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 · BTN opens 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 6.8bbYour cards?
1bb
2.5bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 53.3%Call 31%Raise 5/7.5bb 15.7%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN opens 2.5bb, SB calls in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

BTN opens 2.5bb, SB calls in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the big blind (BB) folds 53.3%, calls 31% and raises 5/7.5bb 15.7%. Always call: 22-44, A2s, K8s, K4s-K5s, K2s, Q3s-Q7s, J8s, J4s, 87s, 85s, 62s, A8o, A4o-A6o, KJo, K9o, J9o, 65o. Always raise 5/7.5bb: 99+, ATs+, KQs, KTs, AQo+. Mixed: 55-88, A3s-A9s, KJs, K9s, K6s-K7s, K3s, Q8s+, Q2s, J9s+, J5s-J7s, J2s, T3s+, 94s+, 86s, 74s+, 63s+, 52s+, 43s, 32s, A9o-AJo, A7o, A3o, KQo, KTo, Q9o+, JTo, T9o, 98o, 86o+, 76o, 64o, 54o.

Always fold
J3s, T2s, 92s-93s, 82s-84s, 72s-73s, 42s, A2o, K2o-K8o, Q2o-Q8o, J2o-J8o, T2o-T8o, 92o-97o, 82o-85o, 72o-75o, 62o-63o, 52o-53o, 42o+, 32o
Always call
22-44, A2s, K8s, K4s-K5s, K2s, Q3s-Q7s, J8s, J4s, 87s, 85s, 62s, A8o, A4o-A6o, KJo, K9o, J9o, 65o
Always raise 5/7.5bb
99+, ATs+, KQs, KTs, AQo+
Mixed
55-88, A3s-A9s, KJs, K9s, K6s-K7s, K3s, Q8s+, Q2s, J9s+, J5s-J7s, J2s, T3s+, 94s+, 86s, 74s+, 63s+, 52s+, 43s, 32s, A9o-AJo, A7o, A3o, KQo, KTo, Q9o+, JTo, T9o, 98o, 86o+, 76o, 64o, 54o
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.