AT THE CASUAL DESK
Cipher Sudoku
Complete a compact four-by-four lunar cipher.
Logic puzzle
One clear challenge.
Choose an empty square and a number. Every row, column and two-by-two box must contain 1, 2, 3 and 4 once.
No Play Credits or stakes. Your best and completed challenges are saved on this device when storage is available.
Before you play
The goal and next move appear above the field. Direction, action and settings buttons sit below the field. Start when you are ready; Pause stops time and movement. Restart creates a fresh attempt. Preview begins automatically and does not save a result.
UN-POP is for UK adults aged 18+. Read Player Care, Terms and Privacy before creating an account.