拼花地板 Parquet

拼花地板是一大类数独。在这类数独中，一些单元格可能占据了不止一行或一列，而数字不能在每行、列、宫内重复。下图的例题是拼花地板-石。

Parquet is a large category. In these puzzles, some cell may occupy more than one Row or Column. Numbers cannot repeat in each Row and Column and Box. This example is Parquet-Stone.

另一种类型是拼花地板-木。它们都遵守奇妙的规则，不按照隐藏的规律去做题的话会非常痛苦。

Another type is Parquet-Wood. Both of them obey special rules, solving without hidden rules will be painful.

◆拼花地板存在着非常强力的潜规则。

There are powerful hidden rules in this variant.

① 同位规则 Disjoint rules

这类规则在绝大多数拼花地板中都符合，但要求每个宫内的单元格形状一致。

This rule exists in most Parquet, if each Box has same cell shape.

② 额外区域 Extra Regions

③轮换 Rotation