PokerSolver
PokerSolver/6-max · 150bb · SB 0.5bb · 5% rake, cap 3bb/BB vs CO open 2.5bb

BB vs CO open 2.5bb

6-max · SB 0.5bb · 5% rake, cap 3bb (blinds 0.5/1bb) · 150bb · CO opens 2.5bb · Big blind to act

6-max · 150bb · SB 0.5bb · 5% rake, cap 3bbChange game
Stacks (bb), if they differ
Pot 4bbYour cards?
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 68.6%Call 23.3%Raise 5/7.5/10bb 8.1%
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 in 6-max · SB 0.5bb · 5% rake, cap 3bb at 150bb?

CO opens 2.5bb in 6-max · SB 0.5bb · 5% rake, cap 3bb, 150bb: the big blind (BB) folds 68.6%, calls 23.3% and raises 5/7.5/10bb 8.1%. Always call: 55, 22, AJs, A6s, A2s, K8s, K2s-K5s, Q6s-Q9s, J7s, T7s, 96s-97s, 87s, 85s, 75s, 64s, 53s, A9o-AQo, KTo+, QTo+, JTo. Always raise 5/7.5/10bb: QQ+, AQs+, A7s, KTs, QJs, JTs. Mixed: 66-JJ, 33-44, A8s-ATs, A3s-A5s, KJs+, K9s, K6s-K7s, QTs, Q5s, J8s-J9s, T8s+, 98s, 86s, 76s, 65s, 54s, 43s, AKo, A8o, T9o.

Always fold
Q2s-Q4s, J2s-J6s, T2s-T6s, 92s-95s, 82s-84s, 72s-74s, 62s-63s, 52s, 42s, 32s, A2o-A7o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o-T8o, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
55, 22, AJs, A6s, A2s, K8s, K2s-K5s, Q6s-Q9s, J7s, T7s, 96s-97s, 87s, 85s, 75s, 64s, 53s, A9o-AQo, KTo+, QTo+, JTo
Always raise 5/7.5/10bb
QQ+, AQs+, A7s, KTs, QJs, JTs
Mixed
66-JJ, 33-44, A8s-ATs, A3s-A5s, KJs+, K9s, K6s-K7s, QTs, Q5s, J8s-J9s, T8s+, 98s, 86s, 76s, 65s, 54s, 43s, AKo, A8o, T9o
Settings: 6-max · 150bb · SB 0.5bb · 5% rake, cap 3bb (small blind 0.5bb, big blind 1bb, 150bb stacks, 5% rake capped at 3bb; before the flop, rake only after a 3-bet). Solver: HoldemResources Calculator (HRC) (HRC CI 24.94). 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: GGPoker Rush & Cash NL2, NL10, NL50, NL100, NL200; GGPoker regular cash NL200; Natural8 Rush & Cash NL2, NL10, NL50, NL100, NL200; Natural8 regular cash NL200.

Close: GGPoker regular cash NL100 (rake cap 5bb there, 3bb here).

Close: PokerStars Zoom NL50 (rake cap 4bb there, 3bb here; no rake when no flop is dealt there).

Close: PokerStars Zoom NL100 (rake cap 2.5bb there, 3bb here; no rake when no flop is dealt there).

Close: PokerStars cash NL50 (rake cap 4bb there, 3bb here; no rake when no flop is dealt there).

Close: PokerStars cash NL100 (rake cap 2.5bb there, 3bb here; no rake when no flop is dealt there).

Close: CoinPoker cash NL100 (rake cap 5bb there, 3bb here; only its tables without antes).

Close: CoinPoker cash NL200 (only its tables without antes).

Close: WPT Global cash NL10, NL20 (rake cap 6bb there, 3bb here; 4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: WPT Global cash NL100, NL200 (rake cap 4bb there, 3bb here; 4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: WPT Global cash NL400, NL600, NL1000 (rake cap 2bb there, 3bb here; 4% rake there, 5% here; no rake when no flop is dealt there; only its tables without antes).

Close: Natural8 regular cash NL100 (rake cap 5bb there, 3bb here).

Close: ACR Poker cash NL50 (rake cap 6bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

Close: ACR Poker cash NL100 (its page does not say whether pots that end before the flop are raked).

Close: ACR Poker cash NL200 (rake cap 1.5bb there, 3bb here; its page does not say whether pots that end before the flop are raked).

CoinPoker tables with antes: their own chart.

Rake sources: ggpoker.com/poker-games/texas-holdem (fetched 2026-10-31); Rush rake and preflop rake confirmed on our own GG exports (972 of 1,034 pots, 210 of 211); regular tables' preflop rule from natural8.com/en/poker/texas-holdem (same network, fetched 2026-10-31); natural8.com/en/poker/rush-and-cash (fetched 2026-10-31; caps $0.06 to $6, 3bb at every stake); the same GGNetwork pools as GGPoker, whose preflop rake we confirmed on GG exports; natural8.com/en/poker/texas-holdem (fetched 2026-10-31; caps by players dealt in, 3-bet pots raked before the flop); pokerstars.com/poker/room/rake (fetched 2026-10-31); coinpoker.com/games/texas-holdem/ (caps and the preflop rule) and coinpoker.com/guides/poker-rake/ (5%), fetched 2026-10-31; wptglobal.com/poker/poker-table-rake (fetched 2026-10-31); acrpoker.eu/real-money/poker-rake-calculation/ (fetched 2026-10-31).

Tree: Two HRC solves of this game in one: the extra-sizes solve (3-bets to 2x, 3x or 4x, 4-bets to 2.3x or 3x or all-in) wherever it has every move of the base solve, and the base solve where the extra-sizes one allows no second caller (overcalls).