PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB iso raise 2bb

BB vs SB iso raise 2bb

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 2bb · Big blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 4.8bbYour cards?
1bb
1bb
2bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 67.4%Call 22.2%Raise 4/6bb 10.4%
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, SB isolates to 2bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

CO limps, SB isolates to 2bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 67.4%, calls 22.2% and raises 4/6bb 10.4%. Always call: 22-88, AJs, A8s-A9s, Q4s, 63s. Always raise 4/6bb: JJ+, AQs+, A5s, AQo+. Mixed: 99-TT, ATs, A6s-A7s, A2s-A4s, K2s+, Q5s+, Q2s-Q3s, J6s+, J2s-J4s, T6s+, 97s+, 85s+, 74s+, 64s+, 52s+, 42s+, A8o-AJo, A4o, KTo+, QTo+, JTo, T9o, 76o, 65o.

Always fold
J5s, T2s-T5s, 92s-96s, 82s-84s, 72s-73s, 62s, 32s, A5o-A7o, A2o-A3o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o-T8o, 92o+, 82o+, 72o-75o, 62o-64o, 52o+, 42o+, 32o
Always call
22-88, AJs, A8s-A9s, Q4s, 63s
Always raise 4/6bb
JJ+, AQs+, A5s, AQo+
Mixed
99-TT, ATs, A6s-A7s, A2s-A4s, K2s+, Q5s+, Q2s-Q3s, J6s+, J2s-J4s, T6s+, 97s+, 85s+, 74s+, 64s+, 52s+, 42s+, A8o-AJo, A4o, KTo+, QTo+, JTo, T9o, 76o, 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.