Guides

How the picks are made, what the numbers say, and how to run a draw that people can check.

• Is an online wheel spinner really random?Three things decide whether a wheel spinner is fair: where its random numbers come from, how they are turned into a slot, and whether the animation decides anything. Here is how Pickboard handles each.
• How to pick winners from a list without repeatsA short, checkable way to draw several winners from a list: clean the list, draw once, keep alternates, and share a link that replays the result.
• Ladder lottery (Ghost Leg): how it works and how fair it isA ladder lottery always gives everyone one result, but with a normal number of rungs people tend to land near where they started. We measured how much, and what fixes it.