PokerSolver
PokerSolver/5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BTN vs CO open 3bb

BTN vs CO open 3bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO opens 3bb · Button to act

5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.3bbYour cards?
0.5bb
1bb
3bb

Tap your two cards.

Button's range

1,326 of 1,326 combos get here
Fold 83.2%Call 1.1%Raise 6/9bb 15.6%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the button (BTN) when CO opens 3bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

CO opens 3bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the button (BTN) folds 83.2%, calls 1.1% and raises 6/9bb 15.6%. Always raise 6/9bb: TT+, 88, AJs+, A7s-A8s, A3s-A5s, KTs+, AQo+, ATo, KQo. Mixed: 99, 55-77, A9s-ATs, A6s, A2s, K5s-K9s, QTs+, JTs, T9s, 76s, 65s, AJo, KJo, QJo.

Always fold
22-44, K2s-K4s, Q2s-Q9s, J2s-J9s, T2s-T8s, 92s+, 82s+, 72s-75s, 62s-64s, 52s+, 42s+, 32s, A2o-A9o, K2o-KTo, Q2o-QTo, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
No hand plays this every time
Always raise 6/9bb
TT+, 88, AJs+, A7s-A8s, A3s-A5s, KTs+, AQo+, ATo, KQo
Mixed
99, 55-77, A9s-ATs, A6s, A2s, K5s-K9s, QTs+, JTs, T9s, 76s, 65s, AJo, KJo, QJo
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.