反国王数独

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.

有关完整规则、示例和解题技巧，请阅读完整的 如何玩反国王数独 指南。

与所有数独变体一样，反国王数独建立在经典的9×9基础上。每行、每列和每个3×3宫必须恰好包含每个数字1到9一次。变体约束是 添加在顶部 这些标准规则的一部分，从不替换它们。

如果你是数独新手，请先学习 基本规则和技巧 在尝试变体之前。