This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Product upvotes vs the next 3
Waiting for data. Loading
Product comments vs the next 3
Waiting for data. Loading
Product upvote speed vs the next 3
Waiting for data. Loading
Product upvotes and comments
Waiting for data. Loading
Product vs the next 3
Loading
Chess Lines
Chess openings with spaced repetition right in your browser
Chess Lines is a Chrome extension that drills your opening repertoire using spaced repetition. Practice move-by-move, get quizzed at the right intervals, and actually retain the lines you study. Works 100% offline — no account, no sync required. Free plan includes 6 lines. Lifetime upgrade ($10) unlocks all 86 lines across 23 openings for both White and Black.
Hey Product Hunt! 👋
I built Chess Lines because I kept forgetting opening lines between study sessions — I'd learn a variation, feel good about it, then blank the next day at the board.
The extension applies SM-2 spaced repetition (the same algorithm behind Anki) to chess openings. You practice move-by-move, and the extension schedules your next review based on how well you did. Lines you struggle with come back sooner. Lines you know cold space out further.
A few things I'm proud of:
Works 100% offline after install — no account, no API calls, nothing phoning home
86 lines across 23 openings covering the most popular systems for both colors
Free to start — 6 lines unlocked immediately, lifetime upgrade is $10
Would love feedback from the chess community here. Sometimes you just need a line!
About Chess Lines on Product Hunt
“Chess openings with spaced repetition right in your browser”
Chess Lines was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #86 on the daily leaderboard. Chess Lines is a Chrome extension that drills your opening repertoire using spaced repetition. Practice move-by-move, get quizzed at the right intervals, and actually retain the lines you study. Works 100% offline — no account, no sync required. Free plan includes 6 lines. Lifetime upgrade ($10) unlocks all 86 lines across 23 openings for both White and Black.
On the analytics side, Chess Lines competes within Chrome Extensions, Education and Games — topics that collectively have 229.7k followers on Product Hunt. The dashboard above tracks how Chess Lines performed against the three products that launched closest to it on the same day.
Who hunted Chess Lines?
Chess Lines was hunted by Chess Lines. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Chess Lines including community comment highlights and product details, visit the product overview.
Chess Lines