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Account
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Game accounts
Puzzles get mined from your recent games when set.
Knowledge
Pick a window and lines you haven't reviewed in that long slip back to “Kinda knows”, so course progress reflects what you can recall today. Leave it on Never and knowledge is permanent.
Accent color
Colors buttons, highlights, and the coach across the whole site.
Board theme
Board size — 460px
How large the board is on the training screens.