SUDOKU FLOW

A Sudoku run of five boards, from 4×4 to 9×9. Every row, column and box holds each digit once.

• Tap a cell, then a digit (or a digit, then cells). ✎ Pencil places notes.
• Flow: set right numbers within 6 seconds of each other and the multiplier climbs to ×6. The ring round the digits shows the time left.
• A wrong number costs −8 s and −100 and ends Flow. Four wrong numbers on one board cost a lamp.
• Right numbers and finished lines feed the clock. If it empties you lose a lamp and the board fills itself.
• 🏮 Lantern (once per board) lights a cell you can set right now, for −15 s.