PokerSolver
PokerSolver/5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN iso raise 2.5bb

BB vs BTN iso raise 2.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · CO limps, BTN isolates to 2.5bb · Big blind to act

5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.8bbYour cards?
1bb
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 70.2%Call 25.4%Raise 5/7.5bb 4.4%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO limps, BTN isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 200bb?

CO limps, BTN isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 200bb: the big blind (BB) folds 70.2%, calls 25.4% and raises 5/7.5bb 4.4%. Always call: QQ-KK, 44, 22, A8s, A2s-A3s, K8s, K4s, 97s+, 87s, 76s, 65s, AKo, A9o-AJo, KJo, QJo, JTo. Mixed: AA, 55-JJ, 33, A9s+, A4s-A7s, K9s+, K5s-K7s, K2s-K3s, Q3s+, J6s+, T6s+, 96s, 86s, 74s-75s, 63s-64s, 53s+, 43s, AQo, A8o, A5o, KQo, KTo, QTo, T9o, 54o.

Always fold
Q2s, J2s-J5s, T2s-T5s, 92s-95s, 82s-85s, 72s-73s, 62s, 52s, 42s, 32s, A6o-A7o, A2o-A4o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o-T8o, 92o+, 82o+, 72o+, 62o+, 52o-53o, 42o+, 32o
Always call
QQ-KK, 44, 22, A8s, A2s-A3s, K8s, K4s, 97s+, 87s, 76s, 65s, AKo, A9o-AJo, KJo, QJo, JTo
Always raise 5/7.5bb
No hand plays this every time
Mixed
AA, 55-JJ, 33, A9s+, A4s-A7s, K9s+, K5s-K7s, K2s-K3s, Q3s+, J6s+, T6s+, 96s, 86s, 74s-75s, 63s-64s, 53s+, 43s, AQo, A8o, A5o, KQo, KTo, QTo, T9o, 54o
Settings: 5-max · 200bb · 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, 200bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.99). 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.