Notes on this puzzle
Sudoku #5106 is an easy grid with 40 givens, which leaves 41 cells waiting for a digit. Played purely by logic, it takes 41 forced steps from the first placement to the last.
Nothing beyond hidden single is needed anywhere, so the whole grid is a scanning exercise.
Among the givens, 1 is the most common digit (6 times) and 8 the rarest (3). The emptiest box is the central one, with 2 givens; the middle-left box is the most crowded, with 8.
Where to beginLook at row 1, column 2 first: a hidden single is available there from the very start. Scan digit by digit; notes are hardly needed here.