PokerSolver/5-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO open 2.5bb

BB vs CO open 2.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO 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

5-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differHJCOBTNSBBB

Pot 4.8bbYour cards?

1bb

2.5bb

0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here

Fold 57.5%Call 32.6%Raise 5/7.5bb 9.9%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO opens 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 250bb?

CO opens 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 250bb: the big blind (BB) folds 57.5%, calls 32.6% and raises 5/7.5bb 9.9%. Always call: 22-33, A2s, K8s, K2s-K5s, Q2s-Q9s, J3s-J8s, T5s-T7s, 95s+, 87s, 84s-85s, 74s-75s, 63s-64s, 52s, 43s, A7o-AQo, A5o, K9o+, QTo+, T9o. Always raise 5/7.5bb: JJ+, AJs+, A7s-A8s, A5s, KTs+, QJs, JTs. Mixed: 44-TT, A9s-ATs, A6s, A3s-A4s, K9s, K6s-K7s, QTs, J9s, J2s, T8s+, T4s, 86s, 76s, 65s, 53s+, AKo, A4o, Q9o, J9o+, 98o, 87o, 65o.

Always fold: T2s-T3s, 92s-94s, 82s-83s, 72s-73s, 62s, 42s, 32s, A6o, A2o-A3o, K2o-K8o, Q2o-Q8o, J2o-J8o, T2o-T8o, 92o-97o, 82o-86o, 72o+, 62o-64o, 52o+, 42o+, 32o
Always call: 22-33, A2s, K8s, K2s-K5s, Q2s-Q9s, J3s-J8s, T5s-T7s, 95s+, 87s, 84s-85s, 74s-75s, 63s-64s, 52s, 43s, A7o-AQo, A5o, K9o+, QTo+, T9o
Always raise 5/7.5bb: JJ+, AJs+, A7s-A8s, A5s, KTs+, QJs, JTs
Mixed: 44-TT, A9s-ATs, A6s, A3s-A4s, K9s, K6s-K7s, QTs, J9s, J2s, T8s+, T4s, 86s, 76s, 65s, 53s+, AKo, A4o, Q9o, J9o+, 98o, 87o, 65o

Settings: 5-max · 250bb · 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, 250bb stacks, 5% rake capped at 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.