What is the LRN file format?
A file with the .LRN extension is a file known as Apple Chess User Data. It belongs to the Game Files category. This format is associated with Apple, Inc..
The reliable way to open a .LRN file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .LRN files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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