PokerSolver
PokerSolver/4-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs CO open 2bb

BB vs CO open 2bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO opens 2bb · Big blind to act

4-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 4.14bbYour cards?
1bb
2bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 29%Call 62.9%Raise 4/6bb 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 opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 150bb?

CO opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 150bb: the big blind (BB) folds 29%, calls 62.9% and raises 4/6bb 8.1%. Always call: 77, 22-44, A9s, A2s, K2s-K6s, Q2s-Q8s, J2s-J7s, T2s-T6s, 92s+, 82s-85s, 73s-75s, 62s-64s, 52s+, 42s, 32s, A2o-AQo, K4o+, Q6o+, J8o+, T7o+, 97o+, 86o+, 75o+, 64o+, 54o. Always raise 4/6bb: QQ+, AQs+, QTs. Mixed: 88-JJ, 55-66, ATs-AJs, A3s-A8s, K7s+, QJs, Q9s, J8s+, T7s+, 86s+, 76s, 72s, 65s, 43s, AKo, K3o, Q4o-Q5o, J7o, 96o, 53o.

Always fold
K2o, Q2o-Q3o, J2o-J6o, T2o-T6o, 92o-95o, 82o-85o, 72o-74o, 62o-63o, 52o, 42o+, 32o
Always call
77, 22-44, A9s, A2s, K2s-K6s, Q2s-Q8s, J2s-J7s, T2s-T6s, 92s+, 82s-85s, 73s-75s, 62s-64s, 52s+, 42s, 32s, A2o-AQo, K4o+, Q6o+, J8o+, T7o+, 97o+, 86o+, 75o+, 64o+, 54o
Always raise 4/6bb
QQ+, AQs+, QTs
Mixed
88-JJ, 55-66, ATs-AJs, A3s-A8s, K7s+, QJs, Q9s, J8s+, T7s+, 86s+, 76s, 72s, 65s, 43s, AKo, K3o, Q4o-Q5o, J7o, 96o, 53o
Settings: 4-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 150bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.5). 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.