PokerSolver
PokerSolver/5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs CO 4-bet 13.8bb

SB vs CO 4-bet 13.8bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO opens 3bb, SB 3-bets to 6bb, CO 4-bets to 13.8bb · Small blind to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 21.6bbYour cards?
6bb
1bb
13.8bb

Tap your two cards.

Small blind's range

186 of 1,326 combos get here
Fold 20.8%Call 70.6%All-in 149.84bb 8.6%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when CO opens 3bb, SB 3-bets to 6bb, CO 4-bets to 13.8bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO opens 3bb, SB 3-bets to 6bb, CO 4-bets to 13.8bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the small blind (SB) folds 20.8%, calls 70.6% and goes all-in 149.84bb 8.6%. Always call: 99-KK, 44-77, AJs-AQs, KJs+, QJs, JTs. Always all-in 149.84bb: AA. Mixed: AKs, A9s-ATs, A4s-A5s, KTs, AQo+.

Always fold
K9s, AJo, KQo
Always call
99-KK, 44-77, AJs-AQs, KJs+, QJs, JTs
Always all-in 149.84bb
AA
Mixed
AKs, A9s-ATs, A4s-A5s, KTs, AQo+
Settings: 5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). 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: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: the ante from 93 of our own CoinPoker hands at $0.25/$0.50 with a $0.08 ante, played 2026-09-30; the caps and the preflop rule from coinpoker.com/games/texas-holdem/, fetched 2026-10-31.