Lesson
Breaking the Single-Raise-Size Assumption Preflop
Preflop Architecture · advanced · 9 min
Tyler and Eric discuss using multiple preflop open and 3-bet sizes instead of a single standard size, and how that changes the ranges opponents must defend against. The lesson focuses on why copied GTO Wizard strategies can become inaccurate when your size-specific ranges differ from the sim your opponent is referencing.
Key takeaways
- There is no poker rule requiring one preflop raise size; one size is often used for convenience, not because it is always optimal.
- When you use multiple preflop sizes, each size has its own range, so opponents relying on a single-sizings solver output may misrange you.
- Giving a solver more size options can produce mixed strategies across many hands and can change which hands appear in each preflop range.
- Against a larger 3-bet size, hands that look like natural calls, such as low suited connectors or some offsuit broadways, may become folds.
- If opponents overcall preflop against the wrong size, their marginal hands can become losing calls because the in-position player can bet more often postflop.