STRATEGY Article: Deep-Stack Cash Game Preflop Strategy (Part 1/2)

Position Scenarios

The core characteristic of deep-stack cash games (typically 100BB–200BB effective stacks) is high implied odds and significant post-flop maneuverability. Position preflop heavily influences range: the later the position, the more hands you can play; the earlier the position, the tighter the range. The following uses a typical 9-handed table as an example, assuming no specific reads on opponents, with a preflop raise size of 2.5BB–3BB.

• UTG (Under the Gun): Earliest position, vulnerable to multiple re-raises or calls, requires a very strong range.
• MP (Middle Position): Relatively looser, but still has early position disadvantages.
• CO (Cutoff): Gains late position advantage, can raise more speculative hands.
• BTN (Button): Best position, can play the widest range.
• SB (Small Blind): Position disadvantage with 0.5BB already invested, needs strict defense.
• BB (Big Blind): Position disadvantage but with 1BB invested, higher defense frequency.

Recommended Ranges (Hand Types in Text)

Given deep-stack characteristics, ranges should include strong value hands, medium hands, and enough speculative hands (suited connectors, suited one-gappers, pairs, etc.). Below are recommended ranges approximating GTO style (note: exact percentages vary per player; these are typical examples).

UTG Range (About 12%–15% of Hands)

• Raise: All pocket pairs (44+), all suited aces (A2s+), offsuit AJ+, KQo, KJs+, QJs, JTs, T9s, 98s, 87s.
• Fold: Weak aces (A9o or worse), weak kings, trash hands.

MP Range (About 18%–22% of Hands)

• Raise: Adds small/medium pairs (22+) compared to UTG, wider suited connectors (76s+), offsuit AT+, KTo+, QJo, and includes some suited one-gappers (K9s, Q9s, etc.).
• Consider folding: Weak suited connectors (54s, 64s, etc.) are typically not raised, but can call.

CO Range (About 25%–30% of Hands)

• Raise: Adds more speculative hands, such as all pairs (22+), all suited aces, offsuit A8+, K9o+, Q9o+, JTo+, suited connectors (54s+), suited one-gappers (T8s, 97s, etc.), and some Axs (A2s–A5s) can be raised.
• Call: When facing an early position raise, can defend with weaker hands (e.g., small/medium pairs, suited connectors).

BTN Range (About 40%–45% of Hands)

• Raise: Very wide, including all pairs, all suited aces, offsuit A2+, most Kx (K2s+, K8o+), Qx (Q5s+, Q9o+), Jx (J7s+, J9o+), Tx (T6s+, T9o+), all suited connectors (54s+) and suited one-gappers (64s+), etc.
• Note: When facing a 3-bet from the blinds, need to fold appropriately, but defense frequency should be higher than in early positions.

SB Range (About 12%–15% of Hands; due to position disadvantage, usually not actively raising, or using a 3-bet or fold strategy)

• Raise (Blind Steal): If BTN folds, can raise about 40%–50% of hands, but in deep stacks SB steals require caution because BB defends deeply.
• Calling Range: Very narrow, typically only call with strong hands (TT+, AJs+, AQo+), otherwise fold or 3-bet.

BB Range (Wide Defense, About 50%–60% of Hands)

• Defense: When facing a raise from SB or BTN, can call with a wide range, such as all pairs, suited connectors, A-high hands, etc. But when facing UTG's raise, defense range needs to tighten.
• 3-bet: Value hands (AA, KK, AK) and appropriate bluffs (A5s, K9s, etc.), at a frequency of about 10%–15%.

Range Construction Logic

In deep-stack cash games, range construction must balance the following dimensions:

1. Playability: With deep stacks, hands that can hit strong draws or made hands post-flop have higher value. Therefore, suited connectors, suited aces, small/medium pairs, etc., offer high implied odds and should be prioritized.
2. Reverse Implied Odds: Weak aces (e.g., A9o) are easily dominated by better aces in deep stacks and are hard to fold, so they should be used less.
3. Position Advantage: Late position allows wider ranges, using position to execute bluffs and value bets.
4. Stack Depth: At 100BB, ranges can be relatively standard; at 200BB, speculative hands have higher value, allowing more marginal hands like 54s, suited one-gappers, etc.

Adjustment Factors

In actual play, dynamic adjustments should be made based on the following factors:

• Opponent Types: Against tight-passive players, you can loosen your stealing and aggressive ranges; against loose-aggressive players, tighten your 3bet range and increase bluff-catching hands.
• Preflop Raise Sizing: If opponents raise large (e.g., above 4BB), tighten your calling range and reduce speculative hands; if opponents raise small (2BB), you can loosen your defense.
• Stack Depth: Above 200BB, you can further include suited connectors and small/medium pairs; below 80BB, tighten speculative ranges and expand your 3bet range.
• Table Dynamics: If many players like to call, increase your value raises; if many players frequently 3bet, reduce stealing and adjust your 3bet defense range.

GTO Reference

GTO (Game Theory Optimal) preflop strategies are typically derived from solvers. The following are general conclusions for approximate GTO ranges at a typical 9-handed table with 100BB deep stacks:

• UTG raising range ~12%-14%, including strong pairs, strong high cards, and some suited connectors.
• MP raising range ~18%-22%, CO ~25%-30%, BTN ~40%-45%.
• 3bet range: Against early position, about 3%-5% of hands (e.g., JJ+, AK, A5s as bluffs); against late position, can expand to 8%-10% (e.g., TT+, AQ+, suited A bluffs).
• When facing a 3bet, the calling range should include some medium hands (e.g., 99, AJs) and speculative hands, and fold weak hands (e.g., KJo, AJo).

Note: GTO is only a balanced reference; in practice, deviating against specific opponents is more profitable.

Practical Application

Example: CO position, effective stack 150BB, folded to us. BTN and blinds are regular players.

• Holding T♦9♦ (suited 10-9): According to the recommended range, we should raise to 3BB. This hand is in the CO range and has good playability deep-stacked.
• If BTN 3bets to 9BB: Evaluate BTN's 3bet frequency. If the opponent is tight, fold; if loose, call (since we have position and the hand has good playability, calling is reasonable). If the opponent is loose-aggressive, we can also consider 4bet bluffing (the range includes T9s as a bluff combo).
• If BB calls, flop comes J♣8♦2♥: We have an open-ended straight draw (7 and Q), we can bet as a semi-bluff. If BB raises, depending on opponent tendencies, we can call or fold.

By pre-constructing clear preflop ranges and adjusting flexibly, decisions in deep-stack cash games become more systematic, reducing human error.