Guides & Articles
Original documentation for the free browser game 67 Speed Challenge—written by the developer who built the on-device MediaPipe pipeline, scoring engine, and training notes. Thin duplicate posts were merged into deeper guides for clearer reading.
精選深度文章：追蹤原理、燈光實驗、計分公式、七天訓練與安全須知。新手上路請先看 什麼是 67、 怎麼玩、 鏡頭設定。
What Is the 67 Hand Challenge?
Trend context, house rules, and how the free browser game turns a meme into a 20-second scored test.
How to Play (Beginner Guide)
Permissions, webcam & keyboard setup, first-session plan, and the mistakes that kill rep counts.
How MediaPipe Works Here
Developer notes: landmarks, peak–valley detector, combo RPS bands, privacy, and device performance.
Lighting, Framing & Troubleshooting Lab
Merged setup lab: light experiments, desk ergonomics, motion tips, and a fix flowchart for missed reps.
Combo & Scoring (Engine Numbers)
Exact thresholds and points-per-rep so you train density, not just panic speed.
Keyboard vs Webcam Modes
What each mode measures, fairness, accessibility, offices/schools, and when to switch.
7-Day Plan + Sample Training Log
Day-by-day structure, sample scores, plateau fixes, and a copy-paste log template.
Wrist Care & Family Guide
Warmups, session limits, red flags, and guardian guidance for camera play.
Fair Play & Leaderboards
Community expectations, anti-automation rules, and how to request score removal.
Ultimate FAQ
Quick answers on setup, scoring, privacy, kids, browsers, and support links.