PokerSolver
PokerSolver/6-max · 20bb · 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) · 20bb · CO limps, BTN isolates to 2.5bb · Big blind to act

6-max · 20bb · 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 70.2%Call 14.9%Raise 5/7.5bb 14.9%
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 20bb?

CO limps, BTN isolates to 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the big blind (BB) folds 70.2%, calls 14.9% and raises 5/7.5bb 14.9%. Always call: 22-33, A3s-A4s, K7s-K8s, T8s, 98s, 96s, 86s+, 75s+, 64s+, 54s, KTo. Always raise 5/7.5bb: 66+, ATs+, A8s, A6s, KJs, QJs, ATo+. Mixed: 44-55, A9s, A7s, A5s, A2s, KQs, K9s-KTs, K4s-K6s, Q6s-QTs, Q2s, J7s+, T9s, T6s-T7s, 97s, 85s, 74s, 63s, 52s-53s, 43s, A7o-A9o, KJo+, QTo+, JTo, T9o.

Always fold
K2s-K3s, Q3s-Q5s, J2s-J6s, T2s-T5s, 92s-95s, 82s-84s, 72s-73s, 62s, 42s, 32s, A2o-A6o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o-T8o, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-33, A3s-A4s, K7s-K8s, T8s, 98s, 96s, 86s+, 75s+, 64s+, 54s, KTo
Always raise 5/7.5bb
66+, ATs+, A8s, A6s, KJs, QJs, ATo+
Mixed
44-55, A9s, A7s, A5s, A2s, KQs, K9s-KTs, K4s-K6s, Q6s-QTs, Q2s, J7s+, T9s, T6s-T7s, 97s, 85s, 74s, 63s, 52s-53s, 43s, A7o-A9o, KJo+, QTo+, JTo, T9o
Settings: 6-max · 20bb · 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, 20bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.9). 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.