Strategy Article: SB Balanced Range Construction

Position Scenario Explanation

The small blind (SB) is one of the most disadvantageous positions preflop: not only do you act first postflop, but you have already invested 0.5BB in dead money. This means you cannot see a free flop like the big blind, nor do you have positional advantage like the button. Therefore, SB range construction must balance defense (protecting the dead money already invested) and aggression (using raises to steal pots).

Recommended Range (Text Description)

The following is a typical balanced range for 100BB effective stacks, cash games with no special reads on opponents.

• Value Raise Range (approx. 12%-15% of hands): Against all opponents, raise strong hands to 3BB. Includes: [TT]+ ([TT], [JJ], [QQ], [KK], [AA]), AQ+ (AQ, AK), [AQs] ([AK suited]), [KQs]. Some players also add 99, [AJs], [ATs], etc.
• Call Range (approx. 20%-25% of hands): Call with medium-strength hands to avoid frequent 3bets. Includes: [22]-[99], [A2s]-[AJs], [KJs], [QJs], [JTs], [T9s], [98s], [87s] and other small suited connectors, as well as some offsuit connectors like [KQo], [QJo].
• Defend 3bet Range (approx. 5%-8%): When the button or cutoff raises, 3bet with: TT+, AQ+, AJs, [KQs], and mix in a few bluffs like [A5s], [K9s].
• Fold Range: The remaining ~60% of hands (weak offsuit hands, trash hands) are folded directly.

Range Construction Logic

SB range design must balance two goals:

1. Defending dead money: Since you have already invested 0.5BB, the pot odds for calling are better. For example, facing a 3BB raise from the button, you need to call 2.5BB to win 4.5BB, odds of 1.8:1, requiring about 36% equity. Therefore, many medium pairs and suited connectors can call.
2. Attack disadvantage: SB is at a postflop disadvantage, so the raising range should be tighter and stronger, using larger raise sizes (usually 3-4BB) to force folds and capture dead money. Meanwhile, the calling range should avoid hands easily dominated (e.g., [A9o]), since they are hard to play postflop.

Adjustment Factors

• Opponent Style: Against aggressive frequent raisers, tighten the calling range and increase 3bet bluffs; against passive players, widen the calling range and play more postflop.
• Stack Depth: In deep stacks (200BB+), increase calling frequency with suited connectors to leverage implied odds; in short stacks (below 40BB), tighten the range and use more all-ins.
• Position Relationship: When SB vs button, the button has huge positional advantage, so SB range should be tighter. Against the SB's left (CO or HJ), you can be slightly looser.
• Opponent Call Range: If opponents frequently call 3bets, reduce bluff 3bets; if they fold often, increase raising frequency.

GTO Reference

According to modern GTO solvers (e.g., PioSolver, MonkerSolver) simulations, the SB in standard 100BB scenarios has a total VPIP (voluntary put in pot) of about 40%-45%, with raises about 15%, calls about 25%, and folds about 55%-60%. 3bet frequency is about 6%-8%. Note that GTO strategies assume perfect opponent responses; in practice, adjust based on opponent weaknesses.

Practical Application

Example scenario: 100BB effective stacks, button raises to 3BB, you are in SB.

• Holding TT: Either 3bet or call. If button folds often, 3bet is profitable; if opponent often calls, call and play postflop.
• Holding [A9s]: Call, because suited gives postflop draw potential and is less likely to be dominated.
• Holding [KJo]: Fold, because [KJo] is easily dominated by AK, AQ, etc., and is hard to play postflop.

Remember, the core of SB is to avoid over-investing. Even with the lure of dead money, stick to a balanced range to prevent being exploited.

Common Questions

Q: Should SB rarely enter pots?

A: No. Although position is bad, dead money provides potential profit; entering about 40% of the time is a balanced strategy.

Q: What raise size should SB use?

A: Usually 3-4BB. Larger sizes (e.g., 5BB) reduce the calling range but may lower equity when called.

Q: How to counter opponents who frequently 3bet?

A: Tighten the calling range, increase 4bet bluffs (e.g., [A5s], [A4s]), and reduce folds to 3bets.