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

BB vs CO all-in

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

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differCOBTNSBBB

Pot 112.48bbYour cards?

11.5bb

99.84bb

0.5bb

Tap your two cards.

Big blind's range

288 of 1,326 combos get here

Fold 82%Call 18%

Tap a hand, or type one above, to see its exact mix.

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

CO limps, BB isolates to 2.5bb, CO 3-bets to 5bb, BB 4-bets to 11.5bb, CO goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 82% and calls 18%. Always call: KK+, AKs. Mixed: JJ-QQ, 55-99, AQs, A9s, A4s, A2s, KQs, T8s, 98s, 76s, ATo.

Always fold: ATs-AJs, A7s-A8s, A5s, A3s, KTs-KJs, K6s-K8s, K2s, QJs, J9s, 75s, 64s+, 54s, AKo, AJo, KQo
Always call: KK+, AKs
Mixed: JJ-QQ, 55-99, AQs, A9s, A4s, A2s, KQs, T8s, 98s, 76s, ATo

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.