PokerSolver
PokerSolver/5-max · 100bb · 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) · 100bb · CO opens 2bb · Big blind to act

5-max · 100bb · 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 28.8%Call 61.3%Raise 4/6bb 9.9%
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 100bb?

CO opens 2bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the big blind (BB) folds 28.8%, calls 61.3% and raises 4/6bb 9.9%. Always call: 22-55, A9s, K8s, K6s, K2s-K3s, Q2s-Q9s, J7s, J2s-J5s, T6s-T7s, T4s, T2s, 97s, 92s-95s, 87s, 82s-85s, 73s-75s, 65s, 62s-63s, 52s-53s, 42s+, A2o-AJo, K3o+, Q8o+, Q5o-Q6o, J7o-J9o, T7o+, 97o+, 86o+, 75o+, 64o+. Always raise 4/6bb: JJ+, AQs+, KJs, QJs, AKo. Mixed: 66-TT, ATs-AJs, A2s-A8s, KQs, K9s-KTs, K7s, K4s-K5s, QTs, J8s+, J6s, T8s+, T5s, T3s, 98s, 96s, 86s, 76s, 72s, 64s, 54s, 32s, AQo, K2o, Q7o, Q4o, JTo, 53o+.

Always fold
Q2o-Q3o, J2o-J6o, T2o-T6o, 92o-96o, 82o-85o, 72o-74o, 62o-63o, 52o, 42o+, 32o
Always call
22-55, A9s, K8s, K6s, K2s-K3s, Q2s-Q9s, J7s, J2s-J5s, T6s-T7s, T4s, T2s, 97s, 92s-95s, 87s, 82s-85s, 73s-75s, 65s, 62s-63s, 52s-53s, 42s+, A2o-AJo, K3o+, Q8o+, Q5o-Q6o, J7o-J9o, T7o+, 97o+, 86o+, 75o+, 64o+
Always raise 4/6bb
JJ+, AQs+, KJs, QJs, AKo
Mixed
66-TT, ATs-AJs, A2s-A8s, KQs, K9s-KTs, K7s, K4s-K5s, QTs, J8s+, J6s, T8s+, T5s, T3s, 98s, 96s, 86s, 76s, 72s, 64s, 54s, 32s, AQo, K2o, Q7o, Q4o, JTo, 53o+
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.