How to play Futoshiki
Latin square rules plus inequality signs between cells.
The goal
On an n×n grid, place digits 1 through n so that each row and each column contains every digit once.
Inequality clues
Between some neighboring cells you will see > or < (and vertical equivalents). The numbers on either side must obey that comparison.
Givens & checking
Some cells start filled as givens. Use logic—not guessing—to finish the grid, then tap Check grid. ProPuz sizes: Easy 4×4 through Expert 7×7.