PokerSolver/6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs CO 3-bet 5bb

SB vs CO 3-bet 5bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · CO limps, SB isolates to 2.5bb, CO 3-bets to 5bb · Small blind to act

6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differUTGHJCOBTNSBBB

Pot 9.46bbYour cards?

2.5bb

1bb

5bb

Tap your two cards.

Small blind's range

400 of 1,326 combos get here

Fold 47.2%Call 13.9%All-in 19.84bb 38.9%

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 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

CO limps, SB isolates to 2.5bb, CO 3-bets to 5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the small blind (SB) folds 47.2%, calls 13.9% and goes all-in 19.84bb 38.9%. Always call: Q8s. Always all-in 19.84bb: 66-KK, AJs+, KJs, AQo+, ATo. Mixed: AA, 55, A3s-ATs, KQs, KTs, K8s, QTs+, J8s+, T7s+, 98s, 87s, 76s, 54s, A7o-A9o, KTo+, QTo.

Always fold: Q9s, A5o, QJo, JTo
Always call: Q8s
Always all-in 19.84bb: 66-KK, AJs+, KJs, AQo+, ATo
Mixed: AA, 55, A3s-ATs, KQs, KTs, K8s, QTs+, J8s+, T7s+, 98s, 87s, 76s, 54s, A7o-A9o, KTo+, QTo

Settings: 6-max · 20bb · 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, 20bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.9). 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.

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.