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Classics: 9*9 and other sizes, and samurai
Small grids: Smaller than 9*9
Element variations: Greater than, Neighborhood, Ordering, Calculation, Outside clues
Area variations: Cell variation, Extra region, Irregular, Deficit
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Change Log 2020/8/15 排头兵数独
2020/5/21 521
2020/3/21 空格迷题
2020/2/2 折纸数独
2020/1/16 斜线重复数
2019/9/29 边框谁最大
2019/9/29 连续同奇偶性数独
2019/9/29 房间号
2019/9/26 小内杀手
2019/9/26 斐波那契连续数数独
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