Wikipedia:Articles for deletion/Chess diagram
It is easy to find sources which talk about such diagrams in detail.  For example, see ''https://books.google.co.uk/books?id=QwiPBAAAQBAJ&pg=PA123 Resemblance and Representation''.  The worst case would be merger into another page such as chess notation.  Please see |alternatives to deletion
— user:Andrew, 17:46, 27 November 2015 (UTC)
Stance: keep
Cited policy: WP:ATD (Wikipedia:Deletion policy)