Fill the grid so every row, column and box contains each digit exactly once.

Tap a cell, then a digit. Turn on Notes to pencil in candidates; they clear themselves when a digit is placed nearby.

Stuck? Hint shows where to look, explains the technique, or fills the cell. Each costs a little score.

Keyboard: arrows move, digits enter, N toggles notes, Backspace erases, Z undoes, H hints.