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Description

Heyawaky is a variant of Heyawake, in which the cells in a grid are split into either shaded or unshaded.

Rules

The objective is to shade some cells, subject to the following rules:

  1. Numbers indicate how many shaded cells are in a room.
  2. Shaded cells must never touch horizontally or vertically.
  3. Unshaded cells must form one, connected area.
  4. A straight line of unshaded cells can only cross over one border at the most, even if it would re-enter a room.

Example

A standard 10x10 heyawaky puzzle and its solution.

Heyawaky Example
Heyawaky Solution