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Type your handwritten chess scoresheet into ChessNotate for a clean PGN. It catches every illegal move and lets you fix it in place, not branch into a new variation.
Why build this
My son and I often play in chess tournaments, and after every tournament game I'd end up with a scoresheet with some typos and skipped moves. Most PGN tools either refuse to load anything invalid, or stop validating at the first bad move and leave the rest untouched. Worse, fixing a move gets treated as branching into a new variation instead of just replacing it, which is painful to untangle on a phone and ended up spending 1hour+ to fix it on my laptop. I built ChessNotate to fix the pain points. It doesn't just simply discard the moves after the first invalid moves and so you can still see the remaining moves and correcting a flagged move replaces it in place
How did the approach evolve
Initially the plan was to use OCR to capture handwritten notes with Apple VisionKit to avoid paying for a frontier model but it didn't work out. It only detected tables on a really good photo and it couldn't reliably parse fairly neat handwriting so I decided just to discard the OCR idea and focus on the core problem of making it easy to fix PGN instead
To make typing PGN easier on phone, ChessNotate has its own notation keypad to make it easy to enter the moves
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About ChessNotate on Product Hunt
“Fix your scoresheet, don't just validate it”
ChessNotate was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #82 on the daily leaderboard. Type your handwritten chess scoresheet into ChessNotate for a clean PGN. It catches every illegal move and lets you fix it in place, not branch into a new variation.
ChessNotate was featured in Board Games (5.4k followers) and Productivity (660.2k followers) on Product Hunt. Together, these topics include over 160.2k products, making this a competitive space to launch in.
Who hunted ChessNotate?
ChessNotate was hunted by Ronald Suwandi. 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.
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Ronald Suwandi