PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN open 2bb

BB vs BTN open 2bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · BTN opens 2bb · Big blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 4.3bbYour cards?
1bb
2bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 20.9%Call 63.5%Raise 4/6bb 15.6%
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 2bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

BTN opens 2bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 20.9%, calls 63.5% and raises 4/6bb 15.6%. Always call: 22-44, A9s, A2s, K8s, K6s, K2s-K4s, Q2s-Q6s, J8s, J6s, J2s-J4s, T2s-T5s, 92s-95s, 82s-84s, 72s-74s, 62s-63s, 52s-53s, 43s, 32s, A6o-A9o, A2o-A4o, K2o-KTo, Q3o-Q9o, J6o-J9o, T6o+, 96o+, 85o+, 75o+, 64o. Always raise 4/6bb: 99+, ATs+, A5s, QTs+, JTs, T9s, AQo+. Mixed: 55-88, A6s-A8s, A3s-A4s, K9s+, K7s, K5s, Q7s-Q9s, J9s, J7s, J5s, T6s-T8s, 96s+, 85s+, 75s+, 64s+, 54s, 42s, ATo-AJo, A5o, KJo+, QTo+, Q2o, JTo, J3o-J5o, 65o, 53o+, 43o.

Always fold
J2o, T2o-T5o, 92o-95o, 82o-84o, 72o-74o, 62o-63o, 52o, 42o, 32o
Always call
22-44, A9s, A2s, K8s, K6s, K2s-K4s, Q2s-Q6s, J8s, J6s, J2s-J4s, T2s-T5s, 92s-95s, 82s-84s, 72s-74s, 62s-63s, 52s-53s, 43s, 32s, A6o-A9o, A2o-A4o, K2o-KTo, Q3o-Q9o, J6o-J9o, T6o+, 96o+, 85o+, 75o+, 64o
Always raise 4/6bb
99+, ATs+, A5s, QTs+, JTs, T9s, AQo+
Mixed
55-88, A6s-A8s, A3s-A4s, K9s+, K7s, K5s, Q7s-Q9s, J9s, J7s, J5s, T6s-T8s, 96s+, 85s+, 75s+, 64s+, 54s, 42s, ATo-AJo, A5o, KJo+, QTo+, Q2o, JTo, J3o-J5o, 65o, 53o+, 43o
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.