BB vs CO 4-bet 20.7bb
5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO opens 3bb, BB 3-bets to 9bb, CO 4-bets to 20.7bb · Big 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
5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 31bbYour cards?
9bb
20.7bb
0.5bb
Tap your two cards.
Big blind's range
494 of 1,326 combos get hereFold 71%Call 10.4%All-in 79.84bb 18.6%
Tap a hand, or type one above, to see its exact mix.
What is the GTO play for the big blind (BB) when CO opens 3bb, BB 3-bets to 9bb, CO 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?
CO opens 3bb, BB 3-bets to 9bb, CO 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 71%, calls 10.4% and goes all-in 79.84bb 18.6%. Always call: ATs-AJs, A8s, 76s, 65s, 54s. Always all-in 79.84bb: TT+, 55-77, AKs, A5s, AKo. Mixed: 88, AQs, A4s, KQs, KTs, QJs, JTs, T9s, 98s, 87s.
- Always fold
- A6s, A2s-A3s, KJs, K2s-K9s, Q4s-Q8s, Q2s, J3s-J8s, T8s, T6s, 96s, 85s-86s, 63s, 52s-53s, 43s, AQo, A5o-A8o, K8o+, QJo, J9o+, T9o
- Always call
- ATs-AJs, A8s, 76s, 65s, 54s
- Always all-in 79.84bb
- TT+, 55-77, AKs, A5s, AKo
- Mixed
- 88, AQs, A4s, KQs, KTs, QJs, JTs, T9s, 98s, 87s
Settings: 5-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.