How it works
- You get a position and play the best move on the board. The reply comes at once, until the line is finished.
- Solve a puzzle and the next one is harder. Miss it and the next one is easier. The puzzle rating follows the same idea as a chess rating.
- You can choose puzzles by tactical theme or level, or by the opening they came from.
- Five puzzles a day are open to everyone. A free account removes the limit and adds a rating, streaks and a list of puzzles to retry.
Where the puzzles come from
The puzzles come from the Lichess open puzzle database, which is released into the public domain. Each position was reached in a real game, and each solution was checked by a chess engine before it was published there. ChessBoost keeps the well-rated puzzles and adds the grouping, the trainer and the explanations.
The numbers on theme and opening pages, such as how often a tactic appears in an opening, are counted from the puzzles in our own database.
ChessBoost is not affiliated with Lichess.
Who runs it
ChessBoost is operated by PulseLab.media, a brand of iCyber AB, a media company in Stockholm, Sweden (company number 559194-2221). The site is free to use. See the Privacy Policy and the Terms.
Contact
Questions, corrections and ideas go to [email protected]. Coaches and school clubs are welcome to write about what they need.