CO 25bb Bubble Play

Overview

The CO (cutoff) position with 25 big blinds on the tournament bubble presents a delicate strategic situation. The bubble is the phase just before the money, where players become risk-averse to avoid busting without a payout. With 25bb (a medium stack), you have enough chips to apply pressure but not enough to withstand multiple losses. The cutoff offers the advantage of acting before the button and blinds, allowing you to steal blinds and antes profitably. However, you must navigate ICM (Independent Chip Model) pressure from shorter stacks and potential reshoves from big stacks.

ICM Considerations

ICM assigns real-money value to chips based on payout structure. On the bubble, chips lost are worth more than chips gained. With 25bb, your stack is valuable – busting costs you about 2x the min-cash in equity. This means you should:

• Avoid marginal all-in confrontations against stacks that cover you (players with >25bb).
• Apply pressure to stacks with 10-20bb, as they are often folding too much due to bubble fear.
• Be aware that players with very short stacks (≤10bb) may call with wider ranges to survive, so open light cautiously against them.

Preflop Strategy

Opening Ranges

Your open-raising range from CO with 25bb should be relatively tight but still aggressive. A typical GTO-based range might include: 22+, A2s+, K9s+, Q9s+, J9s+, T9s, 98s, 87s, ATo+, KJo+, QJo. However, adjust based on table dynamics:

• Tight bubble (many players folding): Widen to steal more.
• Aggressive bubble (frequent 3-bets or reshoves): Tighten to defend your stack.
• Short stacks behind (SB/BB have ≤15bb): Avoid opening hands that cannot call a shove; prefer suited connectors and pairs that play well postflop.

Facing 3-bets

When 3-bet, consider the 3-bettor's stack and position. Against a 3-bet from a big stack (>25bb), you can often call with strong hands (TT+, AJ+, KQ) and fold weaker opens to avoid getting trapped. Against a medium stack (15-25bb), a 4-bet shove can be effective with hands that have good equity vs their calling range. Against short stacks, their shoves are often wide, so call with strong hands that dominate their range.

Postflop Play

Since you have 25bb, you can also flat call opens from earlier positions in multiway pots. Postflop, avoid marginal spots when stacks are deep. C-betting on dry flops is standard, but with bubble ICM, you can overfold to check-raises from big stacks. When you hit strong hands, extract value but be cautious – a big stack may bluff you off the best hand. Use pot control with medium-strength hands to avoid huge pots.

Adjustments

• In the money already? If the bubble bursts and you're in the money, loosen up and play more aggressively to accumulate chips for deeper pay jumps.
• Table image: If you've been tight, a wider open can be profitable; if perceived as aggressive, tighten up and trap.
• Opponent types: Exploit nits by stealing more; avoid battles with calling stations unless you have a strong hand.

Summary

Playing CO with 25bb on the bubble requires a balanced approach: steal blinds while respecting ICM, avoid marginal all-ins against covering stacks, and adjust to table dynamics. The goal is to survive the bubble with your stack intact or improved, setting yourself up for a deep run.