Latin Square
Fill every cell with 1 to N so each row and column contains every number once.
Controls
Fill every empty cell with a number from 1 to N, where N is the side length of the grid. Each row and each column must contain every number from 1 to N exactly once. Tap a cell, then tap a number to place it; use Clear to reset the board and the answer button to reveal or hide the full grid.
Brain training · PuzGo