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

BB vs BTN iso raise 2.5bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 40bb · CO limps, BTN isolates to 2.5bb · Big blind to act

6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.96bbYour cards?
1bb
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 73%Call 14.3%Raise 5/7.5bb 12.7%
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 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 40bb?

CO limps, BTN isolates to 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 40bb: the big blind (BB) folds 73%, calls 14.3% and raises 5/7.5bb 12.7%. Always call: 22-66, A7s-A8s, A5s, A2s, KTs, Q4s, 86s+, 54s. Always raise 5/7.5bb: 88+, AJs+, AQo+. Mixed: 77, A9s-ATs, A6s, A3s-A4s, KJs+, K3s-K9s, Q6s+, Q2s, J8s+, T7s+, 96s+, 75s+, 65s, 53s, A8o-AJo, A5o, KTo+, QTo+, JTo.

Always fold
K2s, Q5s, Q3s, J2s-J7s, T2s-T6s, 92s-95s, 82s-85s, 72s-74s, 62s-64s, 52s, 42s+, 32s, A6o-A7o, A2o-A4o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-66, A7s-A8s, A5s, A2s, KTs, Q4s, 86s+, 54s
Always raise 5/7.5bb
88+, AJs+, AQo+
Mixed
77, A9s-ATs, A6s, A3s-A4s, KJs+, K3s-K9s, Q6s+, Q2s, J8s+, T7s+, 96s+, 75s+, 65s, 53s, A8o-AJo, A5o, KTo+, QTo+, JTo
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.