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

BTN 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 · Button 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?
0.5bb
1bb
2.5bb

Tap your two cards.

Button's range

1,326 of 1,326 combos get here
Fold 82.3%Call 5.6%Raise 5/7.5bb 12.1%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the button (BTN) 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 button (BTN) folds 82.3%, calls 5.6% and raises 5/7.5bb 12.1%. Always call: 55-66, A8s-AJs, KTs-KJs, QTs+, JTs. Always raise 5/7.5bb: 88+, AQs+, A6s, A3s-A4s, K8s, AQo+, KJo, QJo. Mixed: 77, A7s, A5s, A2s, KQs, K9s, K5s, Q8s, T9s, ATo-AJo, A8o, KQo, KTo, QTo.

Always fold
22-44, K6s-K7s, K2s-K4s, Q9s, Q2s-Q7s, J2s-J9s, T2s-T8s, 92s+, 82s+, 72s+, 62s+, 52s+, 42s+, 32s, A9o, A2o-A7o, K2o-K9o, Q2o-Q9o, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
55-66, A8s-AJs, KTs-KJs, QTs+, JTs
Always raise 5/7.5bb
88+, AQs+, A6s, A3s-A4s, K8s, AQo+, KJo, QJo
Mixed
77, A7s, A5s, A2s, KQs, K9s, K5s, Q8s, T9s, ATo-AJo, A8o, KQo, KTo, QTo
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.