PokerSolver
PokerSolver/6-max · 40bb · 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) · 40bb · CO limps, SB isolates to 2.5bb, CO 3-bets to 5bb · Small blind to act

6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 9.46bbYour cards?
2.5bb
1bb
5bb

Tap your two cards.

Small blind's range

364 of 1,326 combos get here
Fold 43.6%Call 25.9%Raise 11.5bb 17.4%All-in 39.84bb 13%
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 40bb?

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, 40bb: the small blind (SB) folds 43.6%, calls 25.9%, raises 11.5bb 17.4% and goes all-in 39.84bb 13%. Always call: 55, QJs. Always raise 11.5bb: AA, ATo. Mixed: 66-KK, A3s-AQs, K8s+, Q9s-QTs, J8s+, T7s+, 96s+, 86s+, 75s+, 64s+, 54s, AJo+, A9o, KJo+.

Always fold
A8o, KTo, QTo+, JTo
Always call
55, QJs
Always raise 11.5bb
AA, ATo
Always all-in 39.84bb
No hand plays this every time
Mixed
66-KK, A3s-AQs, K8s+, Q9s-QTs, J8s+, T7s+, 96s+, 86s+, 75s+, 64s+, 54s, AJo+, A9o, KJo+
Settings: 6-max · 40bb · 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, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.