PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB call

BB vs SB call

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · BTN opens 2.5bb, SB calls · Big blind to act

4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 6.64bbYour cards?
1bb
2.5bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 56.5%Call 28.1%Raise 5/7.5bb 15.4%
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 2.5bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

BTN opens 2.5bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 56.5%, calls 28.1% and raises 5/7.5bb 15.4%. Always call: 22-44, A4s, K7s-K8s, K2s-K4s, Q7s, Q2s-Q4s, J7s-J8s, J5s, 96s, 85s, 76s, 65s, 63s, 42s, A8o, KTo, QTo, JTo, 76o, 65o. Always raise 5/7.5bb: 99+, AJs+, KQs, KTs, Q9s, JTs, AQo+, KQo. Mixed: 55-88, A5s-ATs, A2s-A3s, KJs, K9s, K5s-K6s, QTs+, Q8s, Q5s-Q6s, J9s, J6s, J4s, T6s+, T2s, 97s+, 94s-95s, 86s+, 83s-84s, 73s-75s, 64s, 62s, 52s+, 43s, 32s, A9o-AJo, A4o-A7o, KJo, K9o, QJo, Q9o, J9o, T8o+, 97o+, 87o, 64o, 54o.

Always fold
J2s-J3s, T3s-T5s, 92s-93s, 82s, 72s, A2o-A3o, K2o-K8o, Q2o-Q8o, J2o-J8o, T2o-T7o, 92o-96o, 82o-86o, 72o-75o, 62o-63o, 52o-53o, 42o+, 32o
Always call
22-44, A4s, K7s-K8s, K2s-K4s, Q7s, Q2s-Q4s, J7s-J8s, J5s, 96s, 85s, 76s, 65s, 63s, 42s, A8o, KTo, QTo, JTo, 76o, 65o
Always raise 5/7.5bb
99+, AJs+, KQs, KTs, Q9s, JTs, AQo+, KQo
Mixed
55-88, A5s-ATs, A2s-A3s, KJs, K9s, K5s-K6s, QTs+, Q8s, Q5s-Q6s, J9s, J6s, J4s, T6s+, T2s, 97s+, 94s-95s, 86s+, 83s-84s, 73s-75s, 64s, 62s, 52s+, 43s, 32s, A9o-AJo, A4o-A7o, KJo, K9o, QJo, Q9o, J9o, T8o+, 97o+, 87o, 64o, 54o
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.