A Sudoku puzzle with 26 givens.

A sudoku with only 3 givens? How is that even possible?

David Nacin (@quadratablog) / X

Sudoku - Wikipedia

Calcudoku puzzle forum - View topic - A Sudoku that almost tells you where the numbers are.

algorithms - Maximum number of clues in a Sudoku game that does not produce a unique solution - Mathematics Stack Exchange

Figure 3 from β-Hill Climbing Algorithm for Sudoku Game

Friday Puzzle #22 - Color Puzzle Sampler 2

Kropki Sudoku Puzzles - Play Sudoku with Kropki Dots - Mastering Sudoku

Thermo Sandwich (<>) Sudoku — Rätselportal — Logic Masters Deutschland

2006 SUDOKU MASTER PUZZLES EDUCATIONAL HELPS-TEACHER HOME SCHOOL-W-PC-CD ROM

Samurai Sudoku Puzzle Book: 500 Easy Puzzles overlapping into 100 samurai style: 9781540800015: Dalipi, Arbëresh: Books

I have never seen a sudoku puzzle that looks like this. First pic is solution to the second one. It doesn't make sense to me. Can someone tell me how it works?

BOHS Wooden Rainbow Sudoku for Kids - 3 in 1 Easy to Hard - with Book – BOHS Toys