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

SB vs CO 3-bet 5bb

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 2.5bb, CO 3-bets to 5bb · 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 9.14bbYour cards?
2.5bb
1bb
5bb

Tap your two cards.

Small blind's range

358 of 1,326 combos get here
Fold 36%Call 39.2%Raise 11.5bb 15.5%All-in 99.84bb 9.3%
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 2.5bb, CO 3-bets to 5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, SB isolates to 2.5bb, CO 3-bets to 5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the small blind (SB) folds 36%, calls 39.2%, raises 11.5bb 15.5% and goes all-in 99.84bb 9.3%. Always call: TT, 66-88, KJs, 76s. Always raise 11.5bb: AKs. Always all-in 99.84bb: KK. Mixed: AA, JJ-QQ, 99, 55, A4s-AQs, A2s, KQs, K7s-KTs, K5s, K2s-K3s, Q9s+, Q6s, J8s+, T7s+, 97s+, 86s+, 75s, 64s+, 53s+, AJo+, KQo.

Always fold
Q5s, ATo, QTo+, JTo
Always call
TT, 66-88, KJs, 76s
Always raise 11.5bb
AKs
Always all-in 99.84bb
KK
Mixed
AA, JJ-QQ, 99, 55, A4s-AQs, A2s, KQs, K7s-KTs, K5s, K2s-K3s, Q9s+, Q6s, J8s+, T7s+, 97s+, 86s+, 75s, 64s+, 53s+, AJo+, 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.