PokerSolver
PokerSolver/6-max · 40bb · 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) · 40bb · BTN opens 2.5bb · Big blind to act

6-max · 40bb · 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 45.7%Call 34.8%Raise 5/7.5bb 19.5%
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 40bb?

BTN opens 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 40bb: the big blind (BB) folds 45.7%, calls 34.8% and raises 5/7.5bb 19.5%. Always call: 22-55, A2s-A9s, K2s-KTs, Q2s+, J8s+, J6s, J2s, T8s+, T5s-T6s, 98s, 96s, 85s+, 74s+, 65s, 52s+, 42s+, A8o, K8o-KTo, Q9o. Always raise 5/7.5bb: 77+, ATs+, KQs, ATo+, A6o. Mixed: 66, KJs, J7s, J3s-J5s, T7s, T2s-T4s, 97s, 92s-95s, 84s, 73s, 63s-64s, 32s, A9o, A7o, A2o-A5o, KJo+, K5o-K7o, QTo+, Q7o-Q8o, J8o+, T7o+, 97o+, 76o, 65o.

Always fold
82s-83s, 72s, 62s, K2o-K4o, Q2o-Q6o, J2o-J7o, T2o-T6o, 92o-96o, 82o+, 72o-75o, 62o-64o, 52o+, 42o+, 32o
Always call
22-55, A2s-A9s, K2s-KTs, Q2s+, J8s+, J6s, J2s, T8s+, T5s-T6s, 98s, 96s, 85s+, 74s+, 65s, 52s+, 42s+, A8o, K8o-KTo, Q9o
Always raise 5/7.5bb
77+, ATs+, KQs, ATo+, A6o
Mixed
66, KJs, J7s, J3s-J5s, T7s, T2s-T4s, 97s, 92s-95s, 84s, 73s, 63s-64s, 32s, A9o, A7o, A2o-A5o, KJo+, K5o-K7o, QTo+, Q7o-Q8o, J8o+, T7o+, 97o+, 76o, 65o
Settings: 6-max · 40bb · 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, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.