PokerSolver
PokerSolver/4-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN open 3bb

BB vs BTN open 3bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · BTN opens 3bb · 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 5.14bbYour cards?
1bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 54.2%Call 30.2%Raise 6/9bb 15.6%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN opens 3bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 150bb?

BTN opens 3bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 150bb: the big blind (BB) folds 54.2%, calls 30.2% and raises 6/9bb 15.6%. Always call: 22-33, A6s-A9s, K8s, K2s, QTs, Q8s, Q6s, Q2s-Q4s, J6s-J7s, J3s-J4s, T6s, 97s, 85s-86s, 74s-75s, 63s-64s, 53s, 43s, A7o-AJo, A4o-A5o, K8o-KJo, Q9o, J9o. Always raise 6/9bb: JJ+, 55-66, ATs+, A3s-A5s, KTs+, JTs, T9s, 76s, AQo+. Mixed: 77-TT, 44, A2s, K9s, K3s-K7s, QJs, Q9s, Q7s, Q5s, J8s-J9s, J5s, J2s, T7s-T8s, T4s-T5s, 98s, 95s-96s, 87s, 65s, 54s, A6o, A3o, KQo, QTo+, JTo, T8o+, 98o, 76o.

Always fold
T2s-T3s, 92s-94s, 82s-84s, 72s-73s, 62s, 52s, 42s, 32s, A2o, K2o-K7o, Q2o-Q8o, J2o-J8o, T2o-T7o, 92o-97o, 82o+, 72o-75o, 62o+, 52o+, 42o+, 32o
Always call
22-33, A6s-A9s, K8s, K2s, QTs, Q8s, Q6s, Q2s-Q4s, J6s-J7s, J3s-J4s, T6s, 97s, 85s-86s, 74s-75s, 63s-64s, 53s, 43s, A7o-AJo, A4o-A5o, K8o-KJo, Q9o, J9o
Always raise 6/9bb
JJ+, 55-66, ATs+, A3s-A5s, KTs+, JTs, T9s, 76s, AQo+
Mixed
77-TT, 44, A2s, K9s, K3s-K7s, QJs, Q9s, Q7s, Q5s, J8s-J9s, J5s, J2s, T7s-T8s, T4s-T5s, 98s, 95s-96s, 87s, 65s, 54s, A6o, A3o, KQo, QTo+, JTo, T8o+, 98o, 76o
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.