PokerSolver
PokerSolver/5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB call

BB vs SB call

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO limps, BTN isolates to 2.5bb, SB calls · Big blind to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 7.8bbYour cards?
1bb
1bb
2.5bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 82.3%Call 9.3%Raise 5/7.5bb 8.4%
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, BTN isolates to 2.5bb, SB calls in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO limps, BTN isolates to 2.5bb, SB calls in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the big blind (BB) folds 82.3%, calls 9.3% and raises 5/7.5bb 8.4%. Always call: 55, 33, 76s. Always raise 5/7.5bb: JJ+, AKs, AKo. Mixed: 66-TT, 44, 22, A2s-AQs, K9s+, K6s, K4s, K2s, Q9s+, Q7s, Q5s, J9s+, J4s-J5s, T9s, T6s-T7s, 97s+, 74s-75s, 64s+, 53s+, AJo-AQo, KQo, KTo, QTo+, 98o, 65o.

Always fold
K7s-K8s, K5s, K3s, Q8s, Q6s, Q2s-Q4s, J6s-J8s, J2s-J3s, T8s, T2s-T5s, 92s-96s, 82s+, 72s-73s, 62s-63s, 52s, 42s+, 32s, A2o-ATo, KJo, K2o-K9o, Q2o-Q9o, J2o+, T2o+, 92o-97o, 82o+, 72o+, 62o-64o, 52o+, 42o+, 32o
Always call
55, 33, 76s
Always raise 5/7.5bb
JJ+, AKs, AKo
Mixed
66-TT, 44, 22, A2s-AQs, K9s+, K6s, K4s, K2s, Q9s+, Q7s, Q5s, J9s+, J4s-J5s, T9s, T6s-T7s, 97s+, 74s-75s, 64s+, 53s+, AJo-AQo, KQo, KTo, QTo+, 98o, 65o
Settings: 5-max · 150bb · 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, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). 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.