PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · 5% rake, cap 3bb/BB vs SB iso raise 2.5bb

BB vs SB iso raise 2.5bb

4-max · SB 0.5bb · 5% rake, cap 3bb (blinds 0.5/1bb) · 100bb · BTN limps, SB isolates to 2.5bb · Big blind to act

4-max · 100bb · 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 87.5%Call 5.6%Raise 5/7.5bb 6.9%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN limps, SB isolates to 2.5bb in 4-max · SB 0.5bb · 5% rake, cap 3bb at 100bb?

BTN limps, SB isolates to 2.5bb in 4-max · SB 0.5bb · 5% rake, cap 3bb, 100bb: the big blind (BB) folds 87.5%, calls 5.6% and raises 5/7.5bb 6.9%. Always call: 77, A8s. Always raise 5/7.5bb: KK+, JJ, AKo. Mixed: QQ, 88-TT, 66, 22-44, A9s+, A7s, A2s-A4s, K9s+, K2s, QTs+, Q2s, JTs, J3s, T9s, T7s, T3s, 98s, 92s, 87s, 63s, 53s+, AJo-AQo, KQo, QJo.

Always fold
55, A5s-A6s, K3s-K8s, Q3s-Q9s, J4s-J9s, J2s, T8s, T4s-T6s, T2s, 93s-97s, 82s-86s, 72s+, 64s+, 62s, 52s, 42s+, 32s, A2o-ATo, K2o-KJo, Q2o-QTo, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
77, A8s
Always raise 5/7.5bb
KK+, JJ, AKo
Mixed
QQ, 88-TT, 66, 22-44, A9s+, A7s, A2s-A4s, K9s+, K2s, QTs+, Q2s, JTs, J3s, T9s, T7s, T3s, 98s, 92s, 87s, 63s, 53s+, AJo-AQo, KQo, QJo
Settings: 4-max · 100bb · SB 0.5bb · 5% rake, cap 3bb (small blind 0.5bb, big blind 1bb, 100bb stacks, 5% rake capped at 3bb; before the flop, rake only after a 3-bet). Solver: HoldemResources Calculator (HRC) (HRC CI 20.31). 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: GGPoker regular cash NL50 (rake cap 6bb there, 3bb here).

Close: GGPoker regular cash NL100 (rake cap 3.75bb there, 3bb here).

Close: GGPoker regular cash NL200 (rake cap 2.25bb there, 3bb here).

Close: PokerStars cash NL50 (rake cap 1.5bb there, 3bb here; no rake when no flop is dealt there).

Close: CoinPoker cash NL2, NL10 (rake cap 6bb there, 3bb here; only its tables without antes).

Close: CoinPoker cash NL50 (rake cap 4.8bb there, 3bb here; only its tables without antes).

Close: CoinPoker cash NL100 (only its tables without antes).

Close: CoinPoker cash NL200 (rake cap 1.8bb there, 3bb here; only its tables without antes).

Close: WPT Global cash NL10, NL20 (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 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 NL50 (rake cap 6bb there, 3bb here).

Close: Natural8 regular cash NL100 (rake cap 3.75bb there, 3bb here).

Close: Natural8 regular cash NL200 (rake cap 2.25bb there, 3bb here).

Close: ACR Poker cash NL50 (rake cap 4bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

Close: ACR Poker cash NL100 (rake cap 2bb 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); 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); natural8.com/en/poker/texas-holdem (fetched 2026-10-31; caps by players dealt in, 3-bet pots raked before the flop); acrpoker.eu/real-money/poker-rake-calculation/ (fetched 2026-10-31).

Rake: Wrong rake for GG: this solve caps the rake at 3bb, but GG caps NL200 at $4.50 (2.25bb) with 4 players dealt in and $3 (1.5bb) with 3. A solve with GG's caps is queued.