PokerSolver
PokerSolver/4-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs BTN all-in

SB vs BTN all-in

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · BTN limps, SB isolates to 2.5bb, BTN 3-bets to 7.5bb, SB 4-bets to 17.25bb, BTN goes all-in · Small blind to act

4-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 218.73bbYour cards?
17.25bb
1bb
199.84bb

Tap your two cards.

Small blind's range

350 of 1,326 combos get here
Fold 81.2%Call 18.8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when BTN limps, SB isolates to 2.5bb, BTN 3-bets to 7.5bb, SB 4-bets to 17.25bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 200bb?

BTN limps, SB isolates to 2.5bb, BTN 3-bets to 7.5bb, SB 4-bets to 17.25bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 200bb: the small blind (SB) folds 81.2% and calls 18.8%. Always call: KK+, AKs. Mixed: 55-QQ, AQs, A9s-ATs, A6s-A7s, K8s-K9s, QTs, 98s, 54s, AQo+, ATo.

Always fold
AJs, A3s-A5s, KTs+, K5s-K7s, QJs, Q9s, J9s+, J7s, J5s, T7s+, 97s, 86s+, 76s, 64s+, AJo, KQo, KTo, QJo, JTo
Always call
KK+, AKs
Mixed
55-QQ, AQs, A9s-ATs, A6s-A7s, K8s-K9s, QTs, 98s, 54s, AQo+, ATo
Settings: 4-max · 200bb · 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, 200bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.