Difference between revisions of "Jigsaw Sudoku"

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A '''Jigsaw''' Sudoku does not have 3x3 [[box]]es, but regions with an irregular shape.
A '''Jigsaw''' Sudoku does not have 3x3 [[box]]es, but regions with an irregular shape.


A Jigsaw example:
Jigsaw is a very popular [[Sudoku Variant]].
  .-------.---------------.-----------.
 
  | .  8 | .  .   .  . | .  .   1 |
=== Example ===
  |      '-------.       |           |
 
  | 1   .  .  . | .  6 | 3  .   . |
[[Image:Jigsaw example 2.png]]
  |      .---.---:      '---.       |
 
  | .  . | . | . | .  .   . | . |
In a forum, this puzzle can be presented like this:
  |  .---'  |  '---.-------'---.  |
 
  | . | .  . | 3   . | 7 | . |
  .-----------.---.-------------------.
  :---'      |       '---.       '---:
  | .  .  . | . | .  2   .  .  . |
  | .   .   . | .  8   . | .   .  . |
  |      .---'  '-------.          |
  :---.      '---.      |       .---:
  | .   . | .  3   .  . | .  9   . |
  | . | 7   .  1 | .   2 | .  . | . |
  |      :-----------.   '---.---.   |
  |  '---.-------'---.  |   .---'  |
  | .  1 | .   .   . | .  . | . | . |
  | .  5 | .  .  . | . | . | .  . |
  |  .---'  .-------'---.  |   '---:
  |       '---.       :---'---'       |
  | 7 | .  . | .  .  . | 4 | .  . |
  | .  .   7 | 9   . | .  .  .   4 |
  |  |  .---:          |  |   .---:
  |          |      '-------.      |
  | . | . | . | .  .   . | . | 2 | 5 |
  | 3   .  . | .   .   . | 1   . |
  :---'   |  |          :---'  |  |
  '-----------'---------------'-------'
  | .  6 | . | .   .  . | .  . | . |
  :---.  |  '---.-------'  .---'  |
  | . | 7 | .  . | .  .  . | .  6 |
  |   '---'---.   '-----------:       |
  | .  9   5 | .   .   . | .  . |
  |          '-------.   .---'       |
  | .   .  .  2   . | . | .  4   . |
  '-------------------'---'-----------'
 
The irregular regions allow the player to use the [[Law of Leftovers]], a [[solving technique]] which can only be used on irregular regions.
The irregular regions allow the player to use the [[Law of Leftovers]], a [[solving technique]] which can only be used on irregular regions.


Jigsaw is one of the most popular [[Sudoku Variations]]
[[Category:Sudoku Variants]]

Latest revision as of 12:02, 30 October 2021

A Jigsaw Sudoku does not have 3x3 boxes, but regions with an irregular shape.

Jigsaw is a very popular Sudoku Variant.

Example

Jigsaw example 2.png

In a forum, this puzzle can be presented like this:

.-----------.---.-------------------.
| .   .   . | . | .   2   .   .   . |
|       .---'   '-------.           |
| .   . | .   3   .   . | .   9   . |
|       :-----------.   '---.---.   |
| .   1 | .   .   . | .   . | . | . |
|   .---'   .-------'---.   |   '---:
| 7 | .   . | .   .   . | 4 | .   . |
|   |   .---:           |   |   .---:
| . | . | . | .   .   . | . | 2 | 5 |
:---'   |   |           :---'   |   |
| .   6 | . | .   .   . | .   . | . |
:---.   |   '---.-------'   .---'   |
| . | 7 | .   . | .   .   . | .   6 |
|   '---'---.   '-----------:       |
| .   9   5 | .   .   .   . | .   . |
|           '-------.   .---'       |
| .   .   .   2   . | . | .   4   . |
'-------------------'---'-----------'

The irregular regions allow the player to use the Law of Leftovers, a solving technique which can only be used on irregular regions.