(1) 完全宫 Complete Boxes
这类题目里,每个宫里包含了1~N的所有类型数字,且每个数字仅出现一次。In this type puzzle (in NxN puzzle), each Box contains all kinds of numbers of 1~N, and each number only exist once.
(2) 不完全宫 Incomplete Boxes
这类题目里,一部分宫里包含的数字数和题目阶数不等。In this type puzzles (in NxN puzzle), several Boxes doesn't contain N numbers.
✿拉丁方Latin Square