Throughout the poem it can be appreciated that the authors are expert chess players as we should not be misled by the transcribed match. The notes in the margins of the verses represent the first rules of modern chess. The nomenclature used by the poets: law, decree, edict, and the content of the rules themselves strengthens this idea.

The rules established in Scachs d´amor (**):

• A piece touched is a piece played (verse 6).
• The jump of the King to the third square, i.e. the forerunner of current castling (verses 15, 18, 21, and 24).
• Check must be announced (verse 27).
• First description of en passant capture of a pawn (verse 39).
• How to end the game (checkmates: stalemate, stolen, and common; verses 45, 48, and 51).
• The first description of the movement of the queen (verse 54).

This proves that new chess is established at this very moment with the poets’ wish, as they announce early on in the poem, to create a piece with the same prerogatives as the King (in what appears to be a further reference to the Catholic Monarchs). Likewise they propose that losing the Queen means losing the match (verse 63).
 

(**) We will only consider here the rules of the greatest historical significance.