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Heyawake Hitori

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Heyawake Hitori is a hybrid of Heyawake and Hitori, in which the cells in a grid are split into either shaded or unshaded.


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.
  5. No two numbers with the same value can appear unshaded in the same row or column.


A standard 10x10 heyawake hitori puzzle and its solution.

Heyawake Hitori Example
Heyawake Hitori Answer

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