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ds1
7,627 PointsAbout CELLS
Just a helpful note to others about the CELLS list:
3 Answers

ds1
7,627 PointsOops, rather (4, 4) is (column 5, row 5) since we start with (0, 0).

ds1
7,627 PointsSo think of (4, 4) as (column 4, row 4) in a spreadsheet.

ds1
7,627 PointsDon't think of these tuples as on a X & Y axis (Cartesian coordinate system). Be sure to think of them as rows and columns. i.e. (4, 4) is like row 4 in column D of a spreadsheet... NOT the coordinate x = 4, y = 4. Don't get confused like I did!

Binyamin Friedman
14,615 PointsI disagree. I think for movement purposes and calculations, it is much easier to think of them as a coordinate system of whole numbers.