PokerSolver
PokerSolver/5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs BTN 4-bet 20.7bb

SB vs BTN 4-bet 20.7bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · 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
5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 31.5bbYour cards?
9bb
1bb
20.7bb

Tap your two cards.

Small blind's range

340 of 1,326 combos get here
Fold 52.8%Call 27.3%All-in 99.84bb 19.9%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

BTN opens 3bb, SB 3-bets to 9bb, BTN 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the small blind (SB) folds 52.8%, calls 27.3% and goes all-in 99.84bb 19.9%. Always call: 66, A9s-AQs, KJs+, QTs+, 87s, 76s, 65s, 54s. Always all-in 99.84bb: JJ+, AKs, A3s-A5s, AKo. Mixed: 77-TT, 55, A7s-A8s, A2s, Q9s, 98s, AQo, KQo.

Always fold
44, A6s, K5s-KTs, J8s+, T7s+, ATo-AJo, KTo-KJo, QTo+, JTo
Always call
66, A9s-AQs, KJs+, QTs+, 87s, 76s, 65s, 54s
Always all-in 99.84bb
JJ+, AKs, A3s-A5s, AKo
Mixed
77-TT, 55, A7s-A8s, A2s, Q9s, 98s, AQo, KQo
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.

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.