PokerSolver
PokerSolver/4-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN open 2.5bb

BB vs BTN open 2.5bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · BTN opens 2.5bb · Big blind to act

4-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 4.64bbYour cards?
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 41.5%Call 41.8%Raise 5/7.5bb 16.7%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN opens 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 200bb?

BTN opens 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 200bb: the big blind (BB) folds 41.5%, calls 41.8% and raises 5/7.5bb 16.7%. Always call: 22, A8s, K8s-K9s, K2s-K4s, Q8s, Q6s, Q2s-Q4s, J7s, J2s-J5s, T2s-T6s, 94s-95s, 84s-86s, 74s-75s, 63s-64s, 52s-53s, 43s, AJo, A2o-A9o, KJo, K6o-K9o, Q8o-Q9o, Q6o, J8o-J9o, T8o+, 97o+, 87o, 76o, 65o. Always raise 5/7.5bb: 99+, 55-77, ATs+, A3s-A7s, KTs+, K7s, QTs+, JTs, T9s, 98s, 54s, AKo. Mixed: 88, 33-44, A9s, A2s, K5s-K6s, Q9s, Q7s, Q5s, J8s-J9s, J6s, T7s-T8s, 96s-97s, 93s, 87s, 76s, 65s, 42s, AQo, ATo, KQo, KTo, K5o, QTo+, JTo, 54o.

Always fold
92s, 82s-83s, 72s-73s, 62s, 32s, K2o-K4o, Q7o, Q2o-Q5o, J2o-J7o, T2o-T7o, 92o-96o, 82o-86o, 72o-75o, 62o-64o, 52o-53o, 42o+, 32o
Always call
22, A8s, K8s-K9s, K2s-K4s, Q8s, Q6s, Q2s-Q4s, J7s, J2s-J5s, T2s-T6s, 94s-95s, 84s-86s, 74s-75s, 63s-64s, 52s-53s, 43s, AJo, A2o-A9o, KJo, K6o-K9o, Q8o-Q9o, Q6o, J8o-J9o, T8o+, 97o+, 87o, 76o, 65o
Always raise 5/7.5bb
99+, 55-77, ATs+, A3s-A7s, KTs+, K7s, QTs+, JTs, T9s, 98s, 54s, AKo
Mixed
88, 33-44, A9s, A2s, K5s-K6s, Q9s, Q7s, Q5s, J8s-J9s, J6s, T7s-T8s, 96s-97s, 93s, 87s, 76s, 65s, 42s, AQo, ATo, KQo, KTo, K5o, QTo+, JTo, 54o
Settings: 4-max · 200bb · 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, 200bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.