PokerSolver
PokerSolver/3-handed · 100bb · SB 0.4bb · 5% rake, cap 10bb/BB vs SB 4-bet 18bb

BB vs SB 4-bet 18bb

3-handed · SB 0.4bb · 5% rake, cap 10bb (blinds 0.4/1bb) · 100bb · SB opens 2.6bb, BB 3-bets to 7.8bb, SB 4-bets to 18bb · Big blind to act

3-handed · 100bb · SB 0.4bb · 5% rake, cap 10bbChange game
Stacks (bb), if they differ
Pot 25.8bbYour cards?
7.8bb
18bb

Tap your two cards.

Big blind's range

1,108 of 1,326 combos get here
Fold 79.1%Call 12.6%All-in 100bb 8.3%
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 2.6bb, BB 3-bets to 7.8bb, SB 4-bets to 18bb in 3-handed · SB 0.4bb · 5% rake, cap 10bb at 100bb?

SB opens 2.6bb, BB 3-bets to 7.8bb, SB 4-bets to 18bb in 3-handed · SB 0.4bb · 5% rake, cap 10bb, 100bb: the big blind (BB) folds 79.1%, calls 12.6% and goes all-in 100bb 8.3%. Always call: AA, A7o. Mixed: 77-KK, 44-55, 22, A3s+, K8s+, K4s-K5s, K2s, QJs, Q9s, Q6s-Q7s, Q2s-Q3s, JTs, J6s-J8s, J4s, T6s+, T4s, 97s+, 94s, 86s+, 75s, 73s, 64s, 53s, A9o+, A4o, A2o, KTo+, K3o, Q9o-QTo, Q4o, T9o.

Always fold
A2s, K6s-K7s, Q8s, Q5s, J9s, J5s, J2s-J3s, T5s, T2s-T3s, 95s-96s, 92s-93s, 82s-85s, 76s, 74s, 72s, 65s, 62s-63s, 54s, 52s, 42s+, A8o, A5o-A6o, A3o, K9o, K7o, K4o-K5o, K2o, QJo, Q7o-Q8o, Q5o, Q2o, J7o-J9o, J5o, J3o, T8o, T5o-T6o, T2o, 92o-97o, 86o+, 76o, 73o-74o, 64o, 53o
Always call
AA, A7o
Always all-in 100bb
No hand plays this every time
Mixed
77-KK, 44-55, 22, A3s+, K8s+, K4s-K5s, K2s, QJs, Q9s, Q6s-Q7s, Q2s-Q3s, JTs, J6s-J8s, J4s, T6s+, T4s, 97s+, 94s, 86s+, 75s, 73s, 64s, 53s, A9o+, A4o, A2o, KTo+, K3o, Q9o-QTo, Q4o, T9o
Settings: 3-handed · 100bb · SB 0.4bb · 5% rake, cap 10bb (small blind 0.4bb, big blind 1bb, 100bb stacks, 5% rake capped at 10bb; before the flop, rake only after a 3-bet). Solver: HoldemResources Calculator (HRC). 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 NL5 (rake cap 5bb there, 10bb here).

Close: CoinPoker cash NL5 (rake cap 6bb there, 10bb here; only its tables without antes).

Close: Natural8 regular cash NL5 (rake cap 5bb there, 10bb here).

Close: ACR Poker cash NL5 (rake cap 20bb there, 10bb here; its page does not say whether pots that end before the flop are raked).

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); coinpoker.com/games/texas-holdem/ (caps and the preflop rule) and coinpoker.com/guides/poker-rake/ (5%), 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 a 3-handed GG table: this solve caps the rake at 10bb, which is right only for a 6-max hand folded to the button. GG caps an NL5 table with 3 players dealt in at $0.25 (5bb). A solve with GG's cap is queued.