Mini Killer Sudoku challenges

Pick a date and play four 6×6 Killer layouts (Easy–Expert) from the mini Sudoku daily archive—cages are derived from that day’s solution.

December 2025

The calendar highlights the last 90 days through Aug 29, 2026. Any past date still opens if you use a direct link (for example /challenges?date=… or /play/challenge/… from social). Future dates are not available yet.

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Play this day

Wednesday

December 31, 2025

Each date has four fixed puzzles (one per level). Select a level to start — timer, notes, hints, and undo work the same as in quick play.

Easy Play Medium Play Hard Play Expert Play

How to play · Techniques · Quick play