PokerSolver
PokerSolver/6-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs BTN 4-bet 20.7bb

SB vs BTN 4-bet 20.7bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · BTN opens 3bb, SB 3-bets to 9bb, BTN 4-bets to 20.7bb · Small blind to act

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
6-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 31.66bbYour cards?
9bb
1bb
20.7bb

Tap your two cards.

Small blind's range

318 of 1,326 combos get here
Fold 40.8%Call 44.2%Raise 45.54bb 9.5%All-in 249.84bb 5.5%
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 3bb, SB 3-bets to 9bb, BTN 4-bets to 20.7bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 250bb?

BTN opens 3bb, SB 3-bets to 9bb, BTN 4-bets to 20.7bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 250bb: the small blind (SB) folds 40.8%, calls 44.2%, raises 45.54bb 9.5% and goes all-in 249.84bb 5.5%. Always call: QQ, TT, 33-77, ATs-AQs, KQs, QTs+, 98s, 87s, 76s, 65s. Always raise 45.54bb: AA. Always all-in 249.84bb: AKo. Mixed: KK, JJ, 88-99, AKs, A3s-A9s, KTs-KJs, Q9s, J9s+, T8s+, AQo.

Always fold
A2s, K5s-K9s, ATo-AJo, KJo+, QJo, JTo
Always call
QQ, TT, 33-77, ATs-AQs, KQs, QTs+, 98s, 87s, 76s, 65s
Always raise 45.54bb
AA
Always all-in 249.84bb
AKo
Mixed
KK, JJ, 88-99, AKs, A3s-A9s, KTs-KJs, Q9s, J9s+, T8s+, AQo
Settings: 6-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 29.27). 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.

Rake sources for the games it fits: 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.