99chess
A free chess coach that explains the plan, not just the move
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99chess is a free chess trainer with an AI coach. It explains what your move did and what the plan is — in plain words, like a human coach. Adaptive engine opponent, game review, puzzles built from YOUR mistakes with spaced repetition. No install, no card.
PH · launched Sep 21, 2026 · 1 upvote (top 69%) · 0 views
Niche: ai chess training platforms · 62 launches, 8 in the last 7 days ▲ +14% · Explore this niche →
Category and tags
- Education
- Agent / copilot
- B2C
- AI feature
- Commercial product
- Free Games
- Artificial Intelligence
- Games
Visit website ↗ Source listing ↗
More like this: all 62 launches in ai chess training platforms →
Could you build this?
Partial The UI and LLM integration are easy, but generating accurate tactical and strategic natural language chess explanations requires a tightly coupled Stockfish analysis engine, blunder detection heuristics, and opening book databases.
What it would actually take: The frontend runs Stockfish in a Web Worker via WebAssembly, parsing engine evaluations (eval, PV lines, depth) to identify tactical blunders, missed forks, and positional inaccuracies. A backend pipeline aggregates this structured engine telemetry and feeds it with board FEN/PGN state into an LLM via strict structured outputs to ensure tactical explanations do not hallucinate non-existent moves. The spaced repetition puzzle generator requires building an algorithmic mistake-extraction pipeline coupled with a modified SM-2 scheduling database.
Competitors
Other products that read as similar to this one : 158 launches clear the similarity bar, closest 8 shown.
Attention rank: #137 of 159 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 325 days after the earliest competitor.
- ChessMentor AI · ph · 2026-10-28 · 2 upvotes · similarity 0.61
- Chess Coach · ph · 2026-11-14 · 3 upvotes · similarity 0.61
- Wings Chess · ph · 2026-11-08 · 1 upvotes · similarity 0.60
- ZenAIya Chess · ph · 2026-10-25 · 2 upvotes · similarity 0.60
- Chess Coach · ph · 2026-11-10 · 1 upvotes · similarity 0.59
- knighttrace · ph · 2026-09-15 · 1 upvotes · similarity 0.57
- Chess Masterss · ph · 2026-10-08 · 2 upvotes · similarity 0.56
- Chessstack · ph · 2026-10-27 · 2 upvotes · similarity 0.53
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