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 · CO limps, SB isolates to 2.5bb · Big blind to act

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
Tournament
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 77.8%Call 14.1%Raise 5/7.5bb 8.1%
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, SB isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

CO 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 77.8%, calls 14.1% and raises 5/7.5bb 8.1%. Always call: 22-99, AJs, A8s-A9s, KTs, T9s, 87s, AJo. Always raise 5/7.5bb: QQ+, AKs, AKo. Mixed: TT-JJ, AQs, ATs, A2s-A7s, KJs+, K3s-K9s, Q6s+, Q4s, Q2s, J9s+, T7s-T8s, 96s+, 86s, 75s+, 64s+, 54s, AQo, ATo, A5o, KJo+, QTo, JTo.

Always fold
K2s, Q5s, Q3s, J2s-J8s, T2s-T6s, 92s-95s, 82s-85s, 72s-74s, 62s-63s, 52s-53s, 42s+, 32s, A6o-A9o, A2o-A4o, K2o-KTo, QJo, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-99, AJs, A8s-A9s, KTs, T9s, 87s, AJo
Always raise 5/7.5bb
QQ+, AKs, AKo
Mixed
TT-JJ, AQs, ATs, A2s-A7s, KJs+, K3s-K9s, Q6s+, Q4s, Q2s, J9s+, T7s-T8s, 96s+, 86s, 75s+, 64s+, 54s, AQo, ATo, A5o, KJo+, QTo, JTo
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.

Rake sources for the games it fits: 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.