缺门和 BlackOut Sum
填入1~N,使得每行、列、宫内数字不重复。其中黑色格不需要填入数字。黑色格中的提示数,表示该格所在的行、列、宫内,缺失的所有数字的和。
Fill in the grid from 1 through 9 so that every row, every column and every outlined region contains distinct digits. Shaded cells don't contain any digits. The clues in the black cells, are the sum of all the missing numbers in its Row, Coulmn and Box.
A6所在的行里缺少4,列里缺少2,宫里缺少4,因此提示是4+2+4=10.
赛事频率 极低
某年中国数独锦标赛决赛难题轮题型。