SB vs CO 4-bet 18.4bb
6-max · SB 0.5bb · 5% rake, cap 3bb (blinds 0.5/1bb) · 100bb · CO opens 2bb, SB 3-bets to 8bb, CO 4-bets to 18.4bb · Small blind to act
6-max · 100bb · SB 0.5bb · 5% rake, cap 3bbChange game
Tap your two cards.
Small blind's range
230 of 1,326 combos get hereWhat is the GTO play for the small blind (SB) when CO opens 2bb, SB 3-bets to 8bb, CO 4-bets to 18.4bb in 6-max · SB 0.5bb · 5% rake, cap 3bb at 100bb?
CO opens 2bb, SB 3-bets to 8bb, CO 4-bets to 18.4bb in 6-max · SB 0.5bb · 5% rake, cap 3bb, 100bb: the small blind (SB) folds 51.9%, calls 38.2% and goes all-in 100bb 9.9%. Always call: TT-QQ, 88, 55-66, AJs+, KJs, 65s. Mixed: KK+, 99, 77, 44, ATs, A4s-A5s, KQs, KTs, JTs, T9s, 54s, AKo.
- Always fold
- A6s-A8s, A2s-A3s, K6s-K9s, Q9s+, J9s, AQo, KQo
- Always call
- TT-QQ, 88, 55-66, AJs+, KJs, 65s
- Always all-in 100bb
- No hand plays this every time
- Mixed
- KK+, 99, 77, 44, ATs, A4s-A5s, KQs, KTs, JTs, T9s, 54s, AKo
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).