What does the > sign mean?
The cell the arrow points to is smaller than the cell it points from.
Can Futoshiki have no signs?
A puzzle with no signs is just a Latin square and would have many solutions.
What size grids exist?
Common sizes are 4x4 through 9x9.
Do I need math beyond comparing numbers?
No. Futoshiki is pure comparison logic.
How do I spot contradictions?
If a chain of signs forces a digit to be both larger and smaller than another, you have an error.
