PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB call

BB vs SB call

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · BTN opens 2.5bb, SB calls · Big blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 6.64bbYour cards?
1bb
2.5bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 54.5%Call 30.1%Raise 5/7.5bb 15.4%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

BTN opens 2.5bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 54.5%, calls 30.1% and raises 5/7.5bb 15.4%. Always call: 66, 22-33, K6s, K2s-K4s, Q5s-Q6s, Q3s, 96s, 85s, 63s, 53s, A8o, KTo, QJo. Always raise 5/7.5bb: 99+, AJs+, A9s, KQs, KTs, QJs, JTs, AQo+, KQo. Mixed: 77-88, 44-55, ATs, A2s-A8s, KJs, K7s-K9s, K5s, Q7s-QTs, Q4s, Q2s, J7s-J9s, J2s-J5s, T4s+, 97s+, 93s, 86s+, 84s, 74s+, 64s+, 62s, 54s, 52s, 42s+, 32s, A9o-AJo, A4o-A7o, KJo, K9o, K6o, Q9o-QTo, J9o+, T8o+, 97o+, 87o, 75o+, 65o, 54o.

Always fold
J6s, T2s-T3s, 94s-95s, 92s, 82s-83s, 72s-73s, A2o-A3o, K7o-K8o, K2o-K5o, Q2o-Q8o, J2o-J8o, T2o-T7o, 92o-96o, 82o-86o, 72o-74o, 62o-64o, 52o-53o, 42o+, 32o
Always call
66, 22-33, K6s, K2s-K4s, Q5s-Q6s, Q3s, 96s, 85s, 63s, 53s, A8o, KTo, QJo
Always raise 5/7.5bb
99+, AJs+, A9s, KQs, KTs, QJs, JTs, AQo+, KQo
Mixed
77-88, 44-55, ATs, A2s-A8s, KJs, K7s-K9s, K5s, Q7s-QTs, Q4s, Q2s, J7s-J9s, J2s-J5s, T4s+, 97s+, 93s, 86s+, 84s, 74s+, 64s+, 62s, 54s, 52s, 42s+, 32s, A9o-AJo, A4o-A7o, KJo, K9o, K6o, Q9o-QTo, J9o+, T8o+, 97o+, 87o, 75o+, 65o, 54o
Settings: 4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.