BlunderLens
Find the 3 chess mistakes you keep repeating, free
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Stuck at the same rating? Enter your Chess.com username. Stockfish checks your recent games in your browser and ranks the 3 mistakes you repeat most (blunders by phase, missed chances, thrown wins, time trouble), with positions, fixes and drills. Free.
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PH · launched Oct 20, 2026 · 1 upvote (top 67%)
- Media & entertainment
- Analytics & BI
- B2C
- Not AI
- Commercial product
- Web App
- Education
- Games
Similar launches
See all 109 similar launches →Could you build this?
Yes Stockfish compiles to WebAssembly and the Chess.com public API supplies game data, so the mistake-classification and drill UI is a wrapper around existing engines.
Competitors
Other products that read as similar to this one : 109 launches clear the similarity bar, closest 8 shown.
Attention rank: #43 of 110 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 356 days after the earliest competitor.
- ChessAnalysis · ph · 2026-10-19 · 2 upvotes · similarity 0.60
- ChessNextMove · ph · 2026-09-23 · 1 upvotes · similarity 0.55
- Chess X-Ray · ph · 2026-10-03 · 1 upvotes · similarity 0.54
- Blunder - Chess Scanner · ph · 2026-09-25 · 3 upvotes · similarity 0.54
- Memory Chess · ph · 2026-10-16 · 121 upvotes · similarity 0.52
- Blunderbase: A Personal Chess Database · hn · 2026-09-06 · 6 upvotes · similarity 0.50
- Oversky Chess · ph · 2026-10-17 · 1 upvotes · similarity 0.50
- See The Mate - Free Chess Analysis · ph · 2026-09-10 · 1 upvotes · similarity 0.48
Other launches for this product
- No other launches for this product.