PokerSolver
PokerSolver/6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB iso raise 2.5bb

BB vs SB iso raise 2.5bb

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 2.5bb · 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
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 68.3%Call 15.7%Raise 5/7.5bb 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 limps, SB isolates to 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

BTN limps, SB isolates to 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the big blind (BB) folds 68.3%, calls 15.7% and raises 5/7.5bb 16%. Always call: 22, K2s, JTs, T9s, 96s, KTo. Always raise 5/7.5bb: 66-KK, ATs+, A5s, K9s, A9o+. Mixed: AA, 33-55, A6s-A9s, A2s-A4s, KTs+, K3s-K8s, Q6s+, Q4s, J4s-J9s, J2s, T6s-T8s, 97s+, 86s+, 74s+, 64s+, 54s, 43s, A3o-A8o, KJo+, Q9o+, J9o+.

Always fold
Q5s, Q2s-Q3s, J3s, T2s-T5s, 92s-95s, 82s-85s, 72s-73s, 62s-63s, 52s-53s, 42s, 32s, A2o, K2o-K9o, Q2o-Q8o, J2o-J8o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22, K2s, JTs, T9s, 96s, KTo
Always raise 5/7.5bb
66-KK, ATs+, A5s, K9s, A9o+
Mixed
AA, 33-55, A6s-A9s, A2s-A4s, KTs+, K3s-K8s, Q6s+, Q4s, J4s-J9s, J2s, T6s-T8s, 97s+, 86s+, 74s+, 64s+, 54s, 43s, A3o-A8o, KJo+, Q9o+, J9o+
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.