CO 30bb ICM Spot

Overview

In poker tournaments, the term "CO 30bb ICM Spot" refers to a specific situation: the player is seated in the cutoff (the position two to the right of the button) with a stack of approximately 30 big blinds. At this stack depth, decisions are heavily influenced by ICM (Independent Chip Model), which converts chip counts into tournament equity (prize money value).

Position and Stack Depth

• CO (Cutoff): The cutoff is a late position, offering leverage over later positions (button, blinds) but less information than the button. With 30bb, the player can open-raise, limp, or fold, but is in the "push/fold" gray area—shoving is often too large, but raising can leave awkward stack sizes post-flop.
• 30bb: This is a common "medium stack" depth. It allows for standard raises (2-2.5bb) but commits a significant portion of the stack if called. Many tournament solvers suggest that at 30bb, hands should be played with a mix of open-raises and occasional shoves, depending on opponent tendencies and ICM pressure.

ICM Considerations

ICM becomes critical when approaching the money bubble or final table. Key factors:

• Bubble Factor: The penalty for busting relative to the reward for doubling up. With a 30bb stack, a player may be "medium stacked" but still vulnerable. Losing a showdown can eliminate them or cripple their equity, while doubling up may not drastically increase ICM value.
• Stack Distribution: If many short stacks exist, the CO should tighten their shoving range because ICM punishes risky plays. Conversely, if the player is among the shorter stacks, they may need to widen their push range to survive.

Typical Ranges (Example)

In a 9-handed tournament with equal stacks, a GTO-oriented approach for CO with 30bb might be:

• Open-raise: About 20-25% of hands, including strong pairs, suited aces, and broadway cards.
• Push: Against aggressive blinds, shoving hands like AJo+, 66+ can be profitable, but ICM may force tighter ranges near the bubble.
• Fold: Marginal hands like small suited connectors lose value due to the high risk of being re-raised or called.

Conclusion

Playing a CO 30bb ICM spot requires balancing chip accumulation with survival. The player must adjust ranges based on payout structure, table dynamics, and their own risk tolerance. Solvers show that ICM often suggests tighter play than chip-EV alone, especially when laddering is valuable.