I'm 18 and built TacticMax, a free offline chess tactics app
Offline-first chess tactics trainer with 154k puzzles built by an 18-year-old.

Chess puzzle new tab extension — clean design but others already do this.
Chess players wanting passive practice
Chess.com puzzles · Lichess studies · Chess Tempo
This is something I've wanted to build for awhile (first bought the domain in 2020 (then lost it for a year+)). It's a tactics solver on each new tab page.
There are 5 modes of play:
Easy (<1200 elo)
Medium (1200-1800)
Hard (1800-2400)
Expert (2400+)
Speedrun (solve as many puzzles as possible in 60 seconds).
I'm having a ton of fun with it, and definitely noticing improvements with actual games (definitely solved the most puzzles in my life while developing this extension).
If you check it out, please let me know what you think. Any feedback is good!
Offline-first chess tactics trainer with 154k puzzles built by an 18-year-old.
Yet another chess-new-tab extension, but pulls daily Lichess puzzles.
Automates the Woodpecker Method spreadsheet grind; chess training already crowded though.
Trains you to NOT look for tactics when none exist—genuine training gap.
Detects 10 tactical patterns without Stockfish—clever heuristics, tiny audience.
Chess-style Elo for coding practice, but the puzzles are just AI-generated snippets.