There are only twelve 4x4 sudokus (and a cool trick for finding minimal subsets)

Automated excerpt

Or 288, depending on what counts as different solutions to you. What, why, and exactly whatToday's rabbithole is how many unique 4x4 sudoku solutions (as well as possible puzzles) there are. If we wanted, we could solve the same puzzle using "🔴, 🟣, 🔵, 🟢" instead of "1, 2, 3, 4", and the puzzle would remain exactly the same. So, to get the number of all possible structures, we can just count all the possible solutions starting with 1 2 3 4.

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