PokerSolver
PokerSolver/5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN open 3bb

BB vs BTN open 3bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · BTN opens 3bb · Big blind to act

5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.3bbYour cards?
1bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 53.9%Call 30.6%Raise 6/9bb 15.5%
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 3bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

BTN opens 3bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the big blind (BB) folds 53.9%, calls 30.6% and raises 6/9bb 15.5%. Always call: 88-99, 22-55, A6s-A9s, K7s-K9s, K2s, Q2s-Q9s, J8s+, J2s-J4s, T8s, T4s, 74s, 64s, 53s, 43s, A7o-A9o, A3o, KJo, K8o-K9o, QTo. Always raise 6/9bb: TT+, AJs+, A4s-A5s, KJs+, K5s, QJs, T7s, AQo+. Mixed: 66-77, ATs, A2s-A3s, KTs, K6s, K3s-K4s, QTs, J5s-J7s, T9s, T5s-T6s, 95s+, 85s+, 75s+, 65s, 63s, 54s, 52s, ATo-AJo, A4o-A6o, KQo, KTo, QJo, Q9o, J9o+, T8o+.

Always fold
T2s-T3s, 92s-94s, 82s-84s, 72s-73s, 62s, 42s, 32s, A2o, K2o-K7o, Q2o-Q8o, J2o-J8o, T2o-T7o, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
88-99, 22-55, A6s-A9s, K7s-K9s, K2s, Q2s-Q9s, J8s+, J2s-J4s, T8s, T4s, 74s, 64s, 53s, 43s, A7o-A9o, A3o, KJo, K8o-K9o, QTo
Always raise 6/9bb
TT+, AJs+, A4s-A5s, KJs+, K5s, QJs, T7s, AQo+
Mixed
66-77, ATs, A2s-A3s, KTs, K6s, K3s-K4s, QTs, J5s-J7s, T9s, T5s-T6s, 95s+, 85s+, 75s+, 65s, 63s, 54s, 52s, ATo-AJo, A4o-A6o, KQo, KTo, QJo, Q9o, J9o+, T8o+
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.