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347 points avadhesh18 | 1 comments | | HN request time: 0.2s | source

Hi HN!

I'm the developer of rdx, a mildly popular ad-free, privacy and user friendly Reddit client. This time, I made something for a very specific use case: solving chess puzzles with no internet.

Why? Well, my Wi-Fi is terrible in the bathroom—and that's where I do some of my best thinking. I tried printing out “mate in X” puzzles to solve offline, but they weren’t fun without interaction. So I built OffChess.

OffChess is an iPhone/Android app that contains over 100,000 chess puzzles, fully offline and completely ad-free. You can solve puzzles by category (Mate in 1/2/3/4/5, tactics like pins/forks/skewers, or openings like Sicilian/French, etc). You gain or lose points based on how you perform, so there's a light rating system to keep things engaging.

No accounts, no tracking, no monthly subscriptions, no internet required. Just pure, old-school tactical chess training, wherever you are.

You can check out the iPhone/iPad app at https://apps.apple.com/us/app/chess-puzzles-offchess/id67447... or the Android app at https://play.google.com/store/apps/details?id=com.offchess

Would love feedback, bug reports, or suggestions.

Thanks!

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chatmasta ◴[] No.44498855[source]
Awesome. I’ve never understood why Lichess limits the offline download to 50 puzzles.
replies(1): >>44498898 #
djexjms ◴[] No.44498898[source]
For what it's worth, the entire Lichess corpus of puzzles (over five million positions with solutions and theming tags) is available for download in CSV format at https://database.lichess.org/#puzzles
replies(2): >>44500225 #>>44506336 #
1. zippyman55 ◴[] No.44506336[source]
I downloaded this and wrote a small program to filter on 1, 2, 3, 4, and 5 move puzzles. I also segregated by rating. Then I ran them thru stockfish (there are some errors) and generated several years worth of daily puzzles. It’s part of a daily chess feed I have for my club. So, puzzles get harder thru the week, similar to NY times crossword puzzles. I uploaded this to my cheapo web server. I give credit to lichess and provide a link to play the position on the lichess.org website.