Once you have gotten bored with traditional sudokus , you can go looking for the innumerable variants : some overlap multiple grids ; others replace square subgrids with other structures ; still others introduce additional constraints 如果你開始覺得標準數(shù)獨無聊了,還可以試試數(shù)都數(shù)不完的變種數(shù)獨,有些游戲把好幾個數(shù)盤疊在一起;有些用別的結構換掉方形的宮;還有一些加入更多的限制條件。