PokerSolver
PokerSolver/4-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN iso raise 3bb

BB vs BTN iso raise 3bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · CO limps, BTN isolates to 3bb · 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 6.14bbYour cards?
1bb
1bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 81.4%Call 14.2%Raise 6/9bb 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 3bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 200bb?

CO limps, BTN isolates to 3bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 200bb: the big blind (BB) folds 81.4%, calls 14.2% and raises 6/9bb 4.4%. Always call: 77, A8s, A5s-A6s, T9s, AKo, KQo. Always raise 6/9bb: AA, ATs. Mixed: 88-KK, 22-66, AJs+, A9s, A7s, A2s-A4s, K9s+, K7s, K5s, Q9s+, Q6s, J7s+, T8s, 97s+, 87s, 76s, 64s+, 54s, ATo-AQo, KJo, QJo.

Always fold
K8s, K6s, K2s-K4s, Q7s-Q8s, Q2s-Q5s, J2s-J6s, T2s-T7s, 92s-96s, 82s-86s, 72s-75s, 62s-63s, 52s-53s, 42s+, 32s, A2o-A9o, K2o-KTo, Q2o-QTo, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
77, A8s, A5s-A6s, T9s, AKo, KQo
Always raise 6/9bb
AA, ATs
Mixed
88-KK, 22-66, AJs+, A9s, A7s, A2s-A4s, K9s+, K7s, K5s, Q9s+, Q6s, J7s+, T8s, 97s+, 87s, 76s, 64s+, 54s, ATo-AQo, KJo, QJo
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.