PokerSolver/6-max · 150bb · SB 0.5bb · 5% rake, cap 3bb/BB vs SB 4-bet 18bb

BB vs SB 4-bet 18bb

6-max · SB 0.5bb · 5% rake, cap 3bb (blinds 0.5/1bb) · 150bb · SB opens 2bb, BB 3-bets to 6bb, SB 4-bets to 18bb · Big blind to act

6-max · 150bb · SB 0.5bb · 5% rake, cap 3bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differUTGHJCOBTNSBBB

Pot 24bbYour cards?

6bb

18bb

Tap your two cards.

Big blind's range

998 of 1,326 combos get here

Fold 77.8%Call 16.1%Raise 39.6bb 5.8%All-in 150bb 0.3%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when SB opens 2bb, BB 3-bets to 6bb, SB 4-bets to 18bb in 6-max · SB 0.5bb · 5% rake, cap 3bb at 150bb?

SB opens 2bb, BB 3-bets to 6bb, SB 4-bets to 18bb in 6-max · SB 0.5bb · 5% rake, cap 3bb, 150bb: the big blind (BB) folds 77.8%, calls 16.1%, raises 39.6bb 5.8% and goes all-in 150bb 0.3%. Always call: 77-JJ, 33-55, AJs-AQs, A9s, A4s, KQs, KTs, QTs+, J9s+, T9s, 54s. Mixed: QQ+, 66, 22, AKs, ATs, A5s-A7s, A2s-A3s, KJs, K6s-K9s, K2s, T8s, 96s+, 86s+, 76s, 65s, AJo+, KTo+.

Always fold: K3s, Q9s, Q5s-Q7s, Q3s, J4s-J8s, J2s, T2s-T7s, 92s-95s, 82s-85s, 72s-75s, 62s-64s, 52s-53s, 42s+, 32s, ATo, A6o, A2o-A4o, K2o-K9o, QJo, Q2o-Q9o, J5o+, T6o+, 96o+, 75o+, 64o, 53o+, 43o
Always call: 77-JJ, 33-55, AJs-AQs, A9s, A4s, KQs, KTs, QTs+, J9s+, T9s, 54s
Always raise 39.6bb: No hand plays this every time
Always all-in 150bb: No hand plays this every time
Mixed: QQ+, 66, 22, AKs, ATs, A5s-A7s, A2s-A3s, KJs, K6s-K9s, K2s, T8s, 96s+, 86s+, 76s, 65s, AJo+, KTo+

Settings: 6-max · 150bb · SB 0.5bb · 5% rake, cap 3bb (small blind 0.5bb, big blind 1bb, 150bb stacks, 5% rake capped at 3bb; before the flop, rake only after a 3-bet). Solver: HoldemResources Calculator (HRC) (HRC CI 24.94). 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 NL100 (rake cap 5bb there, 3bb here).

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 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 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 NL100 (rake cap 5bb there, 3bb here).

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).

Tree: Two HRC solves of this game in one: the extra-sizes solve (3-bets to 2x, 3x or 4x, 4-bets to 2.3x or 3x or all-in) wherever it has every move of the base solve, and the base solve where the extra-sizes one allows no second caller (overcalls).