PokerSolver
PokerSolver/5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB call

BB vs SB call

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO limps, BTN isolates to 2.5bb, SB calls · Big blind to act

5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 7.8bbYour cards?
1bb
1bb
2.5bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 84%Call 6.6%Raise 5/7.5bb 9.4%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

CO limps, BTN isolates to 2.5bb, SB calls in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the big blind (BB) folds 84%, calls 6.6% and raises 5/7.5bb 9.4%. Always raise 5/7.5bb: JJ+, AKs, QJs, AKo. Mixed: 22-TT, A2s-AQs, K6s+, Q9s-QTs, Q7s, JTs, J4s-J8s, T6s+, 97s+, 86s, 75s, 63s, 53s+, 42s+, ATo-AQo, KTo+, JTo, T8o.

Always fold
K2s-K5s, Q8s, Q2s-Q6s, J9s, J2s-J3s, T2s-T5s, 92s-96s, 87s, 82s-85s, 76s, 72s-74s, 64s+, 62s, 52s, 32s, A2o-A9o, K2o-K9o, Q2o+, J2o-J9o, T9o, T2o-T7o, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
No hand plays this every time
Always raise 5/7.5bb
JJ+, AKs, QJs, AKo
Mixed
22-TT, A2s-AQs, K6s+, Q9s-QTs, Q7s, JTs, J4s-J8s, T6s+, 97s+, 86s, 75s, 63s, 53s+, 42s+, ATo-AQo, KTo+, JTo, T8o
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.