Deep Stack Cash Game Preflop Range Construction Guide

Position Scene Description

Deep-stack cash games typically refer to effective stack depths exceeding 200BB. At this depth, preflop ranges need to be more flexible due to higher implied odds and greater postflop maneuverability. Preflop ranges should be adjusted based on position (UTG, MP, CO, BTN, SB, BB). Generally, the earlier the position, the tighter the range; the later the position, the wider the range, with SB and BB needing to account for positional disadvantage.

Recommended Ranges

• UTG (Under the Gun): Approximately 12-14% of hands, including AA-99, AKs-AQs, AKo, A5s. Can add a few suited connectors like T9s, but overall leans toward strong hands.
• MP (Middle Position): Approximately 16-18%, adding AJo, KQo, suited connectors such as 98s, 87s, and pairs 66-88 to the UTG range.
• CO (Cutoff): Approximately 22-25%, widening the pair range to 55+, adding more suited Ax (A2s-A5s) and suited connectors like 76s, 65s, as well as some suited broadways (KJs, QTs).
• BTN (Button): Approximately 30-35%, able to play many speculative hands, including all pairs (22+), all suited Ax, suited connectors 54s+, and some suited gappers like 97s, 86s.
• SB (Small Blind): Approximately 18-20%, should avoid wide ranges due to postflop positional disadvantage. Recommended includes pairs 55+, AJs+, KJs+, suited connectors T9s+, and some AJo and KQo.
• BB (Big Blind): Defending range approximately 30-50% depending on opponent's raise size. Against a small raise (2-2.5BB), can call with a wider range including all pairs, suited connectors, some suited Ax, and suited broadways; against a standard raise (3-4BB), should tighten to about 35%.

Range Construction Logic

In deep stacks, the value of suited connectors and pocket pairs increases because they can hit disguised strong hands (straights, flushes, sets), thereby winning large pots postflop. Meanwhile, high cards like AK/AQ remain important but are prone to reverse implied odds postflop—when you pair up and an opponent holds a stronger hand, deep stacks lead to larger losses. Therefore, range construction should balance three elements: strong hands (high pairs, AK), speculative hands (small pairs, suited connectors), and blockers (Ax, Kx), to maintain balance across different board textures.

Adjustment Factors

• Opponent Style: Against tight-passive players, you can raise wider (especially on BTN and CO) to exploit fold equity; against loose-aggressive players, tighten preflop ranges and increase 4bet frequency to avoid playing marginal hands out of position.
• Stack Depth: Over 300BB, favor playing suited connectors and pocket pairs due to higher implied odds; in super deep stacks (500BB+), even consider suited junk like J8s, but only in good position and against passive opponents.
• Raise Sizing: Standard preflop raise is typically 3BB + 1BB per limper. In deep stacks, raises can be slightly larger (4-5BB) to reduce opponents' implied odds; 3bet sizing is usually 3x-4x, and can be slightly smaller in late position.
• Position: The later the position, the wider the range; the earlier, the tighter. SB and BB defending ranges need precise adjustment based on raise size and opponent tendencies.

GTO Reference

Theoretically, GTO preflop ranges change with stack depth. In deep stacks, size differentiation becomes more common: big hands (AA/KK) can raise or 3bet larger, while speculative hands call, to maintain range balance. Common references:

• Facing UTG raise, BTN's calling range is about 12-16%, 3bet range about 4-6% (including AA/KK, AKs, and some A5s as bluffs).
• Facing CO raise, BTN's calling range can expand to 20-25%, 3bet range about 6-8%. However, note that GTO models assume perfect play from opponents; in actual games, adjustments based on opponent deviations are necessary.

Practical Applications

• Example 1: UTG raises to 3BB, you have 87s on BTN. Call? Due to deep stacks and good position, typically call, expecting to extract value by hitting a straight or pair postflop. If UTG is tight-aggressive with a narrow range, consider 4bet bluffing (with small suited connectors) or folding.
• Example 2: SB, CO raises to 3BB, you hold AJo. Fold? Usually recommended to fold because AJo performs poorly out of position against CO's range (prone to being squeezed). If CO is very loose and folds often, you could 3bet to 9BB to isolate, but proceed cautiously postflop.
• Example 3: You are in BB, BTN raises to 2.5BB, effective stacks 250BB. Holding T9s, calling is standard because deep stacks and good odds offer postflop opportunities for straights or flushes.

Final reminder: In deep-stack cash games, preflop is just the foundation; postflop skills (such as hand reading, bet sizing, river decisions) are more critical. It is recommended to systematically learn postflop strategies and continuously review and optimize your ranges through actual play.