规则Rules：
标准数独基础上，涂色的单元格组成了若干个三角形（上方一格，下方两格）。每一个三角形结构中，顶端的数字是下方两个数字的和或差。
Classic rules applied. Additionally, the colored cells form several triangles (one cell above and two cells below). In each triangle, the number in the top cell is the sum or difference of the two numbers in the bottom cells.
