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

BB vs CO open 2bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO opens 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 4.3bbYour cards?
1bb
2bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 28.7%Call 61.5%Raise 4/6bb 9.8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO opens 2bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

CO opens 2bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 28.7%, calls 61.5% and raises 4/6bb 9.8%. Always call: 99, 22-44, A9s-ATs, A4s, K9s, K2s-K4s, Q2s-QTs, J8s, J5s-J6s, J2s-J3s, T2s-T6s, 92s-96s, 82s+, 73s-74s, 65s, 62s-63s, 52s, 42s, 32s, A9o-ATo, A2o-A7o, K3o-KJo, Q6o+, J7o-J9o, T7o+, 97o+, 86o+, 76o, 54o. Always raise 4/6bb: TT+, AQs+, A5s, KTs, AKo. Mixed: 55-88, AJs, A6s-A8s, A2s-A3s, KJs+, K5s-K8s, QJs, J9s+, J7s, J4s, T7s+, 97s+, 75s+, 72s, 64s, 53s+, 43s, AJo-AQo, A8o, KQo, K2o, Q4o-Q5o, JTo, J6o, 96o, 75o, 64o+, 53o, 43o.

Always fold
Q2o-Q3o, J2o-J5o, T2o-T6o, 92o-95o, 82o-85o, 72o-74o, 62o-63o, 52o, 42o, 32o
Always call
99, 22-44, A9s-ATs, A4s, K9s, K2s-K4s, Q2s-QTs, J8s, J5s-J6s, J2s-J3s, T2s-T6s, 92s-96s, 82s+, 73s-74s, 65s, 62s-63s, 52s, 42s, 32s, A9o-ATo, A2o-A7o, K3o-KJo, Q6o+, J7o-J9o, T7o+, 97o+, 86o+, 76o, 54o
Always raise 4/6bb
TT+, AQs+, A5s, KTs, AKo
Mixed
55-88, AJs, A6s-A8s, A2s-A3s, KJs+, K5s-K8s, QJs, J9s+, J7s, J4s, T7s+, 97s+, 75s+, 72s, 64s, 53s+, 43s, AJo-AQo, A8o, KQo, K2o, Q4o-Q5o, JTo, J6o, 96o, 75o, 64o+, 53o, 43o
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.