PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN call

BB vs BTN call

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO opens 2.5bb, BTN calls · 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 · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 7.14bbYour cards?
1bb
2.5bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 76.1%Call 10.7%Raise 5/7.5bb 13.3%
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, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

CO opens 2.5bb, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 76.1%, calls 10.7% and raises 5/7.5bb 13.3%. Always call: 22-44, A2s-A3s, K6s. Always raise 5/7.5bb: 99+, ATs+, KJs+, JTs, 87s, AQo+. Mixed: 55-88, A4s-A9s, K7s-KTs, K2s-K5s, Q9s+, Q4s, J8s-J9s, T8s+, T6s, 96s+, 86s, 75s+, 64s+, 53s+, 43s, ATo-AJo, KTo+, QTo+, JTo.

Always fold
Q5s-Q8s, Q2s-Q3s, J2s-J7s, T7s, T2s-T5s, 92s-95s, 82s-85s, 72s-74s, 62s-63s, 52s, 42s, 32s, A2o-A9o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-44, A2s-A3s, K6s
Always raise 5/7.5bb
99+, ATs+, KJs+, JTs, 87s, AQo+
Mixed
55-88, A4s-A9s, K7s-KTs, K2s-K5s, Q9s+, Q4s, J8s-J9s, T8s+, T6s, 96s+, 86s, 75s+, 64s+, 53s+, 43s, ATo-AJo, KTo+, QTo+, JTo
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.