Tuesday, 16 July 2013

Heyawake Hitori Instructions

Rules: The challenge is to paint some cells on the grid, subject to the following rules:
  1. Painted cells must never touch horizontally or vertically
  2. Unpainted cells must form one, connected area.
  3. Superscript numbers dictate how many painted cells are in a room, also a straight line of unpainted cells can only connect two rooms i.e. any such line of white cells which connects three or more rooms is forbidden.
  4. No two numbers the same can remain unpainted in the same row or column.

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