PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs BTN 3-bet 4bb

SB vs BTN 3-bet 4bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO opens 2bb, BTN 3-bets to 4bb · Small blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differCOBTNSBBB

Pot 8.14bbYour cards?

0.5bb

1bb

2bb

4bb

Tap your two cards.

Small blind's range

1,326 of 1,326 combos get here

Fold 91.9%Call 2.1%Raise 9.2bb 2.7%All-in 99.84bb 3.4%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when CO opens 2bb, BTN 3-bets to 4bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO opens 2bb, BTN 3-bets to 4bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the small blind (SB) folds 91.9%, calls 2.1%, raises 9.2bb 2.7% and goes all-in 99.84bb 3.4%. Mixed: 66+, ATs+, A3s-A5s, KJs+, K9s, K7s, QTs+, 96s, AJo+.

Always fold: 22-55, A6s-A9s, A2s, KTs, K8s, K2s-K6s, Q2s-Q9s, J2s+, T2s+, 97s+, 92s-95s, 82s+, 72s+, 62s+, 52s+, 42s+, 32s, A2o-ATo, K2o+, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call: No hand plays this every time
Always raise 9.2bb: No hand plays this every time
Always all-in 99.84bb: No hand plays this every time
Mixed: 66+, ATs+, A3s-A5s, KJs+, K9s, K7s, QTs+, 96s, AJo+

Settings: 4-max · 100bb · 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, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.