SB vs CO 4-bet 20.7bb
4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO opens 3bb, SB 3-bets to 9bb, CO 4-bets to 20.7bb · Small blind to act
Fits exactlyno game we have checked
CloseCP1 games
- CPCoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 31.34bbYour cards?
9bb
1bb
20.7bb
Tap your two cards.
Small blind's range
306 of 1,326 combos get hereFold 58.1%Call 25.6%All-in 99.84bb 16.4%
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 9bb, CO 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?
CO opens 3bb, SB 3-bets to 9bb, CO 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the small blind (SB) folds 58.1%, calls 25.6% and goes all-in 99.84bb 16.4%. Always call: 44-77, ATs-AQs, KQs, 76s, 65s. Always all-in 99.84bb: QQ+, AKs, A4s, AKo. Mixed: 88-JJ, A5s, A3s, KTs-KJs, QTs+, T9s, AQo.
- Always fold
- A6s-A9s, A2s, K5s-K9s, Q9s, J8s+, T8s, 98s, AJo, KJo+, JTo
- Always call
- 44-77, ATs-AQs, KQs, 76s, 65s
- Always all-in 99.84bb
- QQ+, AKs, A4s, AKo
- Mixed
- 88-JJ, A5s, A3s, KTs-KJs, QTs+, T9s, AQo
Settings: 4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.
Rake sources for the games it fits: 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.