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

BB vs BTN call

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO opens 3bb, BTN calls · 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 8.14bbYour cards?
1bb
3bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 79.7%Call 9.8%Raise 6/9bb 10.5%
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, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 150bb?

CO opens 3bb, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 150bb: the big blind (BB) folds 79.7%, calls 9.8% and raises 6/9bb 10.5%. Always call: 44, 22, A5s, T8s. Always raise 6/9bb: JJ+, AJs+, KJs+, QJs, 98s, AKo. Mixed: 55-TT, 33, A6s-ATs, A2s-A4s, K5s-KTs, K3s, Q8s-QTs, J7s+, T9s, T7s, 97s, 86s+, 75s+, 64s+, 53s+, AJo-AQo, KJo+, QJo, 65o.

Always fold
K4s, K2s, Q2s-Q7s, J2s-J6s, T2s-T6s, 92s-96s, 82s-85s, 72s-74s, 62s-63s, 52s, 42s+, 32s, A2o-ATo, K2o-KTo, Q2o-QTo, J2o+, T2o+, 92o+, 82o+, 72o+, 62o-64o, 52o+, 42o+, 32o
Always call
44, 22, A5s, T8s
Always raise 6/9bb
JJ+, AJs+, KJs+, QJs, 98s, AKo
Mixed
55-TT, 33, A6s-ATs, A2s-A4s, K5s-KTs, K3s, Q8s-QTs, J7s+, T9s, T7s, 97s, 86s+, 75s+, 64s+, 53s+, AJo-AQo, KJo+, QJo, 65o
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.