XV數獨

An X between two cells means they total 10; a V means they total 5; a blank edge guarantees neither. That silent negative rule does as much work as the printed letters. Easy to pick up, surprisingly deep once you mine the unmarked edges.

如需完整規則、解題範例及解題技巧，請閱讀完整 如何遊玩 XV數獨 指南。

與所有數獨變體一樣，XV數獨 建立在經典的9×9基礎上。每行、每列和每個3×3宮都必須包含每個數字1到9恰好一次。變體約束是 添加在上面 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。