PokerSolver
PokerSolver/4-max · 100bb · 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) · 100bb · CO opens 2bb · Big blind to act

4-max · 100bb · 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 30.4%Call 59.8%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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 30.4%, calls 59.8% and raises 4/6bb 9.8%. Always call: 66, 22-44, ATs, A6s, A2s, K7s, K2s-K5s, Q2s-Q7s, J2s-J6s, T2s-T6s, 92s+, 83s-85s, 72s-74s, 62s-63s, 52s-53s, 42s+, A2o-AJo, K4o+, Q6o+, J8o+, T7o+, 97o+, 86o+, 75o+, 65o, 54o. Always raise 4/6bb: TT+, AKs, KTs, QJs, AKo. Mixed: 77-99, 55, AJs-AQs, A7s-A9s, A3s-A5s, KJs+, K8s-K9s, K6s, Q8s-QTs, J7s+, T7s+, 86s+, 82s, 75s+, 64s+, 54s, 32s, AQo, K3o, Q4o-Q5o, J7o, 85o, 64o.

Always fold
K2o, Q2o-Q3o, J2o-J6o, T2o-T6o, 92o-96o, 82o-84o, 72o-74o, 62o-63o, 52o-53o, 42o+, 32o
Always call
66, 22-44, ATs, A6s, A2s, K7s, K2s-K5s, Q2s-Q7s, J2s-J6s, T2s-T6s, 92s+, 83s-85s, 72s-74s, 62s-63s, 52s-53s, 42s+, A2o-AJo, K4o+, Q6o+, J8o+, T7o+, 97o+, 86o+, 75o+, 65o, 54o
Always raise 4/6bb
TT+, AKs, KTs, QJs, AKo
Mixed
77-99, 55, AJs-AQs, A7s-A9s, A3s-A5s, KJs+, K8s-K9s, K6s, Q8s-QTs, J7s+, T7s+, 86s+, 82s, 75s+, 64s+, 54s, 32s, AQo, K3o, Q4o-Q5o, J7o, 85o, 64o
Settings: 4-max · 100bb · 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, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.