Rating sync

Where it shows up

Rating sync in practice

Rating sync is separate from game import, though both run when a linked account syncs. Importing brings in public games; the rating fields hold the account's blitz, rapid, bullet and classical ratings, and Chess.com's daily rating is stored in the classical slot because Chess.com has no classical rating. Each sync can add one snapshot to the history, chosen from rapid first, then blitz, bullet and classical, and Lichess snapshots also carry a rating deviation. Both integrations are read-only, and both can sync automatically; those describe different properties, not opposites. Automatic sync starts on the Pro plan and up. Keep the source and time control beside every number, because Lichess and Chess.com rate players in separate pools and Lichess says ratings cannot be compared directly between servers. If a student changes username or platform, keep each source and time control separate and treat any estimated conversion as approximate, never as an official or FIDE rating. Unlinking a username stops future syncs, and the games already imported stay in the student record.