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

BB vs SB iso raise 3bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · BTN limps, SB isolates to 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 5.96bbYour cards?
1bb
1bb
3bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 71.2%Call 13.6%Raise 6bb 1.2%All-in 19.84bb 14.1%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN limps, SB isolates to 3bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

BTN limps, SB isolates to 3bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the big blind (BB) folds 71.2%, calls 13.6%, raises 6bb 1.2% and goes all-in 19.84bb 14.1%. Always call: 55, KJs, T9s, 96s+, 86s+, 76s, 65s, 54s, KTo+, QTo+. Always all-in 19.84bb: 66-JJ, AJs-AQs, A6s, A2s-A3s, K8s, QJs, ATo+. Mixed: QQ+, 22-44, AKs, A7s-ATs, A4s-A5s, KQs, K9s-KTs, K3s-K7s, Q6s-QTs, J8s+, T8s, 75s, 64s, A5o-A9o.

Always fold
K2s, Q2s-Q5s, J2s-J7s, T2s-T7s, 92s-95s, 82s-85s, 72s-74s, 62s-63s, 52s-53s, 42s+, 32s, A2o-A4o, K2o-K9o, Q2o-Q9o, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
55, KJs, T9s, 96s+, 86s+, 76s, 65s, 54s, KTo+, QTo+
Always raise 6bb
No hand plays this every time
Always all-in 19.84bb
66-JJ, AJs-AQs, A6s, A2s-A3s, K8s, QJs, ATo+
Mixed
QQ+, 22-44, AKs, A7s-ATs, A4s-A5s, KQs, K9s-KTs, K3s-K7s, Q6s-QTs, J8s+, T8s, 75s, 64s, A5o-A9o
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.