Independent clubs
One teacher, a teaching room, and a steady group of students. C3NTR puts your topics, exercises and notes in one place.
For academic schools
A knowledge home for your chess club.
Openings, tactics, endgames and the long study of the game
→ Explore the features
Free for up to 10 students
No credit card
Data stored in London
Works offline
Your club's curriculum deserves a home
Opening variations get explained mid-game and forgotten by next session. Tactical themes get drilled but rarely written. Tournament games sit on chess.com or lichess but the lessons never make it back. C3NTR is a quiet place to write it all down once, in your club's voice.
Who this is for
Clubs with multiple teachers
Two or more teachers teaching the same subject. C3NTR holds the shared standard so every class draws from the same library.
Clubs preparing for tournaments
You're training competitive players. Content locked by rating keeps newer members on principles while higher-rated players see deeper preparation.
Built for teachers, not for IT
Your teacher opens the app, taps Edit, and writes the next opening idea in plain prose. The next club night, players arrive knowing the move.
Write directly in the app
Like a notepad. New articles are drafts until you publish, so nothing goes live by mistake.
Mobile-first authoring
Edit on the phone between classes or on the way home. The same library, the same edit screen.
A working library in under an hour
Import the starter template in a few taps. Edit anything that doesn't fit. Publish when ready.
ECF / FIDE ratings, your club's grouping
Content locked by level, in your club's progression
Tag any article with a minimum level. New players see opening principles. Intermediate see tactical themes. Stronger players see strategic plans and endgame technique. The same library, the right view per student.
A glossary of chess terms
Chess has its own vocabulary. C3NTR's glossary holds the terms in one place: the technical names, your club's definitions, and the article each term appears in.
- Check
- The state of a king under direct attack by an enemy piece, and the announcement of that attack.
- Checkmate
- The end of the game, a position where the king is in check and there is no legal move that escapes it.
- Castling
- A special move that brings the king to safety and develops a rook in a single move, the only time two pieces of your own move at once.
- Fork
- A single piece attacking two or more enemy pieces at the same time.
- Pin
- A tactical pattern where a piece is attacked along a line, and moving it would expose a more valuable piece behind it.
- Zugzwang
- A position, almost always in the endgame, where the player whose turn it is would prefer not to move at all, because any legal move worsens their position.
Tournaments, club nights, lectures
C3NTR isn't only the library. Schedule the next tournament, post club night dates, and let members see what's ahead. Announcements land on their Today tab and events sit on the calendar.
Start from our Chess template
A working starter with 14 articles, 2 short videos, a 8-terms glossary across 5 tags (Getting Started, The Pieces and the Board, Tactics, Strategy and Endgame, Playing and Studying). Import in a few taps, then edit anything that doesn't fit your school. Every article, term and tag is yours from the moment you import. You will find it in the app when you set up your school.
Start free for your schoolInside the app
A look at how the library, articles and grade controls feel in your students' hands.
Bring in what you already have
Bring your existing lesson notes and exercises in with smart Word document import or paste Markdown directly from your club's archive.
Word documents
Smart import reads headings and turns them into draft articles. You review before anything publishes.
Markdown from any editor
Notion exports, Obsidian notes, Bear, plain .md files. Paste or import.
C3NTR templates
An open template format. Schools can share templates with each other without us in the middle.
Privacy
Private to your school. Stored in London.
Your school's knowledge stays with your school. This is how C3NTR looks after it.
Stored in London
Your school's data is stored in London, on Google Cloud.
Private to your school
Content reaches only your school's own members. There is no chat or open messaging between members, and no public profiles.
No ads in the app
The app has no ads, no advertising ID, and no analytics or attribution tools built in.
Report or hide anything
Every item in the app can be reported or hidden, with Report or block.
What C3NTR is, and what it isn't
A library your school owns
Another booking or billing system
Built for how schools actually teach
A generic course builder
Calm, focused reading for students
A feed competing for attention
Start free. Move up when you outgrow it.
Seed
Free forever
Up to 10 students
Core library, branding and stock photos. No credit card.
Start freeSchool
£39/mo
or £384/yr — two months free
Up to 100 students
Video and audio. Push notifications. Advanced analytics. 5 GB media storage.
Choose SchoolAcademy
£69/mo
or £684/yr — two months free
Unlimited students
Multi-instructor publishing. Priority support. 10 GB media storage.
Choose AcademyStudent? Show this to your teacher.
If you study chess and you'd love a quiet library you can return to between sessions, share this page with your teacher. Most clubs start on the free Seed plan in under five minutes.
Common questions
Can students only see their level's material?
Yes. Tag any article with a minimum level. New students see only foundations. Teachers see everything.
Does it cover FIDE, ECF (UK), USCF, your federation?
Yes. The starter is curriculum neutral. FIDE, ECF (UK), USCF can adapt without rewriting.
Can my club customise the chess template?
Yes. Every article, exercise and term is editable. Add your club's curriculum, your favoured exercises and your house standards.
How long does it take to set up?
Most schools have a working library in under an hour. Import the starter template in a few taps, then edit anything that doesn't fit. Starting blank takes a little longer. Allow an hour or two to write your first ten articles. Students can use the app the day you publish.
Do I have to stop using my booking system?
No. C3NTR is a knowledge library for your curriculum, terminology and progressions. Booking, billing and scheduling stay with the tools you already use.
Is there a free plan?
Yes. Seed is free forever for up to 10 students, with no credit card required. Move up to School (£39/mo) or Academy (£69/mo) when you outgrow it.
Other academic disciplines
Teach a different style? Tell us.
Whether it's a specific chess lineage we don't list, or another discipline entirely, drop us a line and we'll add a starter template. In the meantime, the app already works for any structured curriculum, your library starts blank in a few minutes.
Ready to give your chess students a knowledge home?
Free for the first 10 students. No credit card. A working library in under an hour.
Start free for your school