Easy sudoku 4

An easy nine by nine: enough numbers are printed that every empty square can be settled by looking at what its row, its column and its box already hold. No pencil marks, no chains, nothing that needs a second sheet of paper next to it.

142378657181495916276428956372699171469783
Show the answer key
914523786562798143837164295491652378658317924723849561375286419289431657146975832

What is on this sheet

Given numbers
42
Difficulty
Easy
Hardest step needed
Naked single
Grid
9 × 9

About this puzzle

Easy here means between 36 and 45 of the 81 numbers are already printed, and that the grid can be finished with single candidates alone. It was graded by being solved by a program that knows the techniques, one at a time, and rejected if it ever had to guess — so there is exactly one answer, and it is on the second page.

This particular grid starts with 42 of the 81 numbers already printed, and the hardest technique it asks for is: Naked single.

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