mix nut value and bluffs in equal proportions to force difficult decisions on your opponent.

3. When your opponent reacts differently to each size

Adjust by exploiting. For example, if your opponent folds a lot to small sizes, increase your bluffing frequency. If they only call large sizes, increase the frequency of small sizes.

4. When the board changes on the turn

Readjust according to the turn board, regardless of the flop size. Even if you bet small on the flop, you can bet large on the turn if a dangerous card appears.

Thought Framework

When deciding on multi-sizing, it's good to approach it with this framework:

1. Which sizes will you use? (Choose from 1/3 pot, 2/3 pot, overbet)
2. Which hands will you put into each size? (Value vs. bluff ratio)
3. What is your primary size? (The size you will use most frequently)
4. How does your opponent react to each size? (Difference in fold frequency)
5. Is your range balanced? (Value and bluff in all sizes)

Example Hand Analysis

Example 1: Using two sizes on the flop

Game: Cash game 1/2, Stack 200BB
Position: BTN
Preflop: Hero raises $6 from BTN, BB calls
Pot: $13
Flop: K♠ 8♣ 3♦
BB: check
Hero's Range: KK (set), K9s (top pair), A5s (air)

Thought Process:

1. Who has a structural advantage on this board?
   → Dry board, so my range has a significant advantage. Can use multiple sizes.
2. What role does my hand play within my range?
   → Decide which size to bet for each hand.
3. Does my opponent have enough hands to fold / do they call a lot?
   → Must mix value and bluff for each size to maintain balance.

Conclusion:

• 1/3 pot ($4): K9s (weak value), some A5s (bluff) – 70% frequency
• 2/3 pot ($9): KK (nut value), some A5s (bluff) – 30% frequency

Comment: The primary strategy is to bet a wide range with 1/3 pot, and mix nuts and bluffs with 2/3 pot. This prevents your opponent from thinking “small size = always weak” or “large size = always strong.” All sizes must contain both value and bluff.

Example 2: River Polarized Multi-Sizing

Game: Cash game 1/2, Stack 200BB
Position: BTN
Preflop: Hero raises $6 from BTN, BB calls
Pot: $13
Flop: Q♠ 9♦ 6♣, BB checks, Hero bets $4, BB calls
Pot: $21
Turn: 2♥, BB checks, Hero checks
Pot: $21
River: 3♠
BB: checks
Hero's Range: QQ (set), A8s (air)

Thought Process:

1. Who has a structural advantage on this board?
   → Polarized situation on the river. Consists of nut value and bluffs.
2. What role does my hand play within my range?
   → QQ is nut-level value, A8s is a bluff.
3. Does my opponent have enough hands to fold / do they call a lot?
   → Must mix value and bluff with large sizes.

Conclusion:

• 2/3 pot ($14): QQ 70%, A8s 30% – Maintain value to bluff ratio
• Overbet ($30+): Some QQ, some A8s – Maximize polarization

Comment: In polarized river situations, use large sizes. You must mix value and bluff into both 2/3 pot and overbet to prevent your opponent from exploiting you. If you always overbet QQ, your opponent will read your patterns.

Example 3: Exploit – Opponent folds frequently to small sizes

Game: Cash game 1/2, Stack 200BB
Position: BTN
Observation: Opponent folded 80% to 1/3 pot bets and 50% to 2/3 pot bets in the last 20 hands.
Preflop: Hero raises $6 from BTN with A♣9♣, BB calls
Pot: $13
Flop: K♦ 7♠ 4♥
BB: checks

Thought Process:

1. Who has a structural advantage on this board?
   → A9 is weak with ace-high, but the opponent folds too much to small sizes.
2. What role does my hand play within my range?
   → It's a bluff hand, but an exploit opportunity.
3. Does my opponent have enough hands to fold / do they call a lot?
   → Folding 80% to 1/3 pot makes bluffing highly profitable.

Conclusion: Bet $4 (1/3 pot) – Increase bluff frequency

Comment: If your opponent folds excessively to small sizes, increase the frequency of using 1/3 pot and raise your bluffing percentage. Exploit your opponent's excessive folds. However, if your opponent adjusts, you must return to a balanced strategy.

