# SuperMemo 2 Algorithm
[[Spaced repetition]] algorithm used by SuperMemo, Anki, invented by Piotr Wozniak.
## Links
- [What spaced repetition algorithm does Anki use? - Frequently Asked Questions](https://faqs.ankiweb.net/what-spaced-repetition-algorithm.html) - How [[Spaced repetition]] is used in [[Anki]]
- Original algorithm: See [SuperMemo.com](https://www.supermemo.com/en/archives1990-2015/english/ol/sm2)