e4 logo

e4

Open Source

A tiny, no-fuss chess board that thinks right alongside you. You play your side, it whispers a strong move whenever you want one.

About

A tiny, no-fuss chess board that thinks right alongside you. It's your personal coach. You play your side, it whispers a strong move whenever you want one - all in your browser, no sign-ups, no nonsense.

Named after chess's most famous opening move. (Yes, the pun is on purpose.)

The 'brain' is Stockfish, one of the strongest chess engines on the planet, shrunk down to run on a web page.

Features

  • Hints for your side, a little arrow points you toward a strong move whenever you're stuck
  • Follow any game, enter your opponent's moves yourself and keep getting nudges for your replies
  • A real engine in your pocket, Stockfish runs right inside your browser
  • Five difficulty levels, from "gentle nudge" to "okay, it's actually good now"
  • Rewind anytime, step back and forth through every move you've played
  • Themes & dark mode, make it feel like yours
  • Satisfying click-clacks, sounds for moves, captures, and checks
  • Phone or laptop, it just fits

Stack

  • Next.js
  • TypeScript
  • Tailwind CSS
  • GitHub Actions
  • Cloudflare Pages

Info

Platform
Web
Visit the siteView the code