BB vs SB call
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, BTN calls, SB calls · 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
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
2.5bb
2.5bb
Tap your two cards.
- The solve has no call for Big blind here: a call would make it a 4-way pot, and this solve stops before that. Multiway pots like this aren't covered yet, so only fold or raise can be shown.
Big blind's range
1,326 of 1,326 combos get hereFold 89.9%Raise 5/7.5bb 10.1%
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, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?
CO opens 2.5bb, BTN calls, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 89.9% and raises 5/7.5bb 10.1%. Always raise 5/7.5bb: 88+, AQs+, ATs, KJs+, AQo+. Mixed: 66-77, AJs, A8s-A9s, A6s, KTs, QTs+, Q7s-Q8s, J8s+, T7s-T8s, T5s, 98s, AJo, KQo, JTo.
- Always fold
- 22-55, A7s, A2s-A5s, K2s-K9s, Q9s, Q2s-Q6s, J2s-J7s, T9s, T6s, T2s-T4s, 92s-97s, 82s+, 72s+, 62s+, 52s+, 42s+, 32s, A2o-ATo, K2o-KJo, Q2o+, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
- Always raise 5/7.5bb
- 88+, AQs+, ATs, KJs+, AQo+
- Mixed
- 66-77, AJs, A8s-A9s, A6s, KTs, QTs+, Q7s-Q8s, J8s+, T7s-T8s, T5s, 98s, AJo, KQo, JTo
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.
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.