Lichess Puzzle Timer, by Eltecson por eltecson.dev

(also available on Android)
(also available in the Chrome Web Store)

Lichess Puzzle Timer is a lightweight extension designed to help chess players train faster, smarter, and more consistently on Lichess puzzles in any device.

Built directly into the Lichess puzzle page, this extension adds a real-time puzzle timer, automated puzzle flow, and performance analytics—no external tools, no accounts, no clutter.

Perfect for players focused on speed chess, tactics training, blitz improvement, and puzzle-solving rhythm.

• Real-Time Puzzle Timer
  Track how long you take on every puzzle with a clean, floating timer popup that you can drag and resize.
• 2 Modes for Timer:
• Per-Puzzle Mode: Resets the timer after each puzzle.
• Cumulative Mode: a set amount of time. With the additional feature of automatically stopping when a puzzle is solved, and automatically resuming when a new puzzle is loaded.
• Any motif, any difficulty, adjustable time
  Will work in any motif, any difficulty (Lichess has built-in selection for difficulty), adjustable time. Basically as long as it has a puzzle board, it will work.
• Automatic Puzzle Detection & Skipping
  Instantly detects puzzle completion and out-of-time scenario and smoothly advances to the next puzzle.
• Settings Page
  Easily customize everything through the chrome extension's settings page (accessible through clicking the Timer Popup's Settings Button, Menu Popup's wide logo, and the extension's default_popup's wide logo).
• Timer Presets for different Time Controls:
  Very Fast – 10s time control / 3s cooldown (Ideal for Bullet)
  Fast – 20s / 3s (Ideal for Blitz)
  Normal – 60s / 3s (Ideal for Blitz and Rapid)
  Slow – 2m / 5s (ideal for Rapid)
  Very Slow – 5m / 15s (Ideal for Rapid and Classical)
• Analytics Popup
  Check your total puzzles, accuracy, total solved and unsolved puzzles in real-time.
• Customizable Visuals & Sounds
  Toggle timer visuals
  Adjustable volume
  Optional sound effects
  Light Mode preset available
• Smart, Safe Integration
  Uses safe DOM interaction
  Only runs on Lichess puzzle pages
  No tracking, no accounts, no unnecessary permissions

Lichess Puzzle Timer helps you:

• Improve tactical speed
• Improve time discipline
• Build puzzle-solving discipline
• Develop a consistent training rhythm
• Practice under realistic time pressure

Ideal for blitz players, bullet grinders, and tactical trainers who want a focused puzzle workflow.

• Added suport-me links and buttons

• Change all instances of "el-tecson" to "eltecson" and "El-Tecson" to "Eltecson"

• Reset isFailedPuzzle ref on timer cancel
• Turn off all intervals and animation loops on timer cancel
• Make review link lead to firefox addon when using firefox browser

• No ads
• No tracking
• No external accounts
• Minimal permissions

Source code available on GitHub:
👉 https://github.com/eltecson/lichess-puzzle-timer/