PokerSolver
PokerSolver/6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN open 3bb

BB vs BTN open 3bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · BTN opens 3bb · Big blind to act

6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.46bbYour cards?
1bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 52%Call 29.3%Raise 6bb 6.2%All-in 19.84bb 12.5%
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 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

BTN opens 3bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the big blind (BB) folds 52%, calls 29.3%, raises 6bb 6.2% and goes all-in 19.84bb 12.5%. Always call: A6s, A2s-A3s, K8s-K9s, K2s-K6s, Q2s-Q9s, J9s, J4s-J7s, T6s-T7s, 96s-97s, 85s+, 74s+, 63s+, 53s+, 43s, A7o-A8o, A5o, K7o-KJo, Q8o+, J9o+, T9o. Always raise 6bb: JJ+, AKs. Always all-in 19.84bb: 22-99, ATs, KQs, K7s, QTs+, JTs, A9o-AJo, KQo. Mixed: TT, AJs-AQs, A7s-A9s, A4s-A5s, KTs-KJs, J8s, J3s, T8s+, T4s-T5s, 98s, 95s, 84s, 52s, AQo+, A6o, A2o-A4o, K5o-K6o, Q7o, Q5o, T7o-T8o.

Always fold
J2s, T2s-T3s, 92s-94s, 82s-83s, 72s-73s, 62s, 42s, 32s, K2o-K4o, Q6o, Q2o-Q4o, J2o-J8o, T2o-T6o, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
A6s, A2s-A3s, K8s-K9s, K2s-K6s, Q2s-Q9s, J9s, J4s-J7s, T6s-T7s, 96s-97s, 85s+, 74s+, 63s+, 53s+, 43s, A7o-A8o, A5o, K7o-KJo, Q8o+, J9o+, T9o
Always raise 6bb
JJ+, AKs
Always all-in 19.84bb
22-99, ATs, KQs, K7s, QTs+, JTs, A9o-AJo, KQo
Mixed
TT, AJs-AQs, A7s-A9s, A4s-A5s, KTs-KJs, J8s, J3s, T8s+, T4s-T5s, 98s, 95s, 84s, 52s, AQo+, A6o, A2o-A4o, K5o-K6o, Q7o, Q5o, T7o-T8o
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.