PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs BTN 4-bet 11.5bb

SB vs BTN 4-bet 11.5bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · BTN opens 2.5bb, SB 3-bets to 5bb, BTN 4-bets to 11.5bb · Small blind to act

4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 18.14bbYour cards?
5bb
1bb
11.5bb

Tap your two cards.

Small blind's range

294 of 1,326 combos get here
Fold 34.5%Call 54.8%All-in 79.84bb 10.7%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when BTN opens 2.5bb, SB 3-bets to 5bb, BTN 4-bets to 11.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

BTN opens 2.5bb, SB 3-bets to 5bb, BTN 4-bets to 11.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the small blind (SB) folds 34.5%, calls 54.8% and goes all-in 79.84bb 10.7%. Always call: 44-JJ, AJs-AQs, KQs, K9s-KTs, QTs+, JTs, 76s, AJo-AQo. Always all-in 79.84bb: KK, AKs. Mixed: AA, A7s-A9s, A5s, A2s-A3s, K8s, Q9s, J9s, T9s.

Always fold
ATo, KTo-KJo, QJo, JTo
Always call
44-JJ, AJs-AQs, KQs, K9s-KTs, QTs+, JTs, 76s, AJo-AQo
Always all-in 79.84bb
KK, AKs
Mixed
AA, A7s-A9s, A5s, A2s-A3s, K8s, Q9s, J9s, T9s
Settings: 4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 80bb stacks, 5% rake capped at 4.8bb; 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.