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

BB vs SB call

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · CO limps, BTN isolates to 2.5bb, SB calls · Big blind to act

6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 7.96bbYour cards?
1bb
1bb
2.5bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 79.4%Call 6.5%Raise 5/7.5bb 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 CO limps, BTN isolates to 2.5bb, SB calls in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

CO limps, BTN isolates to 2.5bb, SB calls in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the big blind (BB) folds 79.4%, calls 6.5% and raises 5/7.5bb 14.1%. Always raise 5/7.5bb: 66+, ATs+, ATo+, A8o. Mixed: 33-55, A4s-A9s, A2s, K9s+, K6s, K2s, Q6s+, J9s+, J7s, T6s+, T2s-T4s, 95s+, 85s+, 82s, 74s+, 65s, 53s, 43s, A9o, A7o, A4o, KJo+, QJo, JTo, 87o.

Always fold
22, A3s, K7s-K8s, K3s-K5s, Q2s-Q5s, J8s, J2s-J6s, T5s, 92s-94s, 83s-84s, 72s-73s, 62s-64s, 54s, 52s, 42s, 32s, A5o-A6o, A2o-A3o, K2o-KTo, Q2o-QTo, J2o-J9o, T2o+, 92o+, 82o-86o, 72o+, 62o+, 52o+, 42o+, 32o
Always call
No hand plays this every time
Always raise 5/7.5bb
66+, ATs+, ATo+, A8o
Mixed
33-55, A4s-A9s, A2s, K9s+, K6s, K2s, Q6s+, J9s+, J7s, T6s+, T2s-T4s, 95s+, 85s+, 82s, 74s+, 65s, 53s, 43s, A9o, A7o, A4o, KJo+, QJo, JTo, 87o
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.