箭頭數獨

The digit in each circle equals the total of the cells its arrow passes through. Since a circle tops out at 9, shafts are starved toward small digits, and one-cell arrows hand you free placements. Arithmetic-flavoured and noticeably tougher than its difficulty label suggests.

如需完整規則、範例解題及解題技巧，請閱讀完整 如何遊玩 箭頭數獨 指南。

與所有數獨變體一樣，箭頭數獨建立在經典的9×9基礎上。每行、每列和每個3×3宮必須包含每個數字1到9恰好一次。變體約束是 添加在頂部 這些標準規則，從不取代它們。

如果你是數獨新手，先學習 基本規則和技巧 在嘗試變體之前。