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 2.5bb, 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 7.14bbYour cards?
1bb
2.5bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 76.7%Call 13.4%Raise 5/7.5bb 9.9%
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 2.5bb, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 150bb?

CO opens 2.5bb, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 150bb: the big blind (BB) folds 76.7%, calls 13.4% and raises 5/7.5bb 9.9%. Always call: 66, 22-44, A9s, A7s, A2s, 64s+, AJo. Always raise 5/7.5bb: JJ+, AJs+, A8s, KJs+, QJs, JTs, AKo. Mixed: 77-TT, 55, ATs, A3s-A6s, K2s-KTs, Q9s-QTs, Q7s, Q5s, Q3s, J8s-J9s, J2s, T5s+, 97s+, 95s, 85s+, 74s+, 53s+, 43s, AQo, ATo, KJo+, QTo+, 87o, 65o, 54o.

Always fold
Q8s, Q6s, Q4s, Q2s, J3s-J7s, T2s-T4s, 96s, 92s-94s, 82s-84s, 72s-73s, 62s-63s, 52s, 42s, 32s, A2o-A9o, K2o-KTo, Q2o-Q9o, J2o+, T2o+, 92o+, 82o-86o, 72o+, 62o-64o, 52o-53o, 42o+, 32o
Always call
66, 22-44, A9s, A7s, A2s, 64s+, AJo
Always raise 5/7.5bb
JJ+, AJs+, A8s, KJs+, QJs, JTs, AKo
Mixed
77-TT, 55, ATs, A3s-A6s, K2s-KTs, Q9s-QTs, Q7s, Q5s, Q3s, J8s-J9s, J2s, T5s+, 97s+, 95s, 85s+, 74s+, 53s+, 43s, AQo, ATo, KJo+, QTo+, 87o, 65o, 54o
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.