PokerSolver
PokerSolver/5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs CO 3-bet 5bb

SB vs CO 3-bet 5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 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

5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 9.3bbYour cards?
2.5bb
1bb
5bb

Tap your two cards.

Small blind's range

350 of 1,326 combos get here
Fold 40.1%Call 37.7%Raise 11.5bb 12.3%All-in 99.84bb 9.8%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

CO limps, SB isolates to 2.5bb, CO 3-bets to 5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the small blind (SB) folds 40.1%, calls 37.7%, raises 11.5bb 12.3% and goes all-in 99.84bb 9.8%. Always call: 88, 55-66, ATs, KJs, JTs, T9s. Always all-in 99.84bb: KK, AKo. Mixed: AA, 99-QQ, 77, AJs+, A7s-A9s, A2s-A5s, KQs, K9s-KTs, K7s, K5s, Q8s+, J9s, T7s-T8s, 96s+, 87s, 85s, 76s, 64s+, 54s, AJo-AQo, KJo+.

Always fold
86s, ATo, QTo
Always call
88, 55-66, ATs, KJs, JTs, T9s
Always raise 11.5bb
No hand plays this every time
Always all-in 99.84bb
KK, AKo
Mixed
AA, 99-QQ, 77, AJs+, A7s-A9s, A2s-A5s, KQs, K9s-KTs, K7s, K5s, Q8s+, J9s, T7s-T8s, 96s+, 87s, 85s, 76s, 64s+, 54s, AJo-AQo, KJo+
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.