PokerSolver
PokerSolver/6-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs CO 3-bet 4bb

SB vs CO 3-bet 4bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO limps, SB isolates to 2bb, CO 3-bets to 4bb · Small blind to act

6-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 7.96bbYour cards?
2bb
1bb
4bb

Tap your two cards.

Small blind's range

388 of 1,326 combos get here
Fold 35.9%Call 40.7%Raise 9.2bb 11.8%All-in 79.84bb 11.7%
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 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

CO limps, SB isolates to 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the small blind (SB) folds 35.9%, calls 40.7%, raises 9.2bb 11.8% and goes all-in 79.84bb 11.7%. Always call: 88, 66, AQs, QTs. Always raise 9.2bb: AA. Mixed: 99-KK, 77, 55, AKs, A3s-AJs, K5s+, QJs, Q9s, J8s+, T7s+, 97s+, 86s+, 75s+, 65s, 53s+, ATo+, A5o, KJo+, QTo+, JTo, T9o.

Always fold
No hand plays this every time
Always call
88, 66, AQs, QTs
Always raise 9.2bb
AA
Always all-in 79.84bb
No hand plays this every time
Mixed
99-KK, 77, 55, AKs, A3s-AJs, K5s+, QJs, Q9s, J8s+, T7s+, 97s+, 86s+, 75s+, 65s, 53s+, ATo+, A5o, KJo+, QTo+, JTo, T9o
Settings: 6-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.92). 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.