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

BB vs BTN all-in

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · BTN limps, BB isolates to 2.5bb, BTN 3-bets to 5bb, BB 4-bets to 11.5bb, BTN goes all-in · Big blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 112.48bbYour cards?
11.5bb
99.84bb
0.5bb

Tap your two cards.

Big blind's range

332 of 1,326 combos get here
Fold 76.8%Call 23.1%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN limps, BB isolates to 2.5bb, BTN 3-bets to 5bb, BB 4-bets to 11.5bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

BTN limps, BB isolates to 2.5bb, BTN 3-bets to 5bb, BB 4-bets to 11.5bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 76.8% and calls 23.1%. Always call: JJ+, 55, AKs. Mixed: 99-TT, 66, 44, 22, AJs-AQs, A4s, KTs, K6s, Q8s-Q9s, 97s, AQo+.

Always fold
33, A7s-ATs, A5s, KJs+, K2s, QTs+, J8s+, T9s, T6s, 98s, 96s, 85s, 76s, 65s, 43s, KQo, JTo
Always call
JJ+, 55, AKs
Mixed
99-TT, 66, 44, 22, AJs-AQs, A4s, KTs, K6s, Q8s-Q9s, 97s, AQo+
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.