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Tatamibari: an introduction

Puzzling Asked on May 24, 2021

This is an entry for Fortnightly Topic Challenge #44: Introduce a new grid deduction genre to the community


This is a Tatamibari puzzle, where you divide the grid into rectangles and squares.

Rules taken from Wikipedia:

  • Every partition must contain exactly one symbol in it.
  • A + symbol must be contained in a square.
  • A | symbol must be contained in a rectangle with a greater height than width.
  • A – symbol must be contained in a rectangle with a greater width than height.
  • Four pieces may never share the same corner.

An example puzzle and its solution:

example puzzle

example solution

Now, solve this puzzle:

the real puzzle - see CSV file below

Here is the puzzle in a playable form. The link leads to a puzz.link editor (which has a timer, if you care about that).

First answer with a full logical solution path gets the checkmark.

CSV version:

,,,,,,,,,|
,,,,,,,,,
,,,,-,,-,,,
,,-,-,,,|,,,
,,,,,,,,,|
+,,,,,,,,,
,,,+,,,+,+,,
,,,|,,+,,,,
,,,,,,,,,
-,,,,,,,,,

One Answer

The basic deductions:

Now, we ask:

And a similar question is helpful again:

A similar process lets us fill up the left column:

And similar arguments work to finish off the puzzle. The solution is:

Correct answer by Deusovi on May 24, 2021

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