What Is GTO?
Game Theory Optimal (GTO) play is a Nash-equilibrium strategy: if you execute it, an opponent cannot exploit you by changing their strategy. In theory you break even against another perfect GTO player (before rake). Real humans, including you, do not execute it perfectly, and rake is always taking a cut.
Balanced Ranges
The core of GTO is having a balanced range in every situation. This means your bets include both value hands and bluffs in mathematically correct proportions, making it impossible for opponents to exploit you.
Value vs. Bluff Ratio
With a pot-sized bet, GTO calls for roughly a 2:1 value-to-bluff ratio. This makes your opponent indifferent to calling — they break even whether they call or fold.
- Pot-sized bet: ~67% value, ~33% bluffs
- Half-pot bet: ~75% value, ~25% bluffs
- 2x pot bet: ~60% value, ~40% bluffs
Mixed Strategies
GTO often requires "mixing" — taking the same action with a hand some percentage of the time and a different action the rest. For example, checking a medium-strength hand 70% of the time and betting it 30%.
Minimum Defense Frequency (MDF)
MDF tells you how often you need to continue (call or raise) to prevent your opponent from profiting by bluffing with any two cards.
Examples:
Half-pot bet: MDF = 66.7% (defend 2/3 of your range)
Pot-sized bet: MDF = 50% (defend half your range)
2x pot bet: MDF = 33% (defend 1/3 of your range)
GTO vs. Exploitative Play
GTO
Unexploitable. Breaks even against perfect opponents. Best when you lack information.
Exploitative
Deviates from GTO to target opponents' leaks. Maximizes profit against weak players.
When to Exploit
- Opponent folds too much → bluff more than GTO suggests.
- Opponent calls too much → stop bluffing, value bet thinner.
- Opponent never raises → bet more liberally on every street.