PokerSolver
PokerSolver/4-max · 80bb · 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) · 80bb · SB opens 2bb · Big blind to act

4-max · 80bb · 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 7.4%Call 71.1%Raise 4/6bb 21.5%
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 80bb?

SB opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 7.4%, calls 71.1% and raises 4/6bb 21.5%. Always call: 77, 22-44, K8s, K6s, K2s-K4s, QTs, Q6s-Q8s, Q2s-Q4s, J7s, J2s-J5s, T4s, T2s, 96s, 82s-84s, 74s-75s, 63s-64s, 52s+, 43s, A9o, A4o-A7o, K7o-KJo, K5o, Q7o-QTo, Q3o-Q4o, J9o+, J3o-J5o, T7o-T8o, T3o, 98o, 94o-95o, 87o, 85o, 74o+, 64o+, 53o+. Always raise 4/6bb: 99+, ATs+, KQs, KTs, AQo+. Mixed: 88, 55-66, A2s-A9s, KJs, K9s, K7s, K5s, QJs, Q9s, Q5s, J8s+, J6s, T5s+, T3s, 97s+, 92s-95s, 85s+, 76s, 72s-73s, 65s, 62s, 42s, 32s, ATo-AJo, A8o, A2o-A3o, KQo, K6o, K2o-K4o, QJo, Q5o-Q6o, Q2o, J6o-J8o, J2o, T9o, T4o-T6o, T2o, 96o-97o, 92o-93o, 86o, 84o, 73o, 63o, 52o, 42o+, 32o.

Always fold
82o-83o, 72o, 62o
Always call
77, 22-44, K8s, K6s, K2s-K4s, QTs, Q6s-Q8s, Q2s-Q4s, J7s, J2s-J5s, T4s, T2s, 96s, 82s-84s, 74s-75s, 63s-64s, 52s+, 43s, A9o, A4o-A7o, K7o-KJo, K5o, Q7o-QTo, Q3o-Q4o, J9o+, J3o-J5o, T7o-T8o, T3o, 98o, 94o-95o, 87o, 85o, 74o+, 64o+, 53o+
Always raise 4/6bb
99+, ATs+, KQs, KTs, AQo+
Mixed
88, 55-66, A2s-A9s, KJs, K9s, K7s, K5s, QJs, Q9s, Q5s, J8s+, J6s, T5s+, T3s, 97s+, 92s-95s, 85s+, 76s, 72s-73s, 65s, 62s, 42s, 32s, ATo-AJo, A8o, A2o-A3o, KQo, K6o, K2o-K4o, QJo, Q5o-Q6o, Q2o, J6o-J8o, J2o, T9o, T4o-T6o, T2o, 96o-97o, 92o-93o, 86o, 84o, 73o, 63o, 52o, 42o+, 32o
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.

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.