PokerSolver
PokerSolver/5-max · 200bb · 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) · 200bb · CO limps, SB isolates to 2bb, CO 3-bets to 4bb · Small blind to act

5-max · 200bb · 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

420 of 1,326 combos get here
Fold 18.4%Call 71.9%Raise 9.2bb 4.3%All-in 199.84bb 5.5%
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 200bb?

CO limps, SB isolates to 2bb, CO 3-bets to 4bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 200bb: the small blind (SB) folds 18.4%, calls 71.9%, raises 9.2bb 4.3% and goes all-in 199.84bb 5.5%. Always call: JJ-QQ, 33-99, A7s, A5s, KTs+, K5s-K7s, JTs, T9s, 64s, 54s, A9o-AQo, KJo. Mixed: KK+, TT, A8s+, A6s, A2s-A4s, K8s-K9s, K3s-K4s, Q9s+, Q7s, Q5s, J9s, T7s-T8s, 96s+, 86s+, 75s+, 65s, 53s, 43s, AKo, KQo, KTo, QTo+, JTo, T9o.

Always fold
No hand plays this every time
Always call
JJ-QQ, 33-99, A7s, A5s, KTs+, K5s-K7s, JTs, T9s, 64s, 54s, A9o-AQo, KJo
Always raise 9.2bb
No hand plays this every time
Always all-in 199.84bb
No hand plays this every time
Mixed
KK+, TT, A8s+, A6s, A2s-A4s, K8s-K9s, K3s-K4s, Q9s+, Q7s, Q5s, J9s, T7s-T8s, 96s+, 86s+, 75s+, 65s, 53s, 43s, AKo, KQo, KTo, QTo+, JTo, T9o
Settings: 5-max · 200bb · 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, 200bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.99). 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.