Example 4: Changing size on the turn

Game: Cash game 1/2, Stack 200BB
Position: BTN
Preflop: Hero raises $6 from BTN with A♠A♣, BB calls
Pot: $13
Flop: 9♦ 6♣ 3♠, BB checks, Hero bets $4 (1/3 pot), BB calls
Pot: $21
Turn: J♠ (flush draw added)
BB: checks

Thought Process:

1. Who has a structural advantage on this board?
   → J♠ on the turn adds a flush draw. AA is still strong but needs protection.
2. What role does my hand play within my range?
   → It's an overpair for value, but the board has become dangerous.
3. Does my opponent have enough hands to fold / do they call a lot?
   → Bet small on the flop, but protect with a large size on the turn.

Conclusion: Bet $14 (2/3 pot) – Adjust regardless of flop size

Comment: Just because you bet small on the flop doesn't mean you need to bet small on the turn. The board has changed, so readjust your size. Since a flush draw was added on the turn, it's advantageous to protect with a large size. Apply multi-sizing flexibly.

Key Pattern Summary

Pattern 1: Mix value and bluff into all sizes (maintain balance)

Pattern 2: Combine primary size (70%) + secondary size (30%)

Pattern 3: Flop → 1/3 pot primary, 2/3 pot secondary

Pattern 4: River polarized → Use 2/3 pot, overbet

Pattern 5: Weak value → Small size, nut value → Large size (but mix)

Pattern 6: Opponent reacts differently to each size → Adjust by exploiting

Pattern 7: Board change on turn/river → Readjust size (regardless of flop)

Pattern 8: Using only one size → Opponent can exploit

Quiz

Question 1
On a K♠ 7♣ 2♦ flop, you hold AK (top pair, top kicker). From a multi-sizing perspective, what is the correct strategy?

A) Always 1/3 pot (weak value small)
B) Always 2/3 pot (strong value large)
C) 1/3 pot 70%, 2/3 pot 30% (mix)
D) Check (trap)

Question 2
On a Q♠ 9♦ 6♣ flop, you hold A5s (air). What is the multi-sizing bluff strategy?

A) Always 1/3 pot (bluff small)
B) Always 2/3 pot (bluff large)
C) Mix bluffs into all sizes
D) Check (no bluff)

Question 3
Your opponent folded 85% to 1/3 pot bets in the last 30 hands. What is the correct exploit strategy?

A) Increase 1/3 pot frequency and bluffing percentage
B) Only bet 2/3 pot
C) Stop using 1/3 pot
D) No change

Question 4
You bet 1/3 pot on the flop and your opponent called. A dangerous card (flush draw added) appeared on the turn. What is the correct strategy?

A) Maintain 1/3 pot (consistency)
B) Increase to 2/3 pot (respond to board change)
C) Check (pot control)
D) Fold

Question 5
You completed a nut flush on the river. From a multi-sizing perspective, what is the correct strategy?

A) Always overbet (nuts large)
B) Always 1/3 pot (nuts small)
C) Mix 2/3 pot and overbet, and mix bluffs into the same sizes
D) Check (trap)

Answers and Explanations

Question Answer Explanation Question 1 C) 1/3 pot 70%, 2/3 pot 30% AK is strong value, but if you always use the same size, your opponent will read your patterns. Make 1/3 pot your primary, but also mix in 2/3 pot to maintain balance. This prevents your opponent from simplifying “large size = strong hand.” Question 2 C) Mix bluffs into all sizes Bluffs must also be mixed into all sizes to maintain balance. If you only bluff 1/3 pot, your opponent will exploit you by thinking “small size is weak.” If you only bluff 2/3 pot, the bluffing cost is too high. Distribute bluffs just as you distribute value. Question 3 A) Increase 1/3 pot frequency and bluffing percentage If your opponent folds 85% to 1/3 pot, it's an exploit opportunity. Increase the frequency of using 1/3 pot and raise your bluffing percentage to exploit your opponent's excessive folds. However, if your opponent adjusts, you must return to a balanced strategy. Question 4 B) Increase to 2/3 pot Just because you bet small on the flop doesn't mean you need to bet small on the turn. The board has changed, so readjust your size. Since a dangerous card appeared on the turn, it's advantageous to protect with a large size. Apply multi-sizing flexibly. Question 5 C) Mix 2/3 pot and overbet, and mix bluffs into the same sizes Even when you complete the nuts, multi-sizing and balance are important. You must mix 2/3 pot and overbet, and mix bluffs into each size in the same proportion to prevent your opponent from exploiting you. If you always overbet the nuts, your opponent will easily fold.