投影 Projection
填入1~N,使得每行、列内数字不重复。每种颜色的区域内包含了2组1~N。
Write 1~N to make numbers no repeated in each Row or Column. Each color contains 2 groups of 1~N.
赛事频率 无
疑似是英国数独选手Tom Collyer原创题型。