One Piece Chapter 799

[Assertn]

Chapter 818.





so, there are four super special stone slabs that lead to one piece.
but why are there 4? you can do pretty good triangulation with three points, right?

Triangulation is using the trajectory of a third point with respect to the first two points. If Raftel was the third point, then that would mean you would only need to start with two points. Of course, you need a bit more info than just two points if the third point is hidden, like angles or distances.

Also, finding the intersection of 4 points marks an X on the map, which is thematically appropriate for One Piece.