PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BTN vs CO open 2bb

BTN vs CO open 2bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO opens 2bb · Button to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 4.14bbYour cards?
0.5bb
1bb
2bb

Tap your two cards.

Button's range

1,326 of 1,326 combos get here
Fold 79.5%Call 2.7%Raise 4/6bb 17.8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the button (BTN) when CO opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the button (BTN) folds 79.5%, calls 2.7% and raises 4/6bb 17.8%. Always raise 4/6bb: JJ+, 88-99, 55-66, AKs, AJs, A9s, A4s-A5s, K9s+, QJs, Q9s, JTs, T9s, AJo+. Mixed: TT, 77, 22-44, AQs, ATs, A6s-A8s, A2s-A3s, K6s-K8s, QTs, Q8s, J9s, T8s, 97s+, 86s+, 76s, 65s, 54s, ATo, KJo+, QJo, JTo.

Always fold
K2s-K5s, Q2s-Q7s, J2s-J8s, T2s-T7s, 92s-96s, 82s-85s, 72s-75s, 62s-64s, 52s-53s, 42s+, 32s, A2o-A9o, K2o-KTo, Q2o-QTo, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
No hand plays this every time
Always raise 4/6bb
JJ+, 88-99, 55-66, AKs, AJs, A9s, A4s-A5s, K9s+, QJs, Q9s, JTs, T9s, AJo+
Mixed
TT, 77, 22-44, AQs, ATs, A6s-A8s, A2s-A3s, K6s-K8s, QTs, Q8s, J9s, T8s, 97s+, 86s+, 76s, 65s, 54s, ATo, KJo+, QJo, JTo
Settings: 4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.