PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN open 2.5bb

BB vs BTN open 2.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · BTN opens 2.5bb · Big blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 4.8bbYour cards?
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 42.2%Call 41.2%Raise 5/7.5bb 16.7%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

BTN opens 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 42.2%, calls 41.2% and raises 5/7.5bb 16.7%. Always call: 88, 22-44, A8s-A9s, K8s-K9s, K2s-K3s, Q9s, Q2s-Q6s, J9s, J2s-J6s, T2s-T4s, 93s-94s, 86s, 84s, 73s-75s, 63s, 54s, 52s, 42s, A6o-ATo, A2o-A3o, K7o-KJo, Q8o, J8o, 98o. Always raise 5/7.5bb: TT+, ATs+, A3s-A5s, KQs, QJs, T8s+, 97s, 76s, AQo+. Mixed: 99, 55-77, A6s-A7s, A2s, KTs-KJs, K4s-K7s, QTs, Q7s-Q8s, JTs, J7s-J8s, T5s-T7s, 98s, 95s-96s, 87s, 85s, 64s+, 62s, 53s, 43s, 32s, AJo, A4o-A5o, KQo, K5o-K6o, Q9o+, Q6o-Q7o, J9o+, T7o+, 97o, 87o, 76o, 65o, 54o.

Always fold
92s, 82s-83s, 72s, K2o-K4o, Q2o-Q5o, J2o-J7o, T2o-T6o, 92o-96o, 82o-86o, 72o-75o, 62o-64o, 52o-53o, 42o+, 32o
Always call
88, 22-44, A8s-A9s, K8s-K9s, K2s-K3s, Q9s, Q2s-Q6s, J9s, J2s-J6s, T2s-T4s, 93s-94s, 86s, 84s, 73s-75s, 63s, 54s, 52s, 42s, A6o-ATo, A2o-A3o, K7o-KJo, Q8o, J8o, 98o
Always raise 5/7.5bb
TT+, ATs+, A3s-A5s, KQs, QJs, T8s+, 97s, 76s, AQo+
Mixed
99, 55-77, A6s-A7s, A2s, KTs-KJs, K4s-K7s, QTs, Q7s-Q8s, JTs, J7s-J8s, T5s-T7s, 98s, 95s-96s, 87s, 85s, 64s+, 62s, 53s, 43s, 32s, AJo, A4o-A5o, KQo, K5o-K6o, Q9o+, Q6o-Q7o, J9o+, T7o+, 97o, 87o, 76o, 65o, 54o
Settings: 5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.