SUDOKU QUARTERLY of the second quarter of 2021 contains

the thirteen issues of SUDOKU WEEKLY of week 14 to week 26.

Each week, there is a Sudoku for each day.

All these Sudokus are magic:

From Monday (which has only one magic block)

until Saturday (with six magic blocks) each weekday has

one more magic block than the previous day.

On Sunday all blocks are magic.