C1 · LEARNING ENGINE · TARGET MASTERY · LANGUAGE DEPTH
C1 Review Arcade
Build nuance, precision and natural C1 English.
🎯 Recommended for you
Start exploring
Play a quick run and the arcade will learn which areas need the most practice.
Recommendations use only your saved activity on this device.
LEARNING ENGINE
Find my starting point
A 36-question balanced snapshot samples Bridge, Core and Depth in every world. It tunes recommendations; it is not a formal CEFR test.
180 calibrated language targets30 C1 error families1440 calibrated practice items
No diagnostic yet. Your normal play already contributes to target mastery.
SMALL REAL-USE PILOT
🧪 Run the 24-question pilot
A stable sample: two questions from every world, with recognition and production both represented. Use a code, not a name; results stay on this device until you export them.
12 worlds12 recognition12 production~15–25 min
No pilot run on this device yet.
📅
TODAY'S CHALLENGE
Daily Challenge
10 fixed questions for today · unseen and review material mixed together.
🔥 0-day daily streak
Today's practice goal0 / 20
The daily challenge changes with your local calendar date. Missing a day never removes XP or mastery.
🎯 Daily missionsThree small goals · +20 XP each · reset daily
CHOOSE YOUR GAME
How do you want to train?
Three content layers and specialist language labs — all feeding the same adaptive C1 profile.
Every world stays open. Clear language, collect cards and defeat bosses in any order.
LANGUAGE VAULT
Collect useful C1 English
Correct C1 Core/Depth answers can become Language Cards. The collection is revision, not currency.
🗃️ Open the 12 albums8 cards per world · 96 total
SMART MASTERY
My C1 profile
Your profile combines accuracy, repeated success, confidence, memory pressure and production evidence. It is a practice map, not a formal CEFR score.
🕸️ Skill radar
Eight overlapping dimensions show the kind of language control you are building.
🪜 Mastery ladder
Language targets move up and down as you meet them through different questions. Confident mistakes are treated as misconceptions; guessed correct answers need confirmation.
New
Learning
Familiar
Strong
Mastered
🧬 Error fingerprints
Recurring error families are more useful than one overall percentage.
🧠 Adaptive Learning 2.0
The arcade separates memory pressure, fragile mastery, production gaps and recurring error patterns before choosing what to show next.
Best next movePlay a few questions and the coach will become more specific.
Local-first heuristic: recommendations use only this device's practice history. Memory pressure is a review heuristic, not a measured probability of recall.
TROPHY CABINET
Achievements
0 unlocked · achievements add arcade XP but never change CEFR status.
Topic 1Skill
🔥 0×1.0⏱️ 90s❤️❤️❤️❤️❤️
1 / 15
0pts
GrammarChooseC1NewNew target🎯 0%
How sure are you?optional · affects mastery, not correctness
Choose one item on the left, then its match on the right.
💡 Why?
The explanation describes the English rule being practised.
✨ Bad → Good → Great
Keyboard: 1–4 / A–D answer · Enter next · R read aloud
Game complete!
Persistent Mistake Bank
A saved mistake is mastered after you answer it correctly in two separate game runs.
📊 Review & study mapSkill mastery, coverage and study ideas
Review map
Calibrated bank: 288 Bridge · 432 Core · 720 Depth items. Adaptive Mix now uses local accuracy, confidence, review timing and response friction while keeping the audited 1,440-item bank intact. v1.5 accessibility and international-UX release.
Skill mastery
Based only on questions you have already answered.
⭐ My English0
Star useful words, chunks and model answers while you play. Practise them later as a personal mini-bank.
🔖 Saved examples0
Save useful questions and rules while you play. They stay on this device and are included in progress exports.
Study ideas
Solo arcade: play 10–15 questions, then use Weak Spot Trainer or the persistent Mistake Bank.
Pair mode: one partner reads the question aloud, the other answers. Swap roles after each boss.
Group challenge: play on a shared screen and award one point for the answer and one point for explaining the rule.
Independent C1 grammar, vocabulary and language-use practice · v1.9.0 Pilot Operations release. Arcade rank, speed scores and streaks are in-app game markers, not CEFR assessments. The content benchmark is broad C1-level control, nuance, discourse, register and precision; the arcade is designed as broad language practice rather than exam-format preparation.
SMART RANDOMIZER
🎲 Spin the Arcade
Not purely random: the wheel quietly favours useful next steps from your saved progress.
▼
Click the centre or use the button below. The pointer decides where the wheel lands.
Ready when you are.
🎮
THE WHEEL CHOSE
Arcade Mix
Possible results change with your progress. Weak areas, due review and unfinished practice get extra weight; wild-card modes appear occasionally.
PILOT PROTOCOL · C1-PILOT-24-v1
🧪 Pilot setup
Set an anonymous role/code, then run the same balanced 24-question sample used by other testers.
This labels flags and exports; it does not change scoring.
Use a short code, not a name or email.
What this pilot samples
24questions
12worlds
12 + 12recognition + production
5 / 7 / 12Bridge / Core / Depth
Privacy: the pilot is local-first. Nothing is sent anywhere automatically. Export the pilot report JSON only when you choose to share it. The report uses the anonymous code above and includes item-level attempts, flags and your end-of-run debrief.
PILOT DEBRIEF
🧪 How did that feel?
Three quick ratings plus an optional note make the exported pilot report much more useful.
Saving this debrief keeps it locally. Use “Export pilot report” afterwards to create the JSON file to share with the project owner.
Arcade settings
Saved on this device. Good for phones, tablets and shared screens.
Navigation can follow your device language. English learning content stays in English.
Used by normal game modes. Quick Play always starts a 15-question run.
High contrast strengthens borders, text and controls without changing learning content.
Turn these off if they conflict with speech input or assistive technology. Tab and Enter still work normally.
Uses the English voices available in this browser/device.
Short locally generated cues only. No music or external audio files.
Optional short vibration cues on supported phones/tablets. Off by default.
💾 Data & progress
Your learning history is stored locally. Export a backup before clearing browser data or moving to another device.
PILOT & QA
🧪 Pilot Review Centre
Local tester workflow for reviewing item fairness and calibration. Signals describe this device only; they are not cohort-level difficulty statistics.
Select an item from the queue.
Its question contract, local learner signals and editorial workflow will appear here.
Review status, notes and candidate accepted answers are stored locally and included in progress backups and QA-log exports. Candidate answers do not alter the live answer key.