PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB iso raise 2.5bb

BB vs SB iso raise 2.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · BTN limps, SB isolates to 2.5bb · Big blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.3bbYour cards?
1bb
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 66.7%Call 22.3%Raise 5/7.5bb 11%
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, SB isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

BTN limps, SB isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 66.7%, calls 22.3% and raises 5/7.5bb 11%. Always call: 22-88, ATs, A6s-A8s, A3s-A4s, KTs, K8s, K5s-K6s, K2s-K3s, Q8s-QTs, Q6s, J8s, 96s-97s, 87s, 75s, 43s, ATo, QJo. Always raise 5/7.5bb: JJ+, AJs+, 54s, AKo. Mixed: 99-TT, A9s, A5s, A2s, KJs+, K9s, K7s, K4s, QJs, Q7s, Q2s-Q5s, J9s+, J6s-J7s, J4s, T7s+, 98s, 95s, 85s-86s, 76s, 74s, 63s+, 52s-53s, AJo-AQo, A8o-A9o, A4o-A6o, KTo+, QTo, JTo, 65o.

Always fold
J5s, J2s-J3s, T2s-T6s, 92s-94s, 82s-84s, 72s-73s, 62s, 42s, 32s, A7o, A2o-A3o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o-64o, 52o+, 42o+, 32o
Always call
22-88, ATs, A6s-A8s, A3s-A4s, KTs, K8s, K5s-K6s, K2s-K3s, Q8s-QTs, Q6s, J8s, 96s-97s, 87s, 75s, 43s, ATo, QJo
Always raise 5/7.5bb
JJ+, AJs+, 54s, AKo
Mixed
99-TT, A9s, A5s, A2s, KJs+, K9s, K7s, K4s, QJs, Q7s, Q2s-Q5s, J9s+, J6s-J7s, J4s, T7s+, 98s, 95s, 85s-86s, 76s, 74s, 63s+, 52s-53s, AJo-AQo, A8o-A9o, A4o-A6o, KTo+, QTo, JTo, 65o
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.