How Sparring Chess works
Studying openings is hard. It is harder without someone to practice them against. Your sparring partner answers with the moves real players choose, and every move you make gets a verdict straight away.
1. Play the line on the board
A line is waiting for you. Play what you would play in a real game; pick another line whenever you like.
2. Read the verdict
One word from the engine (best, good, inaccuracy, mistake, blunder) and one sentence of context: how club players score with that move, or how it has gone in your own games.
3. Beat your score
Each practice ends with an accuracy and up to three stars. Practice again to improve it, keep your streak and earn your next belt.
4. Make it yours (free account)
Create your own lines, import your Lichess or Chess.com games, upload your repertoire as PGN, and connect Lichess to spar against live statistics at the rating you choose.