# Pl. explain me blind structure for tournament

I understand that for a tournament you need a blind structure. I found example in PokerSoup.com. Here are the inputs they have used. No of players = 20. Tournament length 4 hours. Smallest chip denomination 25. Starting chips 5000. Round length 20. I though there would be 12 rounds as tournament length/round length, i.e. 4*60/20 = 12. But as per example there are 20 rounds. I am also assuming there is no time lost between rounds. Here is the link for the example: https://pokersoup.com/tool/blindStructureCalculator

• Is your question that you want to understand how blind structures work in general? Or are you confused by the number of rounds?
– Grinch91
Nov 3, 2021 at 14:05
• @Grinch91, I am confused by number of rounds. From the answer provided by BowlOfRed, it got clear that few more rounds are thrown in for just in case. Nov 4, 2021 at 3:48
• Look at this question which is about blind periods. poker.stackexchange.com/questions/11592/…
– Jon
Nov 5, 2021 at 5:06