Kepler's Lab
Home
Number
Puzzle
Every
row,
column,
and
box
gets
1
to
4,
each
just
once.
Level 1
Level 2
Level 3
New puzzle
4
3
2
2
4
3
1
2
1
2
3
4
Erase
Tap a square, then tap a number.
Hint
Kepler's LabKepler's Lab