PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN all-in

BB vs BTN all-in

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · BTN limps, BB isolates to 3bb, BTN 3-bets to 9bb, BB 4-bets to 20.7bb, BTN goes all-in · Big blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 101.84bbYour cards?
20.7bb
79.84bb
0.5bb

Tap your two cards.

Big blind's range

308 of 1,326 combos get here
Fold 56.5%Call 43.5%
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 3bb, BTN 3-bets to 9bb, BB 4-bets to 20.7bb, BTN goes all-in in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

BTN limps, BB isolates to 3bb, BTN 3-bets to 9bb, BB 4-bets to 20.7bb, BTN goes all-in in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 56.5% and calls 43.5%. Always call: 88+, AJs-AQs, AKo. Mixed: 55-77, AKs, A8s-ATs, A3s-A6s, KQs, K9s-KTs, K5s-K7s, Q9s+, Q7s, J9s+, T9s, 86s, 76s, 65s, ATo-AQo.

Always fold
A7s, KJs, K8s, K3s, J8s, T8s, 53s, 43s, KQo, JTo
Always call
88+, AJs-AQs, AKo
Mixed
55-77, AKs, A8s-ATs, A3s-A6s, KQs, K9s-KTs, K5s-K7s, Q9s+, Q7s, J9s+, T9s, 86s, 76s, 65s, ATo-AQo
Settings: 5-max · 80bb · 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, 80bb stacks, 5% rake capped at 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.