PokerSolver/Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/SB vs BB 4-bet 20.7bb

SB vs BB 4-bet 20.7bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb · Small blind / button to act

Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differSBBB

Pot 30.02bbYour cards?

9bb

20.7bb

Tap your two cards.

Small blind / button's range

612 of 1,326 combos get here

Fold 55.9%Call 29.1%All-in 79.84bb 15%

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 limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 80bb?

SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 80bb: the small blind / button (SB) folds 55.9%, calls 29.1% and goes all-in 79.84bb 15%. Always call: AA, K6s, K2s, Q6s, Q3s, J6s, ATo-AJo, KQo, QTo+. Always all-in 79.84bb: TT, 77, 33, AKs, AQo+. Mixed: JJ-KK, 88-99, AQs, J3s, T2s, 62s, 32s, A3o-A4o, K9o, K6o, K4o, 65o.

Always fold: J2s, 93s-95s, A6o, A2o, K7o, K2o-K3o, Q8o-Q9o, Q4o, Q2o, J7o-J8o, T6o-T7o, 97o+
Always call: AA, K6s, K2s, Q6s, Q3s, J6s, ATo-AJo, KQo, QTo+
Always all-in 79.84bb: TT, 77, 33, AKs, AQo+
Mixed: JJ-KK, 88-99, AQs, J3s, T2s, 62s, 32s, A3o-A4o, K9o, K6o, K4o, 65o

Settings: Heads-up · 80bb · 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, 80bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 22.38). 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.