PokerSolver
PokerSolver/5-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs BTN 3-bet 4bb

SB vs BTN 3-bet 4bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · BTN limps, SB isolates to 2bb, BTN 3-bets to 4bb · Small blind to act

5-max · 250bb · 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

610 of 1,326 combos get here
Fold 20.1%Call 69.4%Raise 9.2bb 6.3%All-in 249.84bb 4.2%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when BTN limps, SB isolates to 2bb, BTN 3-bets to 4bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 250bb?

BTN limps, SB isolates to 2bb, BTN 3-bets to 4bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 250bb: the small blind (SB) folds 20.1%, calls 69.4%, raises 9.2bb 6.3% and goes all-in 249.84bb 4.2%. Always call: TT, 66-77, 22-44, AJs, A3s-A4s, KTs, K5s-K8s, Q9s, JTs, J8s, T6s, 98s, 87s, 75s, ATo, A4o, KQo, KTo, QJo, T8o. Always all-in 249.84bb: AKo. Mixed: JJ+, 88-99, 55, AQs+, A5s-ATs, A2s, KJs+, K9s, K4s, K2s, QTs+, Q6s-Q8s, Q3s, J9s, T7s+, 97s, 85s-86s, 76s, 74s, 64s+, 53s+, AJo-AQo, A8o-A9o, A5o-A6o, A3o, KJo, K9o, K6o, QTo, J9o+, T9o, 98o, 76o.

Always fold
No hand plays this every time
Always call
TT, 66-77, 22-44, AJs, A3s-A4s, KTs, K5s-K8s, Q9s, JTs, J8s, T6s, 98s, 87s, 75s, ATo, A4o, KQo, KTo, QJo, T8o
Always raise 9.2bb
No hand plays this every time
Always all-in 249.84bb
AKo
Mixed
JJ+, 88-99, 55, AQs+, A5s-ATs, A2s, KJs+, K9s, K4s, K2s, QTs+, Q6s-Q8s, Q3s, J9s, T7s+, 97s, 85s-86s, 76s, 74s, 64s+, 53s+, AJo-AQo, A8o-A9o, A5o-A6o, A3o, KJo, K9o, K6o, QTo, J9o+, T9o, 98o, 76o
Settings: 5-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 24.98). 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.