I always think of Stones, it is my economic action. I know it is played with the skill, and that needs to be taken into account - with the way the game is played.
I know that Black stones are the highest count, red are the middle, and white the least - so we can assume it is three, two, one, in value.
I thought, the game could be played by removing stones from the board, in catchments.
You place stones on the mat, and make squares with one piece missing - and you can remove stones from the purse, by completing a square of the same colour, removing that stone into your own tally, (Not the whole square, the catchment remains in place.)
One could also toggle the colour of the stones; red on black making white, white on black making red, black on black making a space - all those excess stones are placed back in the purse, hidden from view.
I also decided that Black stones are folk, Red are skill users, and White are royalty, and that it is a killing game.
So, the aim of the game is to remove pieces from the board, and the player with the highest tally wins when a colour runs out from the purse.
It also makes sense, if Fitz were to try to solve a puzzle, that the mat would be a map of heroes and historic events, and Fitz would have to use his stones to create a good outcome.
Can someone recite to me all the information from the book, so I can check if I'm right?