PokerSolver/6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs CO 3-bet 4bb

SB vs CO 3-bet 4bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · CO limps, SB isolates to 2bb, CO 3-bets to 4bb · Small blind to act

6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differUTGHJCOBTNSBBB

Pot 7.96bbYour cards?

2bb

1bb

4bb

Tap your two cards.

Small blind's range

430 of 1,326 combos get here

Fold 43%Call 24.6%All-in 19.84bb 32.3%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when CO limps, SB isolates to 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

CO limps, SB isolates to 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the small blind (SB) folds 43%, calls 24.6% and goes all-in 19.84bb 32.3%. Always all-in 19.84bb: JJ-KK, 66-99, AJs-AQs, AJo+. Mixed: 55, A2s-ATs, K8s+, K4s-K6s, QTs+, J9s+, T8s+, 97s, 87s, 76s, A7o-ATo, A5o, KQo, QTo+, JTo.

Always fold: Q9s, T6s, 98s, 75s, KTo, T9o
Always call: No hand plays this every time
Always all-in 19.84bb: JJ-KK, 66-99, AJs-AQs, AJo+
Mixed: 55, A2s-ATs, K8s+, K4s-K6s, QTs+, J9s+, T8s+, 97s, 87s, 76s, A7o-ATo, A5o, KQo, QTo+, JTo

Settings: 6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 20bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.9). A jackpot fee on bigger pots is not in this solve, so lines that build big pots may be slightly too loose. Bet sizes are the solved ones; a size that is not here plays like the nearest one.

Fits exactly: no game we have checked.

Close: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: the ante from 93 of our own CoinPoker hands at $0.25/$0.50 with a $0.08 ante, played 2026-09-30; the caps and the preflop rule from coinpoker.com/games/texas-holdem/, fetched 2026-10-31.