PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN open 3bb

BB vs BTN open 3bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · BTN opens 3bb · Big blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 5.14bbYour cards?
1bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 56.1%Call 27.9%Raise 6/9bb 16%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

BTN opens 3bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 56.1%, calls 27.9% and raises 6/9bb 16%. Always call: 99, 22-44, A6s-A9s, K8s-K9s, K6s, K2s-K3s, Q2s-Q8s, J9s, J6s, J3s-J4s, 85s-86s, 74s, 63s-64s, 53s, 43s, A6o-A9o, A4o, KJo, K9o, Q9o-QTo. Always raise 6/9bb: TT+, 66, ATs+, A4s-A5s, KTs+, QJs, AQo+. Mixed: 77-88, 55, A2s-A3s, K7s, K4s-K5s, Q9s-QTs, JTs, J7s-J8s, J5s, T4s+, 95s+, 87s, 75s+, 65s, 54s, ATo-AJo, A5o, A3o, KQo, KTo, K8o, QJo, J9o+, T8o+, 76o.

Always fold
J2s, T2s-T3s, 92s-94s, 82s-84s, 72s-73s, 62s, 52s, 42s, 32s, A2o, K2o-K7o, Q2o-Q8o, J2o-J8o, T2o-T7o, 92o+, 82o+, 72o-75o, 62o+, 52o+, 42o+, 32o
Always call
99, 22-44, A6s-A9s, K8s-K9s, K6s, K2s-K3s, Q2s-Q8s, J9s, J6s, J3s-J4s, 85s-86s, 74s, 63s-64s, 53s, 43s, A6o-A9o, A4o, KJo, K9o, Q9o-QTo
Always raise 6/9bb
TT+, 66, ATs+, A4s-A5s, KTs+, QJs, AQo+
Mixed
77-88, 55, A2s-A3s, K7s, K4s-K5s, Q9s-QTs, JTs, J7s-J8s, J5s, T4s+, 95s+, 87s, 75s+, 65s, 54s, ATo-AJo, A5o, A3o, KQo, KTo, K8o, QJo, J9o+, T8o+, 76o
Settings: 4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.