Speaking of rules, I took a look at your rules for Seireigi, and noticed that the image for the Great Elephant's move diagram is not lined up with with the piece's actual move. The current image shows a (disconnected) dot two spaces ahead of the piece, and no backwards diagonal step. There should be a dot on all spaces adjacent spaces except the one directly behind the piece, along with the two ranging moves.
Speaking of rules, I took a look at your rules for Seireigi, and noticed that the image for the Great Elephant's move diagram is not lined up with with the piece's actual move. The current image shows a (disconnected) dot two spaces ahead of the piece, and no backwards diagonal step. There should be a dot on all spaces adjacent spaces except the one directly behind the piece, along with the two ranging moves.
The Jocly implementation has the correct move.