I want you to look at the rectangle in the middle of the board. It looks like rectangle, but it can be a square if you count tiles in it, 3 horizontally, and 3 vertically in each row and column. Can you see it ? Now, count pips in every row, column and diagonals of EVERY tile, not its halves. You will get exactly 15 pips. It is famous Luoshu Magic Square of order 3×3.
𝐃𝐎𝐌𝐈𝐍𝐎𝐒𝐀 