PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO open 3bb

BB vs CO open 3bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO opens 3bb · Big blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.3bbYour cards?
1bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 62.6%Call 27%Raise 6/9bb 10.3%
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 3bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

CO opens 3bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 62.6%, calls 27% and raises 6/9bb 10.3%. Always call: 99, 77, 22-44, A6s-ATs, A2s-A4s, K9s-KJs, K2s, Q9s-QTs, Q2s-Q5s, J9s+, T9s, T7s, 97s+, 85s, 74s+, 63s+, 53s+, A9o-AJo, KQo, QTo+. Always raise 6/9bb: JJ+, AQs+, KQs, AKo, A5o. Mixed: TT, 88, 55-66, AJs, A5s, K3s-K8s, QJs, Q6s-Q8s, J4s-J8s, T8s, T6s, 96s, 86s+, 43s, AQo, A7o-A8o, K9o-KJo, J9o+, T9o.

Always fold
J2s-J3s, T2s-T5s, 92s-95s, 82s-84s, 72s-73s, 62s, 52s, 42s, 32s, A6o, A2o-A4o, K2o-K8o, Q2o-Q9o, J2o-J8o, T2o-T8o, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
99, 77, 22-44, A6s-ATs, A2s-A4s, K9s-KJs, K2s, Q9s-QTs, Q2s-Q5s, J9s+, T9s, T7s, 97s+, 85s, 74s+, 63s+, 53s+, A9o-AJo, KQo, QTo+
Always raise 6/9bb
JJ+, AQs+, KQs, AKo, A5o
Mixed
TT, 88, 55-66, AJs, A5s, K3s-K8s, QJs, Q6s-Q8s, J4s-J8s, T8s, T6s, 96s, 86s+, 43s, AQo, A7o-A8o, K9o-KJo, J9o+, T9o
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.