PokerSolver
PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs CO 4-bet 17.25bb

BB vs CO 4-bet 17.25bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO opens 2.5bb, BB 3-bets to 7.5bb, CO 4-bets to 17.25bb · Big blind to act

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 25.89bbYour cards?
7.5bb
17.25bb
0.5bb

Tap your two cards.

Big blind's range

352 of 1,326 combos get here
Fold 55.5%Call 35.6%Raise 37.95bb 8.5%All-in 249.84bb 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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

CO opens 2.5bb, BB 3-bets to 7.5bb, CO 4-bets to 17.25bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the big blind (BB) folds 55.5%, calls 35.6%, raises 37.95bb 8.5% and goes all-in 249.84bb 0.4%. Always call: 99, 33-66, AQs, AKo. Always raise 37.95bb: AA. Mixed: TT-KK, 77-88, AKs, A2s-AJs, KTs+, QTs+, JTs, T8s+, 97s+, 86s+, 76s, 65s, 54s.

Always fold
K4s-K9s, Q8s-Q9s, Q5s-Q6s, J8s-J9s, 96s, 64s, 43s, AJo-AQo, QJo, JTo
Always call
99, 33-66, AQs, AKo
Always raise 37.95bb
AA
Always all-in 249.84bb
No hand plays this every time
Mixed
TT-KK, 77-88, AKs, A2s-AJs, KTs+, QTs+, JTs, T8s+, 97s+, 86s+, 76s, 65s, 54s
Settings: 4-max · 250bb · 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, 250bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.91). 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.