PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB open 2.5bb

BB vs SB open 2.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · SB opens 2.5bb · Big blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 4.3bbYour cards?
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 20.1%Call 62.3%Raise 5/7.5bb 17.6%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

SB opens 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 20.1%, calls 62.3% and raises 5/7.5bb 17.6%. Always call: 55-77, 22-33, A5s-A8s, K5s-K8s, K2s-K3s, QTs, Q2s-Q8s, J2s-J9s, T5s-T7s, T2s-T3s, 92s-97s, 83s-85s, 72s-75s, 62s-64s, 52s+, 42s, A7o-ATo, A5o, K5o+, K3o, Q9o+, Q6o-Q7o, Q4o, J9o+, J7o, T9o, 98o, 86o+, 75o+, 65o, 53o+. Always raise 5/7.5bb: TT+, AJs+, A4s, KQs, AQo+. Mixed: 88-99, 44, A9s-ATs, A2s-A3s, K9s-KJs, K4s, QJs, Q9s, JTs, T8s+, T4s, 98s, 86s+, 82s, 76s, 65s, 43s, 32s, AJo, A6o, A2o-A4o, K4o, K2o, Q8o, Q5o, Q2o-Q3o, J8o, J3o-J6o, T4o-T8o, 96o-97o, 85o, 64o, 43o.

Always fold
J2o, T2o-T3o, 92o-95o, 82o-84o, 72o-74o, 62o-63o, 52o, 42o, 32o
Always call
55-77, 22-33, A5s-A8s, K5s-K8s, K2s-K3s, QTs, Q2s-Q8s, J2s-J9s, T5s-T7s, T2s-T3s, 92s-97s, 83s-85s, 72s-75s, 62s-64s, 52s+, 42s, A7o-ATo, A5o, K5o+, K3o, Q9o+, Q6o-Q7o, Q4o, J9o+, J7o, T9o, 98o, 86o+, 75o+, 65o, 53o+
Always raise 5/7.5bb
TT+, AJs+, A4s, KQs, AQo+
Mixed
88-99, 44, A9s-ATs, A2s-A3s, K9s-KJs, K4s, QJs, Q9s, JTs, T8s+, T4s, 98s, 86s+, 82s, 76s, 65s, 43s, 32s, AJo, A6o, A2o-A4o, K4o, K2o, Q8o, Q5o, Q2o-Q3o, J8o, J3o-J6o, T4o-T8o, 96o-97o, 85o, 64o, 43o
Settings: 5-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.