Killer Sudoku by
krazydad
❤️
Killer Sudoku, Tough, 5-1-1
©2026 krazydad.com
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H
int
Check
A
nswer
Reveal
E
rrors
Clear Puzzle
I
nstructions
C
alculator
Set up Marks
Clear Marks
P
ause/unpause
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Close
Puzzle Calc
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Killer Sudoku Settings
Cage coloring
Dotted lines
Double-tap selects cage
Mark with dots
Auto-clear marks
Auto-set marks
Auto-check answers
Reveal solved digits
Off
On
Auto
Dark Mode
Pics
Quotes
Both
Rewards
×
Close
Find a puzzle
Variety
Intermediate
Challenging
Tough
Super-tough
Insane
Volume#
Book#
Puzzle#