PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs CO all-in

SB vs CO all-in

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO limps, SB isolates to 2.5bb, CO 3-bets to 7.5bb, SB 4-bets to 17.25bb, CO goes all-in · Small blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 118.73bbYour cards?
17.25bb
1bb
99.84bb

Tap your two cards.

Small blind's range

232 of 1,326 combos get here
Fold 76.8%Call 23.2%
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 7.5bb, SB 4-bets to 17.25bb, CO goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, SB isolates to 2.5bb, CO 3-bets to 7.5bb, SB 4-bets to 17.25bb, CO goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the small blind (SB) folds 76.8% and calls 23.2%. Always call: QQ+, AKs, AKo. Mixed: JJ, 88-99, 55-66, A9s.

Always fold
77, ATs-AQs, A7s-A8s, A4s-A5s, A2s, KQs, K8s-KTs, Q9s+, J9s+, T8s+, 97s, 87s, 65s, 54s, AJo-AQo, KQo
Always call
QQ+, AKs, AKo
Mixed
JJ, 88-99, 55-66, A9s
Settings: 4-max · 100bb · 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, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.