PokerSolver
PokerSolver/6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO open 2.5bb

BB vs CO open 2.5bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 40bb · CO opens 2.5bb · Big blind to act

6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 4.96bbYour cards?
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 51.6%Call 34.7%Raise 5/7.5bb 13.7%
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 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 40bb?

CO opens 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 40bb: the big blind (BB) folds 51.6%, calls 34.7% and raises 5/7.5bb 13.7%. Always call: 22-66, A2s-ATs, K2s-KJs, Q2s+, J5s+, J2s-J3s, T7s+, T5s, 95s+, 84s+, 74s+, 63s+, 52s+, 42s+, A9o-ATo, A7o, KTo, QTo, J9o. Always raise 5/7.5bb: 88+, AJs+, AJo+, T8o. Mixed: 77, KQs, J4s, T6s, T3s-T4s, 73s, A8o, A3o-A6o, KJo+, K7o-K9o, QJo, Q8o-Q9o, JTo, T9o, 98o, 87o.

Always fold
T2s, 92s-94s, 82s-83s, 72s, 62s, 32s, A2o, K2o-K6o, Q2o-Q7o, J2o-J8o, T2o-T7o, 92o-97o, 82o-86o, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-66, A2s-ATs, K2s-KJs, Q2s+, J5s+, J2s-J3s, T7s+, T5s, 95s+, 84s+, 74s+, 63s+, 52s+, 42s+, A9o-ATo, A7o, KTo, QTo, J9o
Always raise 5/7.5bb
88+, AJs+, AJo+, T8o
Mixed
77, KQs, J4s, T6s, T3s-T4s, 73s, A8o, A3o-A6o, KJo+, K7o-K9o, QJo, Q8o-Q9o, JTo, T9o, 98o, 87o
Settings: 6-max · 40bb · 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, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.