PokerSolver
PokerSolver/4-max · 80bb · 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) · 80bb · 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 · 80bb · 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 21.7%Call 59.8%Raise 5/7.5bb 18.5%
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 80bb?

SB opens 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 21.7%, calls 59.8% and raises 5/7.5bb 18.5%. Always call: 66-77, 44, 22, A6s-A8s, A3s, K7s-K8s, K5s, K2s-K3s, Q4s-Q9s, Q2s, J2s-J9s, T6s-T7s, T4s, T2s, 93s-96s, 85s, 82s-83s, 72s-75s, 62s-64s, 52s-53s, 42s+, 32s, A7o-A9o, A5o, K6o-KJo, Q8o+, Q6o, JTo, J8o, T7o, 97o+, 87o, 75o+, 65o, 53o+. Always raise 5/7.5bb: TT+, AJs+, A4s, KQs, AQo+, A2o. Mixed: 88-99, 55, 33, A9s-ATs, A5s, A2s, K9s-KJs, K6s, K4s, QTs+, Q3s, JTs, T8s+, T5s, T3s, 97s+, 92s, 86s+, 84s, 76s, 65s, 54s, ATo-AJo, A6o, A3o-A4o, KQo, K2o-K5o, Q7o, Q2o-Q5o, J9o, J3o-J7o, T8o+, T5o-T6o, 96o, 85o-86o, 64o.

Always fold
J2o, T2o-T4o, 92o-95o, 82o-84o, 72o-74o, 62o-63o, 52o, 42o+, 32o
Always call
66-77, 44, 22, A6s-A8s, A3s, K7s-K8s, K5s, K2s-K3s, Q4s-Q9s, Q2s, J2s-J9s, T6s-T7s, T4s, T2s, 93s-96s, 85s, 82s-83s, 72s-75s, 62s-64s, 52s-53s, 42s+, 32s, A7o-A9o, A5o, K6o-KJo, Q8o+, Q6o, JTo, J8o, T7o, 97o+, 87o, 75o+, 65o, 53o+
Always raise 5/7.5bb
TT+, AJs+, A4s, KQs, AQo+, A2o
Mixed
88-99, 55, 33, A9s-ATs, A5s, A2s, K9s-KJs, K6s, K4s, QTs+, Q3s, JTs, T8s+, T5s, T3s, 97s+, 92s, 86s+, 84s, 76s, 65s, 54s, ATo-AJo, A6o, A3o-A4o, KQo, K2o-K5o, Q7o, Q2o-Q5o, J9o, J3o-J7o, T8o+, T5o-T6o, 96o, 85o-86o, 64o
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.