PokerSolver
PokerSolver/6-max · 40bb · 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) · 40bb · CO limps, SB isolates to 2bb, CO 3-bets to 4bb · Small blind to act

6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 7.96bbYour cards?
2bb
1bb
4bb

Tap your two cards.

Small blind's range

408 of 1,326 combos get here
Fold 47.3%Call 25.8%Raise 9.2bb 11.3%All-in 39.84bb 15.6%
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 40bb?

CO limps, SB isolates to 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 40bb: the small blind (SB) folds 47.3%, calls 25.8%, raises 9.2bb 11.3% and goes all-in 39.84bb 15.6%. Always call: 55-66, A9s, KJs. Always raise 9.2bb: QQ+. Always all-in 39.84bb: AQo. Mixed: 77-JJ, ATs-AJs, A3s-A7s, KQs, K7s-KTs, Q8s+, J8s-J9s, T8s+, 96s+, 86s+, 74s-75s, 65s, 54s, AKo, A8o-AJo, KTo+.

Always fold
T7s, 85s, 76s, QJo, JTo
Always call
55-66, A9s, KJs
Always raise 9.2bb
QQ+
Always all-in 39.84bb
AQo
Mixed
77-JJ, ATs-AJs, A3s-A7s, KQs, K7s-KTs, Q8s+, J8s-J9s, T8s+, 96s+, 86s+, 74s-75s, 65s, 54s, AKo, A8o-AJo, KTo+
Settings: 6-max · 40bb · 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, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.