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

SB vs BB 3-bet 4bb

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

Heads-up · 100bb · SB 0.5bb · 5% rake, cap 3bbChange game
Stacks (bb), if they differ
Pot 6bbYour cards?
2bb
4bb

Tap your two cards.

Small blind / button's range

1,082 of 1,326 combos get here
Fold 24.1%Call 62.9%Raise 9.2bb 12.7%All-in 100bb 0.4%
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 · 5% rake, cap 3bb at 100bb?

SB opens 2bb, BB 3-bets to 4bb in Heads-up · SB 0.5bb · 5% rake, cap 3bb, 100bb: the small blind / button (SB) folds 24.1%, calls 62.9%, raises 9.2bb 12.7% and goes all-in 100bb 0.4%. Always call: 66-88, 22-44, A7s, A2s-A3s, K7s-K9s, K2s-K5s, Q8s, Q6s, Q3s-Q4s, J4s+, J2s, T7s, T3s-T4s, 97s+, 86s+, 84s, 73s, 63s-64s, 53s+, 42s, A3o-A8o, K9o-KTo, K7o, Q8o+, J9o+, T8o, 97o+, 87o, 76o, 65o, 53o+. Always raise 9.2bb: TT+, AQs+, KQs, AQo+. Mixed: 99, 55, A8s, A4s-A6s, KTs-KJs, K6s, Q9s+, Q7s, Q5s, J3s, T8s+, T5s-T6s, T2s, 92s-96s, 85s, 83s, 74s+, 72s, 62s, 52s, 32s, A9o-AJo, A2o, KJo+, K8o, K3o-K6o, Q4o-Q7o, J7o-J8o, T9o, T6o-T7o, 96o, 86o, 75o.

Always fold
J3o-J6o, T4o-T5o, 95o, 85o, 74o, 64o
Always call
66-88, 22-44, A7s, A2s-A3s, K7s-K9s, K2s-K5s, Q8s, Q6s, Q3s-Q4s, J4s+, J2s, T7s, T3s-T4s, 97s+, 86s+, 84s, 73s, 63s-64s, 53s+, 42s, A3o-A8o, K9o-KTo, K7o, Q8o+, J9o+, T8o, 97o+, 87o, 76o, 65o, 53o+
Always raise 9.2bb
TT+, AQs+, KQs, AQo+
Always all-in 100bb
No hand plays this every time
Mixed
99, 55, A8s, A4s-A6s, KTs-KJs, K6s, Q9s+, Q7s, Q5s, J3s, T8s+, T5s-T6s, T2s, 92s-96s, 85s, 83s, 74s+, 72s, 62s, 52s, 32s, A9o-AJo, A2o, KJo+, K8o, K3o-K6o, Q4o-Q7o, J7o-J8o, T9o, T6o-T7o, 96o, 86o, 75o
Settings: Heads-up · 100bb · SB 0.5bb · 5% rake, cap 3bb (small blind 0.5bb, big blind 1bb, 100bb stacks, 5% rake capped at 3bb; before the flop, rake only after a 3-bet). Solver: HoldemResources Calculator (HRC) (HRC CI 14.45). 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: GGPoker regular cash NL2, NL10 (rake cap 2.5bb there, 3bb here).

Close: GGPoker regular cash NL50 (rake cap 2bb there, 3bb here).

Close: PokerStars cash NL10 (rake cap 5bb there, 3bb here; 4.25% rake there, 5% here; no rake when no flop is dealt there).

Close: PokerStars cash NL50 (rake cap 1.5bb there, 3bb here; no rake when no flop is dealt there).

Close: CoinPoker cash NL2, NL10 (rake cap 2.5bb there, 3bb here; only its tables without antes).

Close: CoinPoker cash NL50 (rake cap 2bb there, 3bb here; only its tables without antes).

Close: WPT Global cash NL10, NL20 (4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: WPT Global cash NL100, NL200 (rake cap 2bb there, 3bb here; 4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: Natural8 regular cash NL2, NL10 (rake cap 2.5bb there, 3bb here).

Close: Natural8 regular cash NL50 (rake cap 2bb there, 3bb here).

Close: ACR Poker cash NL10 (rake cap 5bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

CoinPoker tables with antes: their own chart.

Rake sources: ggpoker.com/poker-games/texas-holdem (fetched 2026-10-31); Rush rake and preflop rake confirmed on our own GG exports (972 of 1,034 pots, 210 of 211); regular tables' preflop rule from natural8.com/en/poker/texas-holdem (same network, fetched 2026-10-31); pokerstars.com/poker/room/rake (fetched 2026-10-31); coinpoker.com/games/texas-holdem/ (caps and the preflop rule) and coinpoker.com/guides/poker-rake/ (5%), fetched 2026-10-31; wptglobal.com/poker/poker-table-rake (fetched 2026-10-31); natural8.com/en/poker/texas-holdem (fetched 2026-10-31; caps by players dealt in, 3-bet pots raked before the flop); acrpoker.eu/real-money/poker-rake-calculation/ (fetched 2026-10-31).

Rake: Wrong rake for GG: this solve caps the rake at 3bb, but GG caps heads-up NL200 at $1.50 (0.75bb). A solve with GG's cap is queued.