Sudoku Portal 对比 QUBE Puzzle 的使用情况和统计数据

the objective of sudoku is to fill a 9 × 9 grid with digits so that each column, each row, and each of the nine 3 × 3 subgrids that compose the grid contain all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution. are you looking to solve some interesting sudoku look no more, enjoy solving exciting sudoku in a beautiful and relaxing environment where the Portal takes you to the highest pikes of sea cliffs and the coldest regions of the pole where Eskimos live build igloos, and rest their wooden sleds and the silent of desert canyon where you enjoy the base campfire and a full moon and wonderful waterfalls?