How to play Mini Sudoku

1. Fill the 6×6 grid so every row contains the digits 1 to 6 exactly once.
2. Every column must also contain 1 to 6 exactly once.
3. The grid is split into six 2×3 boxes (two rows, three columns). Each box must contain 1 to 6 exactly once.
4. Given digits are fixed. Tap an empty cell, then tap a number. Use Notes to pencil in candidates.