PokerSolver
PokerSolver/6-max · 10bb · 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) · 10bb · CO opens 2.5bb · Big blind to act

6-max · 10bb · 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 72.1%Call 12.9%All-in 10bb 15%
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 10bb?

CO opens 2.5bb in 6-max · SB 0.5bb · 5% rake, cap 3bb, 10bb: the big blind (BB) folds 72.1%, calls 12.9% and goes all-in 10bb 15%. Always call: A7s-A8s, K9s-KTs, K7s, K3s-K4s, Q8s-QTs, J8s-J9s, T9s, KTo-KJo, QJo. Always all-in 10bb: 99-KK, 66, 22-44, AJs+, A9s, A4s-A5s, A2s, KQs, JTs, AJo+, A9o, KQo. Mixed: AA, 77-88, 55, ATs, A6s, A3s, KJs, K8s, K5s-K6s, K2s, QJs, Q6s-Q7s, Q3s-Q4s, J6s-J7s, J3s, 97s+, 87s, 76s, 64s+, 54s, ATo, A7o-A8o, A4o-A5o, QTo, J9o+.

Always fold
Q5s, Q2s, J4s-J5s, J2s, T2s-T8s, 92s-96s, 82s-86s, 72s-75s, 62s-63s, 52s-53s, 42s+, 32s, A6o, A2o-A3o, K2o-K9o, Q2o-Q9o, J2o-J8o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
A7s-A8s, K9s-KTs, K7s, K3s-K4s, Q8s-QTs, J8s-J9s, T9s, KTo-KJo, QJo
Always all-in 10bb
99-KK, 66, 22-44, AJs+, A9s, A4s-A5s, A2s, KQs, JTs, AJo+, A9o, KQo
Mixed
AA, 77-88, 55, ATs, A6s, A3s, KJs, K8s, K5s-K6s, K2s, QJs, Q6s-Q7s, Q3s-Q4s, J6s-J7s, J3s, 97s+, 87s, 76s, 64s+, 54s, ATo, A7o-A8o, A4o-A5o, QTo, J9o+
Settings: 6-max · 10bb · SB 0.5bb · 5% rake, cap 3bb (small blind 0.5bb, big blind 1bb, 10bb stacks, 5% rake capped at 3bb; before the flop, rake only after a 3-bet). Solver: HoldemResources Calculator (HRC) (HRC CI 8.29). 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 NL2, NL10, NL50, NL100, NL200; Natural8 Rush & Cash NL2, NL10, NL50, NL100, NL200; Natural8 regular cash NL2, NL10, NL50, NL100, NL200.

Close: PokerStars Zoom NL10 (rake cap 15bb there, 3bb here; 4.5% rake there, 5% here; no rake when no flop is dealt there).

Close: PokerStars Zoom NL50 (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 NL10 (rake cap 15bb there, 3bb here; 4.25% rake there, 5% here; no rake when no flop is dealt there).

Close: PokerStars cash NL50 (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 NL2, NL10, NL50, NL100, 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: ACR Poker cash NL2, NL10, NL50, 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).