Deep-Stacked Cash Game Preflop Range Construction and Adjustment Strategy

Position Scenario Description

Deep stack cash games typically refer to effective stack depths of 200 BB or more (typically 250–500 BB). Due to changes in implied odds and reverse implied odds, preflop ranges need to be significantly tightened, especially against aggressive opponents. This article uses a 6-max table as an example, assuming opponents are regulars.

Recommended Ranges (by Position)

Under the Gun (UTG)

• Opening Range: Approximately 10%–12% of hands, including:
  • All pairs (22+)
  • All suited connectors (T9s+)
  • All suited Ax (A2s+)
  • AJo+, KQo
• Calling Range (facing a raise): Approximately 8%–10%, including small pairs (22–77), suited connectors (T9s–65s), suited one-gappers (J9s–86s), A2s–A5s (partially).
• 3bet Range: Approximately 3%–4%, including AA, KK, QQ, AKs, AKo (partially), and a few mixed A5s, KQs for balance.

Middle Position (MP)

• Opening Range: Approximately 16%–18%, adding to UTG's range:
  • All suited broadways (KTs+, QTs+)
  • All offsuit Ax down to ATo
  • All suited connectors down to 65s
• Calling Range: Approximately 14%–16%, including all pairs (22+, but AA, KK are usually 3bet), suited connectors, suited Ax, and some offsuit broadways (AJ+).
• 3bet Range: Approximately 5%–6%, the value part being TT+, AQ+, and the mixed part using blockers like A5s, K9s, etc.

Cutoff (CO)

• Opening Range: Approximately 22%–25%, including:
  • All pairs
  • All Ax suited
  • All suited connectors (including 54s)
  • All suited broadways
  • ATo+, KJo+, QJo
• Calling Range: Approximately 18%–20%, including small pairs, suited connectors, suited Ax, and some weaker suited hands (e.g., T8s).
• 3bet Range: Approximately 7%–8%, the value part being 99+, AJ+, and mixed with A4s, K8s, etc.

Button (BTN)

• Opening Range: Approximately 35%–40%, including:
  • All pairs
  • All Ax
  • All suited hands (Kx suited, Qx suited, Jx suited, Tx suited)
  • All connectors (including offsuit) such as KJo, QTo, JTo
  • Some weak suited connectors (64s+)
• Calling Range: Approximately 30%–35%, including a large portion of hands that were raised.
• 3bet Range: Approximately 10%–12%, the value part being 88+, AT+, and mixed with small suited Ax (A2s–A5s) and suited connectors (T9s–87s).

Small Blind (SB)

• Opening Range: Approximately 20%–22% (tighten against loose CO/BTN), including:
  • All pairs
  • All Ax suited
  • Suited connectors (T9s+)
  • Offsuit broadways (ATo+, KJo+)
• Calling Range: Must be cautious, especially against big blind squeezes. Suggested to only call with small to medium pairs (22–TT) and some suited connectors (T9s–65s), totaling about 8%–10%.
• 3bet Range: Approximately 4%–5%, the value part being JJ+, AK, and mixed with A5s, K9s.

Big Blind (BB)

• Defending Range: When facing a single raise, you need to defend about 45%–55% of hands (including calls and 3bets), because in deep stacks the positional disadvantage is amplified but implied odds are good.
• Calling Range: Approximately 40%–50%, including most pairs, suited hands, and connectors, excluding very weak hands like 72o.
• 3bet Range: Approximately 8%–10%, the value part being TT+, AQ+, and mixed with small suited Ax and suited connectors.

Range Construction Logic

The core adjustment for deep stacks is: increase hand quality, reduce implied odds for draws, avoid getting coolered with big pairs. Specific principles:

• Pairs: All pairs can be opened, but big pairs (KK, AA) may be slow-played deep because it's hard to stack opponents postflop.
• Suited Connectors: Playability increases, but you need medium-to-strong draws to effectively attack.
• Big Cards: Offsuit hands like AQo, KQo are easily dominated in deep stacks, so reduce opening frequency.
• Position: The later the position, the wider the range, but the gap between button and small blind is large; the small blind should tighten its opening range due to poor position.

Adjustment Factors

• Opponent Tendencies: Against very aggressive opponents, tighten your opening range and increase your calling and 3bet frequency; against passive opponents, widen your opening range.
• Stack Depth: Above 300 BB, further reduce opens with marginal hands because postflop mistakes are costly.
• Ante Structure: When antes are present, you can slightly widen your opening range to take advantage of dead money in the pot.
• Game Dynamics: If opponents fold frequently, you can widen your opening range; if opponents 3bet frequently, you need to adjust your 4bet range.

GTO Reference

Under the GTO framework, deep-stacked preflop strategy is closer to late tournament play (because implied odds matter), but cannot be applied directly. Generally:

• Raise sizes should adjust with stack depth: at 200-300 BB, raise 2.5-3 BB is appropriate; too small invites too many callers, too large exposes hand strength.
• 3-bet size is about 10-12 BB (when opponent raises 3 BB), 4-bet size is about 22-26 BB.
• Calling ranges need to defend against squeezes: facing a squeeze from the small blind, the big blind must defend about 45-55% of its continuing range (assuming the small blind's 3-bet range is around 7%).

Practical Application

1. Avoid frequent 3-bets with marginal hands: Deep-stacked, it is difficult to handle postflop after a 3-bet is called, unless there is clear balancing. Only 3-bet with strong hands and a very few mixed hands.
2. The big blind should defend moderately: Although implied odds are good deep-stacked, positional disadvantage cannot be overcome. Do not defend too many garbage hands (e.g., 72o, 83o).
3. Use positional advantage: The button can raise frequently, but be cautious after facing a 3-bet, especially when the opponent's range includes many suited connectors.
4. Beware of reverse implied odds: For example, holding TT against a deep-stacked opponent's raise, it is difficult to fold when overcards appear postflop; consider directly 3-betting or folding.

The above strategies are based on typical deep-stack cash game scenarios. Actual adjustments depend on opponents and dynamics.