PokerSolver
PokerSolver/4-max · 80bb · 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) · 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

4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 101.68bbYour cards?
20.7bb
79.84bb
0.5bb

Tap your two cards.

Big blind's range

418 of 1,326 combos get here
Fold 60.5%Call 39.5%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

BTN limps, BB isolates to 3bb, BTN 3-bets to 9bb, BB 4-bets to 20.7bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 60.5% and calls 39.5%. Always call: JJ+, 88-99, AQs, A6s, QTs, AQo+. Mixed: TT, 66-77, 22, AKs, A9s-AJs, A7s, A5s, A2s-A3s, K6s+, QJs, Q8s, JTs, J8s, T7s+, 86s+, 76s, 65s, 53s, ATo-AJo, A7o, KQo, JTo.

Always fold
44, A8s, K5s, Q9s, J9s, T6s, T3s, 97s+, 54s, 52s, 43s, QJo
Always call
JJ+, 88-99, AQs, A6s, QTs, AQo+
Mixed
TT, 66-77, 22, AKs, A9s-AJs, A7s, A5s, A2s-A3s, K6s+, QJs, Q8s, JTs, J8s, T7s+, 86s+, 76s, 65s, 53s, ATo-AJo, A7o, KQo, JTo
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.