Thanks for that. Clears up the triangles nicely.
One last question, what about the cards that have no destination on them and just a black or white triangle on the bottom right?
They're only used on the 5x5 so the gaurd can travel to the bottom right hand corner or E5 otherwise they would have had to print the triangle over the number.
My friend and I making a new deck to play a 7x7 with all 3 guards and safes on one floor.