Notes on this puzzle
Sudoku #5306 is a hard grid with 26 givens, which leaves 55 cells waiting for a digit. Played purely by logic, it takes 58 forced steps from the first placement to the last.
Most cells fall to the hidden single move: 55 of the 58 steps. Pointing pair accounts for 3 more.
Among the givens, 5 is the most common digit (5 times) and 2 the rarest (1). The emptiest box is the top-middle one, with 2 givens; the central box is the most crowded, with 4.
Where to beginLook at row 6, column 2 first: a hidden single is available there from the very start. Pencil in candidates for one box at a time and watch for two cells that share the same pair.