ChessTempo

ChessTempo is one of the longest-running chess training platforms on the web, built by a developer named Richard who wanted a better way to practice tactics. With over 2 million registered users and more than 1.1 billion problems served, it has quietly become one of the most data-rich training environments available to chess players at every level.

The platform is best known for its tactics trainer, which draws from a library of over 400,000 problems. But ChessTempo goes well beyond puzzles. It offers opening repertoire training with spaced repetition, 17,000+ endgame positions to practice against the computer, a "Guess the Move" mode for studying master games, interactive chess books from publishers like New In Chess and Quality Chess, and a game database with over 5 million games.

ChessTempo runs on a freemium model. Free accounts get daily access to tactics, endgames, and openings with some limits. Paid memberships (Silver, Gold, Diamond) unlock higher problem quotas, deeper attempt history, bulk PGN downloads, and access to more advanced training features. The platform is available on web, iOS, and Android.

What sets ChessTempo apart is its focus on serious, measurable improvement. The rating system for puzzles is well-calibrated, the problem selection adapts to your level, and the training tools are designed for players who want structured practice rather than casual play. If you are looking for a no-nonsense training tool with a deep problem set, ChessTempo is hard to beat.