PokerSolver
PokerSolver/6-max · 250bb · 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) · 250bb · CO limps, SB isolates to 2bb, CO 3-bets to 4bb · Small blind to act

6-max · 250bb · 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

436 of 1,326 combos get here
Fold 19.6%Call 72.2%Raise 9.2bb 3.8%All-in 249.84bb 4.4%
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 250bb?

CO limps, SB isolates to 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 250bb: the small blind (SB) folds 19.6%, calls 72.2%, raises 9.2bb 3.8% and goes all-in 249.84bb 4.4%. Always call: JJ, 44-99, A9s-ATs, A6s-A7s, A4s, K8s+, K4s-K6s, Q9s+, JTs, T8s, 97s, 87s, 76s, 65s, ATo-AQo, KTo+. Mixed: QQ+, TT, AJs+, A8s, A5s, A2s-A3s, K7s, Q7s-Q8s, J9s, T9s, T7s, 98s, 85s-86s, 74s-75s, 64s, 54s, 42s+, AKo, QJo, JTo, 76o, 65o.

Always fold
J9o, 54o
Always call
JJ, 44-99, A9s-ATs, A6s-A7s, A4s, K8s+, K4s-K6s, Q9s+, JTs, T8s, 97s, 87s, 76s, 65s, ATo-AQo, KTo+
Always raise 9.2bb
No hand plays this every time
Always all-in 249.84bb
No hand plays this every time
Mixed
QQ+, TT, AJs+, A8s, A5s, A2s-A3s, K7s, Q7s-Q8s, J9s, T9s, T7s, 98s, 85s-86s, 74s-75s, 64s, 54s, 42s+, AKo, QJo, JTo, 76o, 65o
Settings: 6-max · 250bb · 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, 250bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 29.27). 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.