SUDOKU QUARTERLY (First quarter, 2020)
contains the 13 issues of SUDOKU WEEKLY
of week one until week 13.
In each week, there is a Sudoku for each day.
All 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.