SB 25bb Push Fold

Overview

SB 25bb Push Fold refers to a simplified preflop strategy used by the small blind (SB) when the effective stack is 25 big blinds (bb) in a heads-up or multiway pot (typically when the action folds to the SB). At this stack depth, the SB's decision to open-raise or limp becomes suboptimal because of the high risk of being 3-bet or shoved on, making a pure push/fold approach mathematically sound in many game theory optimal (GTO) frameworks.

Why 25bb?

25bb is a critical stack depth where the SB's range must be tight enough to avoid being exploited by the big blind (BB) but wide enough to capitalize on fold equity. Push/fold charts are commonly solved for stack sizes from 10bb to 30bb, with 25bb being a typical transition point where calling ranges and post-flop play become less relevant due to the high commitment of chips.

Typical Ranges

In a heads-up scenario with both players playing optimally, the SB's push range at 25bb includes hands like:

• Premium hands: AA, KK, QQ, AK (always shove)
• Strong broadways: AQ, AJ, KQ (shove or consider mixed strategy)
• Suited connectors: 87s, 98s (sometimes shove, sometimes fold)
• Low pocket pairs: 22-66 (shove depending on opponent's calling tendencies)

The exact range depends on the BB's calling range, which in GTO typically calls with about 20-25% of hands at this depth, including strong aces, high pocket pairs, and some suited connectors.

Adjustments and Considerations

• Opponent tendencies: Against a tight BB, the SB can shove wider; against a loose caller, tighten the range.
• Tournament ICM: In tournaments with pay jumps, the push/fold decision becomes more conservative, especially near the bubble or final table.
• Multiway pots: If there are other players yet to act (e.g., in a 6-max game), the SB's range must be even tighter because of the increased risk.
• Post-flop skill: If the SB has a significant skill edge post-flop, they might prefer a smaller open to induce play, but the push/fold strategy simplifies decision-making.

Limitations

The SB 25bb push/fold strategy is a baseline that ignores more nuanced options like min-raising or limp-shoving. In practice, many players deviate from strict push/fold at 25bb to exploit opponents or based on table dynamics. Solver solutions often show mixed strategies where some hands are shoved and some are called, but the pure push/fold model remains a solid starting point for beginners.

Conclusion

SB 25bb Push Fold is a fundamental concept for understanding stack depth strategy in no-limit hold'em. It helps players avoid difficult post-flop decisions with medium stacks and reduces the potential for costly mistakes.