How far the engine looks when it evaluates one position you're looking at — the bar beside the Explorer board, and the line shown when a puzzle is revealed. It has nothing to do with scanning your games; that's the two depths below. Deeper is slower but steadier.

Optional. The live Player / Lichess / Masters tabs go through our server by default. A personal token (no scopes needed) skips that queue. Stored on this device only, never synced.