PokerSolver
PokerSolver/6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN open 2.5bb

BB vs BTN open 2.5bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · BTN opens 2.5bb · Big blind to act

6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 4.96bbYour cards?
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 40.6%Call 41%Raise 5/7.5bb 18.4%
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 in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

BTN opens 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the big blind (BB) folds 40.6%, calls 41% and raises 5/7.5bb 18.4%. Always call: A6s, A2s-A3s, K8s-K9s, K2s-K6s, Q2s-Q9s, J2s-J9s, T4s-T7s, T2s, 94s+, 84s+, 73s+, 62s+, 52s+, 42s+, 32s, A8o, A4o-A5o, K6o-KTo, Q8o+, J8o+, T8o+, 76o. Always raise 5/7.5bb: 44+, A9s+, A7s, KQs, QTs+, ATo+, A2o, KQo. Mixed: 22-33, A8s, A4s-A5s, KTs-KJs, K7s, JTs, T8s+, T3s, 93s, A9o, A6o-A7o, A3o, KJo, K4o-K5o, Q5o-Q7o, T7o, 98o, 87o, 65o, 54o.

Always fold
92s, 82s-83s, 72s, K2o-K3o, Q2o-Q4o, J2o-J7o, T2o-T6o, 92o-97o, 82o-86o, 72o-75o, 62o-64o, 52o-53o, 42o+, 32o
Always call
A6s, A2s-A3s, K8s-K9s, K2s-K6s, Q2s-Q9s, J2s-J9s, T4s-T7s, T2s, 94s+, 84s+, 73s+, 62s+, 52s+, 42s+, 32s, A8o, A4o-A5o, K6o-KTo, Q8o+, J8o+, T8o+, 76o
Always raise 5/7.5bb
44+, A9s+, A7s, KQs, QTs+, ATo+, A2o, KQo
Mixed
22-33, A8s, A4s-A5s, KTs-KJs, K7s, JTs, T8s+, T3s, 93s, A9o, A6o-A7o, A3o, KJo, K4o-K5o, Q5o-Q7o, T7o, 98o, 87o, 65o, 54o
Settings: 6-max · 20bb · 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, 20bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.9). 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.