PokerSolver
PokerSolver/5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs CO 3-bet 4bb

SB vs CO 3-bet 4bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO limps, SB isolates to 2bb, CO 3-bets to 4bb · Small blind to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 7.8bbYour cards?
2bb
1bb
4bb

Tap your two cards.

Small blind's range

438 of 1,326 combos get here
Fold 26.4%Call 60.9%Raise 9.2bb 5.3%All-in 149.84bb 7.5%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO limps, SB isolates to 2bb, CO 3-bets to 4bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the small blind (SB) folds 26.4%, calls 60.9%, raises 9.2bb 5.3% and goes all-in 149.84bb 7.5%. Always call: 55-99, A5s, K9s-KTs, JTs, T8s, 53s, AJo-AQo, KQo, JTo. Mixed: TT+, A6s+, A2s-A4s, KJs+, K7s-K8s, K5s, Q8s+, J8s-J9s, T9s, T7s, 96s+, 86s+, 74s+, 65s, 54s, AKo, ATo, A5o, KTo-KJo, QTo+.

Always fold
T9o, 98o
Always call
55-99, A5s, K9s-KTs, JTs, T8s, 53s, AJo-AQo, KQo, JTo
Always raise 9.2bb
No hand plays this every time
Always all-in 149.84bb
No hand plays this every time
Mixed
TT+, A6s+, A2s-A4s, KJs+, K7s-K8s, K5s, Q8s+, J8s-J9s, T9s, T7s, 96s+, 86s+, 74s+, 65s, 54s, AKo, ATo, A5o, KTo-KJo, QTo+
Settings: 5-max · 150bb · 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, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). 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.