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What Is a Grid?
A grid is a network of lines that cross each other to make squares, like a checkerboard. Maps use grids to help you find exact locations.
Grid coordinates use a LETTER for the column (left to right: A, B, C, D...) and a NUMBER for the row (bottom to top: 1, 2, 3, 4...). To find a spot, you read the letter first, then the number. So B3 means: go to column B, then up to row 3.
This is the same system used in chess (the knight is on E4!), spreadsheets (cell B7), and even battleship (Hit at C5!). When you learn grid coordinates, you unlock a skill used everywhere!