Spaced repetition learning feature

[Siderite]

It would work like this:

• player marks study chapters that will participate in the learning (maybe grouped in some way so people can choose one group as "active")
• chapters are being presented to the player for study one after the other
• some method of determining success (even asking the player how it went) will then increase/decrease/leave the interval until the same chapter will be presented
• if the learning did succeed, the interval will double
• if the learning fails after a success, the interval remains the same
• two consecutive failures lead to a halving of the interval

Still refining the idea

[Siderite]

Draft is working, but this needs work.

[Siderite]

Some inspiration: https://github.com/open-spaced-repetition

[Siderite]

Also linked to: https://github.com/lichess-org/lila/issues/14619

[Siderite]

Also: https://lichess.org/@/NewName420/blog/a-different-way-of-using-spaced-repetition-learning/dMBVku64

[Siderite]

See this: https://lichess.org/@/danbock/blog/11-things-i-did-to-take-my-uscf-rating-from-1547-to-1976/atiyFpHr

[Siderite]

See this: https://lichess.org/@/Avetik_ChessMood/blog/the-bold-unbold-technique-no-more-forgetting-what-you-learn/uuXRQZZj