Sudoku
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P
uzzle
C
onstraints
Title
Author(s)
Rules
Links
Grid size
W
idth:
H
eight:
Values and givens
1
2
3
4
5
6
7
8
9
1–9
0–8
Regions
3×3
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Fill the rest
Values in rows may not repeat
Values in columns may not repeat
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T
est puzzle
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s
h puzzle
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Constraints
Edit constraint code
Name
Kind
Custom (anything goes)
Global (e.g. anti-knight)
Single cell (e.g. odd/even)
Two orthogonal cells (e.g. Kropki dot)
Four cells in a 2×2 (e.g. clockwise)
Path (e.g. thermometer)
Region (e.g. killer cage)
Matching regions (e.g. clone)
Row or column (e.g. sandwich)
Diagonal (e.g. little killer)
Properties
Logic (Suco)
Code to generate SVG (Suco)
Code to generate SVG definitions (Suco)
Add a constraint
Select a set of cells in the grid.
Press a lower-case letter to add one of the common constraints listed below.
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Shortcuts for common constraints:
a
Arrow (1-cell sum)
b
Between line
c
Clone regions
d
Difference (white Kropki dot)
e
Even
f
Battlefield
g
Greater than
i
Minimum cell
k
Killer cage
l
Little killer
m
Maximum cell
n
No consecutive
o
Odd
p
Palindrome
q
Quadruple (Inclusion)
r
Ratio (black Kropki dot)
s
Sandwich
t
Thermometer
u
X-Sum
v
V (sum of 5)
w
German Whispers line
x
X (sum of 10)
y
Skyscraper
=
Last selected constraint
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