Notes on this puzzle
38 digits are printed in this grid and the other 43 cells are yours to fill. A solver that never guesses gets through it in 43 steps.
Nothing beyond hidden single is needed anywhere, so the whole grid is a scanning exercise.
Among the givens, 9 is the most common digit (7 times) and 2 the rarest (1). The emptiest box is the middle-left one, with 3 givens; the central box is the most crowded, with 6.
Where to beginLook at row 2, column 4 first: a hidden single is available there from the very start. Scan digit by digit; notes are hardly needed here.