Cutoff CO Position Opening Range Guide: How to Precisely Attack the Pot

The Strategic Value of the Cutoff Position

The Cut Off (CO) is located to the right of the Button (BTN) and is the last non-blind position to act before the flop. The advantages of the CO position include:

• The ability to observe the actions of players in earlier positions, gaining informational advantage.
• Post-flop positional advantage, allowing control over pot size.
• Easier to steal blinds compared to earlier positions, especially against the small and big blinds.

However, the CO must also watch out for squeezes from the BTN and resteals from the blinds. Therefore, the CO's opening range needs to balance value hands with bluffs while considering game dynamics.

Standard CO Opening Range (No Previous Action, Facing Blinds)

Below is a typical CO opening raise range for a 6-max cash game (assuming a raise size of 2.5-3BB). This range includes approximately 22% of hands and is suitable for beginner to intermediate players.

• Strong hands (value raises): Pocket pairs TT+, AK, AQ, AJs, ATs, KQs. These hands are strong enough to isolate and extract value.
• Medium hands: AJo, ATo, KQo, KJs, KTs, QJs, QTs, JTs, T9s, 98s, 87s. These hands have good development potential and typically lead against the blinds' defending ranges.
• Steals and structured hands: A9s-A2s, A5o-A2o (note: A5o/A4o have blocking effects), K9s, Q9s, J9s, T8s, 97s, 86s, 76s, 65s. These hands are used to maintain aggression frequency while having decent drawing potential.

Typical range example (approximately 22% of hands): TT+, ATs+, KTs+, QTs+, JTs, T9s, 98s, 87s, 76s, 65s, AJo+, KQo, ATo, KJo, QJo, and some suited connectors like 54s.

Note: The actual range should be adjusted based on table dynamics. Loosen up in aggressive games, tighten up in passive games.

Adjustments for Different Situations

When There Are Limpers Ahead

• If there are one or more limpers, tighten your range, only raising strong value hands (e.g., JJ+, AQ+). Avoid using marginal hands to isolate and end up in multi-way pots.
• Consider raising larger (4-5BB) to drive out weak hands.

When the Blinds Are Tight-Passive

• Expand your stealing range, adding hands like A2s, K8s, Q8s.
• Reduced difficulty in post-flop execution, as tight-passive players are more likely to fold.

When the Blinds Are Loose-Aggressive

• Tighten your stealing range, keeping more strong hands ready for 3-bets.
• Avoid using easily dominated hands (like AJo) against them, as loose-aggressive players will frequently 3-bet or attack after calling.

Common Mistakes and Advice

1. Range too passive: Many players only play strong hands in the CO, leading to insufficient win rate. Add more structured and stealing hands to maintain an opening frequency of around 20-25%.
2. Ignoring position: Marginal hands in the CO (e.g., KJo) can be raised, but be cautious post-flop if you hit top pair, as the BTN behind may hold stronger holdings.
3. Monotonous raise size: Use a smaller size (2BB) against weak blinds; use 3-3.5BB against strong calling stations.
4. Neglecting the BTN's presence: After you raise in the CO, the BTN may use a squeeze strategy. Therefore, your calling or 4-bet range against the BTN should be more conservative.

Conclusion

The CO opening range is a core component of profitability. A standard range is about 22%, including value hands, medium hands, and stealing/structured hands. In practice, adjust based on opponent types, number of players in front, and blind styles. Remember: The CO's advantage lies in position, but don't overuse it; maintain balance for long-term profit.

Hope this article helps you build a more precise CO strategy. Feel free to test and optimize your range in actual games.