Sudoku is one of the most popular puzzle games of all time. The objective of Sudoku is to fill a 9-by-9 grid with digits from 1 to 9 such that each column, row, and box (or called "subgrid", "region", ...
Using this widget, any data point with JSON data can be displayed as desired. The display is done using a template format, which can be thought of as a combined form of HTML code + JavaScript + CSS + ...