PokerSolver
PokerSolver/Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/SB vs BB 3-bet 4bb

SB vs BB 3-bet 4bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · SB opens 2bb, BB 3-bets to 4bb · Small blind / button to act

Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 6.32bbYour cards?
2bb
4bb

Tap your two cards.

Small blind / button's range

1,106 of 1,326 combos get here
Fold 12.4%Call 72.5%Raise 9.2bb 13.3%All-in 99.84bb 1.8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind / button (SB) when SB opens 2bb, BB 3-bets to 4bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 100bb?

SB opens 2bb, BB 3-bets to 4bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 100bb: the small blind / button (SB) folds 12.4%, calls 72.5%, raises 9.2bb 13.3% and goes all-in 99.84bb 1.8%. Always call: 22-66, A8s, A2s-A4s, KTs, K7s-K8s, K3s-K5s, Q8s, Q6s, Q2s-Q4s, J8s, J2s-J6s, T6s+, T4s, T2s, 92s+, 86s+, 83s-84s, 73s, 62s-64s, 52s, 42s+, 32s, A7o, A2o-A5o, KTo, K7o-K8o, K5o, Q8o+, Q6o, J7o-J9o, T9o, 98o, 86o+, 75o+, 65o, 53o+, 43o. Always raise 9.2bb: QQ+, AQs+, AKo, AJo. Mixed: 77-JJ, A9s-ATs, A5s-A7s, KQs, K9s, K6s, K2s, Q9s+, Q7s, Q5s, J9s+, J7s, T5s, T3s, 85s, 74s-75s, 65s, AQo, A8o-ATo, A6o, KJo+, K9o, K6o, K3o, Q7o, Q4o-Q5o, JTo, J4o-J5o, T6o-T8o, 95o-96o, 85o.

Always fold
J6o, T4o
Always call
22-66, A8s, A2s-A4s, KTs, K7s-K8s, K3s-K5s, Q8s, Q6s, Q2s-Q4s, J8s, J2s-J6s, T6s+, T4s, T2s, 92s+, 86s+, 83s-84s, 73s, 62s-64s, 52s, 42s+, 32s, A7o, A2o-A5o, KTo, K7o-K8o, K5o, Q8o+, Q6o, J7o-J9o, T9o, 98o, 86o+, 75o+, 65o, 53o+, 43o
Always raise 9.2bb
QQ+, AQs+, AKo, AJo
Always all-in 99.84bb
No hand plays this every time
Mixed
77-JJ, A9s-ATs, A5s-A7s, KQs, K9s, K6s, K2s, Q9s+, Q7s, Q5s, J9s+, J7s, T5s, T3s, 85s, 74s-75s, 65s, AQo, A8o-ATo, A6o, KJo+, K9o, K6o, K3o, Q7o, Q4o-Q5o, JTo, J4o-J5o, T6o-T8o, 95o-96o, 85o
Settings: Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 8.9). 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.