PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB open 2bb

BB vs SB open 2bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · SB opens 2bb · 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 3.64bbYour cards?
1bb
2bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 8.9%Call 67.1%Raise 4/6bb 24%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when SB opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

SB opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 8.9%, calls 67.1% and raises 4/6bb 24%. Always call: K7s, K5s, K2s, Q7s-Q8s, Q2s-Q5s, J2s-J7s, T6s, T4s, T2s, 93s-94s, 83s-85s, 73s-74s, 62s-63s, 42s+, 32s, A3o-ATo, K6o-KJo, K2o-K3o, Q8o+, Q3o-Q5o, JTo, J4o-J5o, J2o, T8o+, 97o+, 95o, 85o+, 76o, 74o, 64o+, 53o+. Always raise 4/6bb: 99+, ATs+, A5s, A3s, KTs+, T8s, 98s, 65s, AQo+. Mixed: 22-88, A6s-A9s, A4s, A2s, K8s-K9s, K6s, K3s-K4s, Q9s+, Q6s, J8s+, T9s, T7s, T5s, T3s, 95s-97s, 92s, 86s+, 82s, 75s+, 72s, 64s, 52s+, AJo, A2o, KQo, K4o-K5o, Q6o-Q7o, Q2o, J6o-J9o, J3o, T2o-T7o, 96o, 92o-94o, 84o, 75o, 63o, 52o, 43o.

Always fold
82o-83o, 72o-73o, 62o, 42o, 32o
Always call
K7s, K5s, K2s, Q7s-Q8s, Q2s-Q5s, J2s-J7s, T6s, T4s, T2s, 93s-94s, 83s-85s, 73s-74s, 62s-63s, 42s+, 32s, A3o-ATo, K6o-KJo, K2o-K3o, Q8o+, Q3o-Q5o, JTo, J4o-J5o, J2o, T8o+, 97o+, 95o, 85o+, 76o, 74o, 64o+, 53o+
Always raise 4/6bb
99+, ATs+, A5s, A3s, KTs+, T8s, 98s, 65s, AQo+
Mixed
22-88, A6s-A9s, A4s, A2s, K8s-K9s, K6s, K3s-K4s, Q9s+, Q6s, J8s+, T9s, T7s, T5s, T3s, 95s-97s, 92s, 86s+, 82s, 75s+, 72s, 64s, 52s+, AJo, A2o, KQo, K4o-K5o, Q6o-Q7o, Q2o, J6o-J9o, J3o, T2o-T7o, 96o, 92o-94o, 84o, 75o, 63o, 52o, 43o
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.