反國王數獨

Borrowed from chess: a digit may never sit diagonally adjacent to a copy of itself, so every placement clears all eight surrounding cells. Corners and edges, with fewer neighbours, are the natural starting points. Quick to learn, and the diagonal pressure keeps mid-game deductions flowing.

如需完整規則、解題範例及解題技巧，請閱讀完整 如何遊玩 反國王數獨 指南。

與所有數獨變體一樣，反國王數獨 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。