PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs CO 3-bet 9bb

SB vs CO 3-bet 9bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO limps, SB isolates to 3bb, CO 3-bets to 9bb · Small blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 13.64bbYour cards?
3bb
1bb
9bb

Tap your two cards.

Small blind's range

368 of 1,326 combos get here
Fold 65.7%Call 12.3%Raise 20.7bb 16.3%All-in 99.84bb 5.8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when CO limps, SB isolates to 3bb, CO 3-bets to 9bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, SB isolates to 3bb, CO 3-bets to 9bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the small blind (SB) folds 65.7%, calls 12.3%, raises 20.7bb 16.3% and goes all-in 99.84bb 5.8%. Always call: 55. Always raise 20.7bb: AA. Mixed: 66-KK, A7s+, A2s-A5s, KTs+, K7s, K4s, K2s, QJs, Q9s, JTs, 97s+, 87s, 76s, 65s, 53s+, AQo+, KQo.

Always fold
33, K8s-K9s, QTs, J9s, T7s+, 85s, 64s, AJo, QTo
Always call
55
Always raise 20.7bb
AA
Always all-in 99.84bb
No hand plays this every time
Mixed
66-KK, A7s+, A2s-A5s, KTs+, K7s, K4s, K2s, QJs, Q9s, JTs, 97s+, 87s, 76s, 65s, 53s+, AQo+, KQo
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.