PokerSolver
PokerSolver/6-max · 250bb · 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) · 250bb · CO limps, SB isolates to 3bb · Big blind to act

6-max · 250bb · 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 82.2%Call 12.6%Raise 6/9bb 5.2%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO limps, SB isolates to 3bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 250bb?

CO limps, SB isolates to 3bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 250bb: the big blind (BB) folds 82.2%, calls 12.6% and raises 6/9bb 5.2%. Always call: KK, A9s-ATs, JTs, AKo. Always raise 6/9bb: AA. Mixed: 22-QQ, AJs+, A2s-A8s, K4s+, Q9s+, Q5s, J9s, T7s+, 97s+, 86s+, 75s, 65s, 53s+, ATo-AQo, KQo, QTo+, JTo.

Always fold
K2s-K3s, Q6s-Q8s, Q2s-Q4s, J2s-J8s, T2s-T6s, 92s-96s, 82s-85s, 76s, 72s-74s, 62s-64s, 52s, 42s+, 32s, A2o-A9o, K2o-KJo, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
KK, A9s-ATs, JTs, AKo
Always raise 6/9bb
AA
Mixed
22-QQ, AJs+, A2s-A8s, K4s+, Q9s+, Q5s, J9s, T7s+, 97s+, 86s+, 75s, 65s, 53s+, ATo-AQo, KQo, QTo+, JTo
Settings: 6-max · 250bb · 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, 250bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 29.27). 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.