PokerSolver
PokerSolver/6-max · 15bb · SB 0.5bb · 5% rake, cap 3bb/BB vs SB iso raise 2.5bb

BB vs SB iso raise 2.5bb

6-max · SB 0.5bb · 5% rake, cap 3bb (blinds 0.5/1bb) · 15bb · CO limps, SB isolates to 2.5bb · Big blind to act

6-max · 15bb · SB 0.5bb · 5% rake, cap 3bbChange game
Stacks (bb), if they differ
Pot 4.5bbYour cards?
1bb
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 86.4%Call 5.5%Raise 5bb 2.4%All-in 15bb 5.7%
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, SB isolates to 2.5bb in 6-max · SB 0.5bb · 5% rake, cap 3bb at 15bb?

CO limps, SB isolates to 2.5bb in 6-max · SB 0.5bb · 5% rake, cap 3bb, 15bb: the big blind (BB) folds 86.4%, calls 5.5%, raises 5bb 2.4% and goes all-in 15bb 5.7%. Always call: KJs. Always all-in 15bb: AKs, AKo. Mixed: 55+, A5s-AQs, A3s, KQs, K7s-KTs, K5s, K2s-K3s, QJs, Q9s, Q6s-Q7s, Q4s, J9s, J6s-J7s, J4s, T8s+, T5s, 97s+, 93s, 87s, 85s, 75s+, 73s, 64s, 53s+, 43s, A9o-AQo, A3o, KQo, K4o, Q8o, 75o, 54o.

Always fold
22-44, A4s, A2s, K6s, K4s, QTs, Q8s, Q5s, Q2s-Q3s, JTs, J8s, J5s, J2s-J3s, T6s-T7s, T2s-T4s, 94s-96s, 92s, 86s, 82s-84s, 74s, 72s, 65s, 62s-63s, 52s, 42s, 32s, A4o-A8o, A2o, K5o-KJo, K2o-K3o, Q9o+, Q2o-Q7o, J2o+, T2o+, 92o+, 82o+, 76o, 72o-74o, 62o+, 52o-53o, 42o+, 32o
Always call
KJs
Always raise 5bb
No hand plays this every time
Always all-in 15bb
AKs, AKo
Mixed
55+, A5s-AQs, A3s, KQs, K7s-KTs, K5s, K2s-K3s, QJs, Q9s, Q6s-Q7s, Q4s, J9s, J6s-J7s, J4s, T8s+, T5s, 97s+, 93s, 87s, 85s, 75s+, 73s, 64s, 53s+, 43s, A9o-AQo, A3o, KQo, K4o, Q8o, 75o, 54o
Settings: 6-max · 15bb · SB 0.5bb · 5% rake, cap 3bb (small blind 0.5bb, big blind 1bb, 15bb stacks, 5% rake capped at 3bb; before the flop, rake only after a 3-bet). Solver: HoldemResources Calculator (HRC) (HRC CI 9.8). 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: GGPoker Rush & Cash NL2, NL10, NL50, NL100, NL200; GGPoker regular cash NL200; Natural8 Rush & Cash NL2, NL10, NL50, NL100, NL200; Natural8 regular cash NL200.

Close: GGPoker regular cash NL2, NL10 (rake cap 10bb there, 3bb here).

Close: GGPoker regular cash NL50 (rake cap 8bb there, 3bb here).

Close: GGPoker regular cash NL100 (rake cap 5bb there, 3bb here).

Close: PokerStars Zoom NL10 (rake cap 15bb there, 3bb here; 4.5% rake there, 5% here; no rake when no flop is dealt there).

Close: PokerStars Zoom NL50 (rake cap 4bb there, 3bb here; no rake when no flop is dealt there).

Close: PokerStars Zoom NL100 (rake cap 2.5bb there, 3bb here; no rake when no flop is dealt there).

Close: PokerStars cash NL10 (rake cap 15bb there, 3bb here; 4.25% rake there, 5% here; no rake when no flop is dealt there).

Close: PokerStars cash NL50 (rake cap 4bb there, 3bb here; no rake when no flop is dealt there).

Close: PokerStars cash NL100 (rake cap 2.5bb there, 3bb here; no rake when no flop is dealt there).

Close: CoinPoker cash NL2, NL10 (rake cap 10bb there, 3bb here; only its tables without antes).

Close: CoinPoker cash NL50 (rake cap 8bb there, 3bb here; only its tables without antes).

Close: CoinPoker cash NL100 (rake cap 5bb there, 3bb here; only its tables without antes).

Close: CoinPoker cash NL200 (only its tables without antes).

Close: WPT Global cash NL10, NL20 (rake cap 6bb there, 3bb here; 4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: WPT Global cash NL100, NL200 (rake cap 4bb there, 3bb here; 4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: WPT Global cash NL400, NL600, NL1000 (rake cap 2bb there, 3bb here; 4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: Natural8 regular cash NL2, NL10 (rake cap 10bb there, 3bb here).

Close: Natural8 regular cash NL50 (rake cap 8bb there, 3bb here).

Close: Natural8 regular cash NL100 (rake cap 5bb there, 3bb here).

Close: ACR Poker cash NL2 (rake cap 150bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

Close: ACR Poker cash NL10 (rake cap 30bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

Close: ACR Poker cash NL50 (rake cap 6bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

Close: ACR Poker cash NL100 (its page does not say whether pots that end before the flop are raked).

Close: ACR Poker cash NL200 (rake cap 1.5bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

CoinPoker tables with antes: their own chart.

Rake sources: ggpoker.com/poker-games/texas-holdem (fetched 2026-10-31); Rush rake and preflop rake confirmed on our own GG exports (972 of 1,034 pots, 210 of 211); regular tables' preflop rule from natural8.com/en/poker/texas-holdem (same network, fetched 2026-10-31); natural8.com/en/poker/rush-and-cash (fetched 2026-10-31; caps $0.06 to $6, 3bb at every stake); the same GGNetwork pools as GGPoker, whose preflop rake we confirmed on GG exports; natural8.com/en/poker/texas-holdem (fetched 2026-10-31; caps by players dealt in, 3-bet pots raked before the flop); pokerstars.com/poker/room/rake (fetched 2026-10-31); coinpoker.com/games/texas-holdem/ (caps and the preflop rule) and coinpoker.com/guides/poker-rake/ (5%), fetched 2026-10-31; wptglobal.com/poker/poker-table-rake (fetched 2026-10-31); acrpoker.eu/real-money/poker-rake-calculation/ (fetched 2026-10-31).