This got me thinking about all the various ways that I have seen the HQ squares defined over the years from grid reference systems to compass-based systems and the thought that a common standard may facilitate discussions.
Whist it is understandably to refer to this as a grid reference (after all we refer to the board as a Quest Map) but for me personally the representation is really of the board, a map of the board rather than of the territory so to speak, so perhaps a common notation system would work better if it was based on a gameboard rather than a map system.
This lead me to searching for other standard notation for board games based on a square grid which led inevitably to Chess, the king of all board games (or queen)
Algebraic Notation (Chess): Naming the Squares
Each square of the board is identified by a unique coordinate pair—a letter and a number—from White's point of view. The vertical columns of squares, called files, are labelled a through h from White's left (the queenside) to right (the kingside). The horizontal rows of squares, called ranks, are numbered 1 to 8 starting from White's side of the board. Thus each square has a unique identification of file letter followed by rank number. For example, the initial square of White's king is designated as "e1".
So extending this and converting for HeroQuest that would become
Common Notation System: Naming the Squares
Each square of the board is identified by a unique coordinate pair—a letter and a number—from the Evil Wizard Player's point of view. The vertical columns of squares, called files, are labelled "A" through "Z" from left to right. The horizontal rows of squares, called ranks, are numbered 1 to 19 starting from edge of the board closest to the Evil Wizard Player (orientated as usual by placing the HeroQuest logo facing the EWP. Thus each square has a unique identification of file letter followed by rank number. For example, the bottom left square of the board would be "A1", top right would be "Z19"
Any thoughts, either on the value of a common notation system, or on this particular system?