PokerSolver
PokerSolver/Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/BB vs SB open 2.5bb

BB vs SB open 2.5bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · SB opens 2.5bb · Big blind to act

Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 3.82bbYour cards?
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 34.8%Call 38.3%Raise 5/7.5bb 26.9%
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 Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 80bb?

SB opens 2.5bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 80bb: the big blind (BB) folds 34.8%, calls 38.3% and raises 5/7.5bb 26.9%. Always call: 22-33, K4s, Q2s-Q5s, J2s-J4s, T2s-T5s, 92s, 43s, A5o-A6o, A2o, K4o-K7o, Q6o-Q7o, J7o-J9o, 86o+, 65o. Always raise 5/7.5bb: 88+, A8s+, A5s, KJs+, K9s, Q9s+, JTs, T7s, 97s, 74s, 65s, A9o+, KQo. Mixed: 44-77, A6s-A7s, A2s-A4s, KTs, K5s-K8s, K2s-K3s, Q6s-Q8s, J5s-J9s, T8s+, T6s, 98s, 93s-96s, 82s+, 75s+, 73s, 62s-64s, 52s+, 42s, 32s, A7o-A8o, A3o-A4o, K8o-KJo, K3o, Q8o+, Q5o, JTo, T7o+, 97o+, 76o, 54o.

Always fold
72s, K2o, Q2o-Q4o, J2o-J6o, T2o-T6o, 92o-96o, 82o-85o, 72o-75o, 62o-64o, 52o-53o, 42o+, 32o
Always call
22-33, K4s, Q2s-Q5s, J2s-J4s, T2s-T5s, 92s, 43s, A5o-A6o, A2o, K4o-K7o, Q6o-Q7o, J7o-J9o, 86o+, 65o
Always raise 5/7.5bb
88+, A8s+, A5s, KJs+, K9s, Q9s+, JTs, T7s, 97s, 74s, 65s, A9o+, KQo
Mixed
44-77, A6s-A7s, A2s-A4s, KTs, K5s-K8s, K2s-K3s, Q6s-Q8s, J5s-J9s, T8s+, T6s, 98s, 93s-96s, 82s+, 75s+, 73s, 62s-64s, 52s+, 42s, 32s, A7o-A8o, A3o-A4o, K8o-KJo, K3o, Q8o+, Q5o, JTo, T7o+, 97o+, 76o, 54o
Settings: Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 80bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 22.38). 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.