PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB 3-bet 5bb

BB vs SB 3-bet 5bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO opens 2.5bb, SB 3-bets to 5bb · Big blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 9.14bbYour cards?
1bb
2.5bb
5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 92.6%Call 3.2%Raise 11.5bb 2.9%All-in 99.84bb 1.3%
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, SB 3-bets to 5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO opens 2.5bb, SB 3-bets to 5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 92.6%, calls 3.2%, raises 11.5bb 2.9% and goes all-in 99.84bb 1.3%. Mixed: 66+, 33-44, A9s+, A6s, A2s-A4s, KTs-KJs, K6s, QTs, JTs, 86s+, 64s, 54s, 43s, AQo+.

Always fold
55, 22, A7s-A8s, A5s, KQs, K7s-K9s, K2s-K5s, QJs, Q2s-Q9s, J2s-J9s, T2s+, 92s+, 82s-85s, 72s+, 65s, 62s-63s, 52s-53s, 42s, 32s, A2o-AJo, K2o+, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
No hand plays this every time
Always raise 11.5bb
No hand plays this every time
Always all-in 99.84bb
No hand plays this every time
Mixed
66+, 33-44, A9s+, A6s, A2s-A4s, KTs-KJs, K6s, QTs, JTs, 86s+, 64s, 54s, 43s, 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.

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.