The answer is the easy part.
Ritsu teaches you the hard part.
Drop in the chapter or assignment. Ritsu pulls out an exercise and gives you three ways through it — solve it yourself and get graded, reveal the worked solution, or let Ritsu walk you to the answer one step at a time, without ever handing it over.
The answer-shaped shortcut
The answer was one click away. That was the problem.
An answer you're handed teaches you this problem. A solution you reach teaches you the next one — and only one of those shows up on the exam.
It's 11pm, the problem set is due, and the answer is one search away. So you look it up. The assignment gets done. That part works.
But an answer you were handed is worth nothing the moment the numbers change. You didn't learn the move — you learned that this problem equals that answer, which is a fact you will never need again. The exam doesn't reuse the problem. It reuses the method, and the method is the one thing a copied answer never contains. Chegg, Photomath, the solutions PDF — they all solve the problem and leave you exactly where you started.
There's a different way to be stuck-and-then-unstuck: don't look up the answer. Get walked toward it.
Three ways through a problem
You choose how much you want it handed to you.
01 · the path drawn for you
Just show me
Stuck and out of time? Ritsu reveals the full worked solution — every step, with the reasoning, and three takeaways so even the shortcut teaches you something. This is Chegg, done properly.
Let me try, then grade me
Write your solution and Ritsu grades it — not just right/wrong, but where your reasoning broke and how to fix it. Get it wrong, try again; your best attempt counts. Open a hint whenever you want, one at a time.
Walk me to it
The one no answer site offers. Ritsu breaks the problem into milestones and leads you through them — you produce each step, it tells you if your approach works (by any valid method, not just its own), and the answer only appears once you've reached it yourself.
Every mode ends the same way: the answer, plus what the problem was actually teaching you. Because getting it right once isn't the point. Being able to do the next one is.
Pedagogy, packaged
Solving is one command. Mastering the concept is six.
A solved problem proves you did this one. These six make sure you can do the rest — each asking more of you than the last.
Understand
The core idea first, then the layers — built from the problem set you just dropped in.
Recall
Retrieval practice: the most proven way to make it stick. Pull it back out, cold.
Drill
The parts that have to be automatic, turned into cards you'll actually run.
Explain back
The Feynman test. Say it in your own words — that's where the gaps show.
Apply
A real problem on the real concept. Knowing it and using it aren't the same.
Create
Write it out in full. The highest bar there is: if you can write it, it's yours.
And the Apply rung is /solve's sibling: /exercise writes a fresh problem on the same concept — so the ladder ends on the one thing a copied answer never survives: a problem you haven't seen.
That's Bloom's taxonomy, climbed one command at a time. And the science isn't a slogan — it's a flag on the command:
/quiz --bloom="auto"
40+ commands, all built like this.
Knowledge Map
You always know exactly where you stand.
A finished problem set tells you the assignment is done. It never tells you which problems you could do again cold, and which you only got through with help. Ritsu scores every concept as you work, so you know the difference.
Every concept, scored.
Not “assignment complete” — a mastery score per concept the problems tested.
Dim = you'd be stuck again.
The problems you only got through with help, named — so you drill those, not the ones you already own.
The whole set, one screen.
Which methods you've got, which you're faking — at a glance.
Spaced review
Solve it tonight. Still solve it on the exam.
A method you used once tonight is gone within days — Ebbinghaus measured it in 1885. Ritsu brings each one back right before it fades, so the problem you cracked this week is one you can still crack when it matters.
Five minutes tonight. Three tomorrow. Two in three days.
Built from your problem set — no cards to make.
When you're stuck
The moments you actually get stuck — and what to type.
This is the one no answer site offers. /solve --mode=guided breaks the problem into steps, lets you produce each one, tells you if your approach works — and shows the answer only once you've reached it yourself.
Problem Set 4 · Projectile Motion
climbed, not clicked
Stop looking up answers. Start reaching them.
Free forever · no card