Killer Sudoku instructions and free Killer Sudoku puzzles to play online

I hired a developer to create a sudoku generator for me. It generates 4x4, 6x6 and 9x9 with the difficulties easy, medium, hard, very hard. This is from a 6x6 very hard

Sudoku 6x6 - Medium

Children's Puzzles. Three volumes of 6x6 Sudoku puzzles. Each volume includes 300 puzzles

Year 6 Sudoku 6 x 6 Worksheet (teacher made) - Twinkl

Sudoku-X instructions and free Sudoku-X puzzles to play online

6x6 Easy Sudoku Puzzles Printable

Mini Sudoku 6X6 - Medio - Volume 45 - 276 Puzzle 9781512107692

Sudoku - Your attention. Jigsaw sudoku killer 6x6 easy level. # 129 Killer Sudoku 6x6 (Sum-do-ku, Sums Number Place, Kikagaku Nampure, Sums Sudoku, Samunamupure). The entire playing field consists of 36 cells.

Kakuro Sudoku: 1000 + Kakuro puzzles 5x5 - 6x6 - 7x7 - 8x8 (Series #1) (Paperback)

Chain Sudoku 6x6 - Easy