PokerSolver
PokerSolver/4-max · 80bb · 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) · 80bb · CO limps, SB isolates to 2.5bb, CO 3-bets to 5bb · Small blind to act

4-max · 80bb · 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

372 of 1,326 combos get here
Fold 44.8%Call 32.1%Raise 11.5bb 14.1%All-in 79.84bb 8.9%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

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, 80bb: the small blind (SB) folds 44.8%, calls 32.1%, raises 11.5bb 14.1% and goes all-in 79.84bb 8.9%. Always call: 88, 66, JTs, T8s, 53s. Always raise 11.5bb: AA. Always all-in 79.84bb: AKo. Mixed: 99-KK, 77, 55, A2s+, K4s+, Q8s+, J8s-J9s, J5s, T9s, T7s, 97s, 87s, 75s+, 64s+, 54s, ATo-AQo, KQo, QTo+.

Always fold
98s, KJo
Always call
88, 66, JTs, T8s, 53s
Always raise 11.5bb
AA
Always all-in 79.84bb
AKo
Mixed
99-KK, 77, 55, A2s+, K4s+, Q8s+, J8s-J9s, J5s, T9s, T7s, 97s, 87s, 75s+, 64s+, 54s, ATo-AQo, KQo, QTo+
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.