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This is Chloe's story

If you play The Hundred, you’ll notice two powerful effects:

  • It becomes surprisingly quick and easy to memorise new things.
  • What you learn stays with you much, much longer.

The diagram below shows this in action.

AI data diagram

The data comes from Spark, a simple prototype game built using the same unique approach as The Hundred. Over 10,000 players joined in, contributing millions of interactions. Chloe's diagram was calculated from more than 64,000 data points. The graph tracks one player’s learning journey across nine months—showing not just how fast she memorised information, but how long it stayed with her.

And here’s the exciting part: her journey didn’t stop after her knowledge was assessed in March.

She kept playing. A few more months. Just 40 extra minutes of quiz time, gently spaced by the AI. That small effort extended her memory dramatically. She began retaining information for 256 days—that’s an 18× improvement in memory longevity, achieved with less than 1 minute of effort per day.

Now imagine if she had stopped playing in April. By May, most of that knowledge would have faded. Eventually, she did stop in September, and sure enough, her memory began to decay. Not because she isn’t bright—she’s exceptionally capable—but because that’s how human memory works.

We all forget when we stop practising.

But just think—if she’d continued for just a little longer, with a few more well-timed pushes, she could have remembered those answers for a lifetime.

That’s why The Hundred is designed as a long game.

You can dip in for a few minutes a day, play off and on, and build up a solid base of knowledge over weeks and months. But if you keep going—keep swinging—you start unlocking the real power: long-term mastery. That’s when you’re sent flying.

In the graph, you can clearly see the rhythm:

  • On days she played, her memory score rose—fast.
  • On days she didn’t, forgetting set in and the curve dipped.
  • At the end of March, after consistent play, her memory soared to nearly 100. At that point, the AI was optimally timing the quiz questions, and the information stuck for around 14 days.

If she’d played without the AI’s support, that peak wouldn’t have reached even 60—and the memory would have faded in just 5 days.

With the AI, learning became faster, easier, and far more enduring.