Forget the big chip count on the poster for a second. The two numbers that tell you the most about a tournament are starting big blinds and minutes per level.
What a blind structure is
A tournament's blind structure is the schedule of forced bets. The small blind and big blind go up every level, on a clock. Level 1 might be 100/200, Level 2 150/300, Level 3 200/400, and so on. Your chips don't change when the level changes, but what they're worth in big blinds drops every time.
That's the whole engine of a tournament. The rising blinds force action, shrink stacks and eventually push everyone into all-in decisions.
Convert chips to big blinds
Stack ÷ current big blind = stack in big blinds.
| Stack | Blinds | Big blinds | What changed? |
|---|---|---|---|
| 20,000 | 100/200 | 100 BB | A deep start |
| 30,000 | 100/300 | 100 BB | Also deep |
| 30,000 | 300/600 | 50 BB | Same chips, half the depth |
| 30,000 | 1,000/2,000 | 15 BB | Decisions get much more compressed |
Rough guide to what those numbers mean for your play: at 100 big blinds you can see flops, fold to raises and play real post-flop poker. Around 25 to 40 big blinds you're mostly raising or folding preflop, with some re-shoves. Under about 15 big blinds, most of your decisions are shove or fold.
Level length changes everything
A tournament with 20-minute levels climbs the blind schedule twice as fast as one with 40-minute levels. Two events can both hand you 30,000 chips and play completely differently.
Live, a dealer gets through something like 25 to 30 hands an hour. So:
- 20-minute levels: roughly 8 to 10 hands per level.
- 30-minute levels: roughly 12 to 15 hands.
- 40-minute levels: roughly 17 to 20 hands.
More hands per level means more chances to wait for a good spot before the blinds jump again. That's the real meaning of a "slow" structure.
Antes
Once the ante kicks in, the pot gets bigger before anyone acts, and sitting back costs more. Many live events now use a big blind ante: the player in the big blind posts one ante for the whole table, instead of every player putting in a small ante.
Example: at 100/200 with a 200 big blind ante, there's 500 in the pot before the cards are dealt. At a ten-handed table, one full orbit costs you 500 chips. With a 20,000 stack you could fold for 40 orbits before you're out, but at 400/800 with an 800 ante, one orbit is 2,000, and the same 20,000 lasts just 10 orbits.
A current Ontario example: Casino Niagara Fall Main Event
Casino Niagara's published 2026 Fall Main Event structure uses a 35,000 starting stack, 30-minute levels on Day 1 and 40-minute levels on later days. That tells you much more than the 35,000 figure by itself. Day 1 moves at a normal pace; the longer later levels give you more hands per level once the stacks are deep in play. See the tournament calendar for the dates.
What to look for on a structure sheet
- Starting stack and the first big blind
- Minutes per level
- Size of each blind jump
- When the ante starts and how it's posted
- Break schedule
- When late registration closes
- Level length on Day 2 for multi-day events
Watch the jumps too. Going from 200/400 to 300/600 is a 50% increase. Going from 200/400 to 400/800 doubles the blinds in one step. Bigger jumps make the event play faster than the level length alone suggests.
For beginners
You don't need to memorize the whole sheet. Recalculate your stack in big blinds after every blind increase and every break. That one habit tells you whether you have time to wait or need to start taking spots. If you're newer to tournaments, your first live tournament covers the rest of the day.
Quick answers
What is a blind structure in poker?
It's the schedule showing how much the small blind, big blind and ante are at each level and how long each level lasts.
What is a good blind level length for a live tournament?
Longer is slower. 30 to 40 minutes gives you more hands per level than 20-minute levels, which move twice as fast as 40-minute ones.
What is a big blind ante?
A single ante posted by the player in the big blind on behalf of the whole table, instead of every player posting their own ante.
Related: Starting stacks · Late registration · Cash vs tournament strategy · Preflop strategy
By the TorontoPoker.org editorial team · Updated September 2026 · 19+ · Play responsibly