PokerSolver
PokerSolver/6-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO 4-bet 17.25bb

BB vs CO 4-bet 17.25bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · CO opens 2.5bb, BB 3-bets to 7.5bb, CO 4-bets to 17.25bb · Big blind to act

6-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 26.21bbYour cards?
7.5bb
17.25bb
0.5bb

Tap your two cards.

Big blind's range

434 of 1,326 combos get here
Fold 66.9%Call 24.4%Raise 37.95bb 8.4%All-in 199.84bb 0.4%
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 2.5bb, BB 3-bets to 7.5bb, CO 4-bets to 17.25bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 200bb?

CO opens 2.5bb, BB 3-bets to 7.5bb, CO 4-bets to 17.25bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 200bb: the big blind (BB) folds 66.9%, calls 24.4%, raises 37.95bb 8.4% and goes all-in 199.84bb 0.4%. Always call: QQ, 99-TT, 33-77. Always raise 37.95bb: AA. Mixed: KK, JJ, 88, ATs+, A8s, A4s-A6s, KQs, KTs, QTs+, JTs, T7s+, 86s+, 76s, 64s+, AKo.

Always fold
A7s, A2s-A3s, KJs, K5s-K9s, Q8s-Q9s, Q6s, J8s-J9s, J5s-J6s, T5s-T6s, 98s, 96s, 75s, 53s+, 43s, AJo-AQo, KTo+, QJo, JTo, T8o
Always call
QQ, 99-TT, 33-77
Always raise 37.95bb
AA
Always all-in 199.84bb
No hand plays this every time
Mixed
KK, JJ, 88, ATs+, A8s, A4s-A6s, KQs, KTs, QTs+, JTs, T7s+, 86s+, 76s, 64s+, AKo
Settings: 6-max · 200bb · 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, 200bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 28.67). 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.