Blind vs Blind Poker: the Most Frequent Spot Nobody Studies
In 6-max, roughly one hand in five is played small blind against big blind. That is more than every 3-bet spot combined. Yet it is also the spot most players improvise the hardest: ranges on feel, default sizings, postflop with no plan.
The reason is simple: it is uncomfortable on both sides. Ranges are wide, hands are weak, and the small blind plays out of position for the rest of the hand. This guide gives you a complete structure for both seats, preflop and postflop.
Why this spot is hard
Three features set it apart from every other.
1. Ranges are wide and weak. Neither player has a nutted range. The result is a game where marginal hands decide pots, which multiplies the number of difficult decisions.
2. The small blind is out of position forever. Unlike every other opening position, nobody is behind to compensate. The small blind's equity realisation is structurally poor.
3. There is dead money in the middle. One and a half big blinds are already invested before the first decision, which makes stealing immediately profitable and pushes both ranges wider.
Small blind: raise-only or mixed strategy?
That is the central debate of the spot, and it has a clear practical answer.
Raise-only. You open a solid range and fold the rest. Simple, robust, hard to exploit.
Mixed with limps. You limp part of your range and raise the rest. Theoretically superior, because it lets you play more hands cheaply.
| Criterion | Raise-only | Mixed with limps |
|---|---|---|
| Simplicity | Excellent | Poor |
| Robustness vs an aggressive BB | Good | Weak |
| Theoretical value | Solid | Higher |
| Rake sensitivity | Low | High |
| Suited to multi-tabling | Yes | Difficult |
Practical recommendation: play raise-only, unless you play few tables, against opponents you know, at stakes where rake does not eat small pots. A poorly executed limping strategy against a big blind who iso-raises aggressively loses far more than the theoretical value it claims to capture.
Small blind opening ranges
Playing raise-only at 100 big blinds:
| Category | Hands |
|---|---|
| Pairs | 22+ |
| Suited aces | A2s+ |
| Offsuit aces | A2o+ |
| Suited kings | K2s+ |
| Offsuit kings | K7o+ |
| Broadways | QTs+, QJo+, JTs, JTo, T9s |
| Suited connectors | 54s+ |
| Other suited | Q8s+, J8s+, T8s, 97s, 86s |
That comes to roughly 45% of hands. The comparison with opening ranges by position is instructive: wider than the cutoff, tighter than the button. You face a single opponent, but you will play out of position.
Sizing: 3 big blinds is the standard, versus 2 to 2.5 on the button. A larger sizing compensates for the positional disadvantage, cuts the number of hands the big blind can profitably defend, and leaves a lower SPR in a spot you control poorly.
Big blind facing a small blind open
This is the most under-defended position in online poker.
The odds are exceptional. Facing a 3 big blind open you pay 2 to win 4.5, needing roughly 31% equity. Few hands are that bad.
You are in position postflop. This is the only configuration where the big blind plays in position, which sharply improves equity realisation.
| Action | Recommended frequency | Composition |
|---|---|---|
| 3-bet | 12-16% | Medium and high pairs, strong aces, some suited connectors as bluffs |
| Call | 45-55% | Everything else playable: small pairs, weak aces, suited hands, broadways |
| Fold | 30-40% | Genuinely disconnected offsuit hands |
The full reasoning on defence odds is developed in the big blind defence guide; blind versus blind is its most favourable special case.
3-betting is wider here than anywhere else, for two reasons: their opening range is wide, and the small blind will struggle to defend out of position. It is one of the most profitable 3-bet spots in the game, as detailed in the 3-bet guide.
Facing a small blind limp
If your opponent limps, two responses coexist.
Iso-raise wide. A limp usually signals a marginal hand or a poorly executed strategy. Raising to 4 or 4.5 big blinds with a wide range takes the dead money directly. The full logic is in the iso-raise against a limper guide.
Check behind with the rest. You see a free flop in position with a wide range.
The mistake to avoid: iso-raising only with good hands. An attentive opponent will notice that your raise is always value and your check is always weak.
Postflop blind versus blind
Wide, weak ranges on both sides create a distinctive postflop dynamic.
1. C-bet frequencies are moderate. Nobody holds many strong hands. From the small blind after a called open, a 40 to 55% c-bet frequency is a reasonable starting point, versus 60 to 70% in a button versus big blind spot.
2. Sizings are smaller. On most textures, 25 to 33% of pot is enough: you have little to protect, and you want to keep their wide range in the pot.
3. The check-raise takes on unusual importance. From the big blind with position, and from the small blind without it, check-raising compensates for the shortage of nutted hands and stops your opponent betting at will. The check-raise is what makes these ranges defensible.
4. Low boards favour the big blind. Their calling range holds more small connected cards than the small blind's opening range. On a 7 5 3 flop, the range advantage belongs to the defender.
The rake effect
At small stakes, rake genuinely shifts the thresholds of this spot.
- You have already invested dead blinds, so every pot you win is trimmed before it comes back to you.
- Marginal hands, the ones that win a tiny amount in theory, turn neutral or losing once the rake applies.
Two practical consequences: limping from the small blind loses most of its appeal, and big blind defence tightens slightly on the weakest hands. The detail of room-by-room structures is in the rake comparison.
Adjustments by opponent profile
| Their profile | Adjustment |
|---|---|
| BB folds too much | Open almost every hand from the small blind |
| BB 3-bets a lot | Tighten your open, widen your 4-bet |
| SB limps often | Iso-raise very wide from the big blind |
| SB never c-bets | Float wide, take pots on the turn |
| SB c-bets everything | Check-raise more often on low boards |
These adjustments assume you know who you are facing. Blind versus blind, you often face the same table neighbours for entire orbits, which makes the opponent profile especially valuable here.
Building blind versus blind ranges in GrindLab
This is the ideal spot for structured range work, because it recurs constantly and reduces to a handful of configurations.
- Build four ranges in the editor: small blind open, big blind defence, big blind 3-bet, and the response to a 3-bet.
- Save them in a dedicated folder and pull them back up session after session.
- Run the typical blind versus blind flop textures to see each range's equity on low boards.
- Go back through your imported hands and compare what you actually played to the range you defined. The gap is almost always wider than expected.
Calculate hand equity, pot odds, and compare ranges with GrindLab's free equity engine
Try it free →The most common mistakes
1. Over-folding the big blind. The most expensive error in the spot. Facing a small blind open, the odds justify defending more than half your hands.
2. Limping from the small blind with no plan. A limp with no follow-up strategy against a raise hands your opponent a free pot every orbit.
3. Using button sizing from the small blind. Sizing here should be larger to compensate for position.
4. C-betting automatically. Your small blind opening range is not strong enough to support a high c-bet frequency.
5. Neglecting the check-raise. Without it, your checking ranges become obvious targets for an attentive opponent.
Key takeaways
- Blind versus blind is roughly one hand in five in 6-max.
- From the small blind, prefer raise-only with a larger sizing (3 big blinds).
- From the big blind, defend 55 to 70% and 3-bet wider than elsewhere.
- Postflop, ranges are wide and weak: moderate c-betting, small sizings, frequent check-raises.
- Rake penalises marginal hands and small blind limping.
- The spot is repetitive, which makes prepared range work pay off faster here than anywhere else.
GrindLab lets you build and save your blind versus blind ranges, run them across the textures typical of the spot, and compare what you actually played to what you had planned. Try it free during the beta →