PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN open 2.5bb

BB vs BTN open 2.5bb

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 · 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 4.64bbYour cards?
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 44.3%Call 38.7%Raise 5/7.5bb 17.1%
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 in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

BTN opens 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 44.3%, calls 38.7% and raises 5/7.5bb 17.1%. Always call: 88, 22-44, A8s-A9s, K2s-K4s, Q2s-Q8s, J2s-J8s, T2s-T4s, 94s-95s, 86s, 73s-74s, 63s, 52s-53s, 42s+, A6o-A9o, A2o-A4o, KJo, K8o-K9o, Q8o-Q9o, J9o, T8o, 98o. Always raise 5/7.5bb: 99+, ATs+, A4s-A5s, KJs+, QTs+, JTs, T7s+, 98s, AQo+, KQo. Mixed: 55-77, A6s-A7s, A2s-A3s, K5s-KTs, Q9s, J9s, T5s-T6s, 96s-97s, 92s-93s, 87s, 84s-85s, 75s+, 64s+, 62s, 54s, ATo-AJo, A5o, KTo, K6o-K7o, QTo+, JTo, J8o, T9o, 97o, 87o, 76o, 65o, 54o.

Always fold
82s-83s, 72s, 32s, K2o-K5o, Q2o-Q7o, J2o-J7o, T2o-T7o, 92o-96o, 82o-86o, 72o-75o, 62o-64o, 52o-53o, 42o+, 32o
Always call
88, 22-44, A8s-A9s, K2s-K4s, Q2s-Q8s, J2s-J8s, T2s-T4s, 94s-95s, 86s, 73s-74s, 63s, 52s-53s, 42s+, A6o-A9o, A2o-A4o, KJo, K8o-K9o, Q8o-Q9o, J9o, T8o, 98o
Always raise 5/7.5bb
99+, ATs+, A4s-A5s, KJs+, QTs+, JTs, T7s+, 98s, AQo+, KQo
Mixed
55-77, A6s-A7s, A2s-A3s, K5s-KTs, Q9s, J9s, T5s-T6s, 96s-97s, 92s-93s, 87s, 84s-85s, 75s+, 64s+, 62s, 54s, ATo-AJo, A5o, KTo, K6o-K7o, QTo+, JTo, J8o, T9o, 97o, 87o, 76o, 65o, 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.