I believe David Pritchard has consistently used a Cartesian coordinate system for hexagonal boards whereby the axes are kept at right angles and one of them goes along diagonal lines. [Edit: See Boards based on hexagons in the Classified Encyclopedia of Chess Variants.]
I believe David Pritchard has consistently used a Cartesian coordinate system for hexagonal boards whereby the axes are kept at right angles and one of them goes along diagonal lines. [Edit: See Boards based on hexagons in the Classified Encyclopedia of Chess Variants.]