PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB open 2.5bb

BB vs SB open 2.5bb

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

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 4.14bbYour cards?
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 21.6%Call 58.4%Raise 5/7.5bb 19.9%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when SB opens 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

SB opens 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 21.6%, calls 58.4% and raises 5/7.5bb 19.9%. Always call: 66, 22-33, K5s-K8s, K2s, Q2s-Q8s, J7s-J9s, J2s-J5s, T7s, T2s-T5s, 94s-96s, 92s, 84s, 82s, 74s, 72s, 62s-64s, 52s-53s, 42s, 32s, A5o-ATo, K7o-KJo, K4o, Q9o+, J9o+, 98o, 86o+, 76o, 65o, 54o. Always raise 5/7.5bb: TT+, ATs+, A5s, KQs, KTs, QJs, JTs, AQo+. Mixed: 77-99, 44-55, A6s-A9s, A2s-A4s, KJs, K9s, K3s-K4s, Q9s-QTs, J6s, T8s+, T6s, 97s+, 93s, 85s+, 83s, 75s+, 73s, 65s, 54s, 43s, AJo, A2o-A4o, KQo, K5o-K6o, K2o-K3o, Q3o-Q8o, J3o-J8o, T4o+, 96o-97o, 75o, 64o, 53o, 43o.

Always fold
Q2o, J2o, T2o-T3o, 92o-95o, 82o-85o, 72o-74o, 62o-63o, 52o, 42o, 32o
Always call
66, 22-33, K5s-K8s, K2s, Q2s-Q8s, J7s-J9s, J2s-J5s, T7s, T2s-T5s, 94s-96s, 92s, 84s, 82s, 74s, 72s, 62s-64s, 52s-53s, 42s, 32s, A5o-ATo, K7o-KJo, K4o, Q9o+, J9o+, 98o, 86o+, 76o, 65o, 54o
Always raise 5/7.5bb
TT+, ATs+, A5s, KQs, KTs, QJs, JTs, AQo+
Mixed
77-99, 44-55, A6s-A9s, A2s-A4s, KJs, K9s, K3s-K4s, Q9s-QTs, J6s, T8s+, T6s, 97s+, 93s, 85s+, 83s, 75s+, 73s, 65s, 54s, 43s, AJo, A2o-A4o, KQo, K5o-K6o, K2o-K3o, Q3o-Q8o, J3o-J8o, T4o+, 96o-97o, 75o, 64o, 53o, 43o
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.

Rake sources for the games it fits: 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.