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) · 150bb · BTN opens 2.5bb, SB 3-bets to 5bb, BTN goes all-in · Small blind to act
4-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 156.48bbYour cards?
5bb
1bb
149.84bb
Tap your two cards.
Small blind's range
272 of 1,326 combos get hereFold 85%Call 15%
Tap a hand, or type one above, to see its exact mix.
What is the GTO play for the small blind (SB) when BTN opens 2.5bb, SB 3-bets to 5bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 150bb?
BTN opens 2.5bb, SB 3-bets to 5bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 150bb: the small blind (SB) folds 85% and calls 15%. Always call: QQ+, AKs, AKo. Mixed: TT, AQs, AQo.
- Always fold
- JJ, 33-99, A5s-AJs, A2s-A3s, K8s+, QTs+, J9s+, 98s, 76s, 65s, AJo, KJo+
- Always call
- QQ+, AKs, AKo
- Mixed
- TT, AQs, AQo
Settings: 4-max · 150bb · 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, 150bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.5). 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.