Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




For column 5, Number 4 is only possible in cell (5,4)









Number 5 is the only value possible in cell (1,4).









Number 2 is the only value possible in cell (3,4).









Number 3 is the only value possible in cell (6,4).









Number 6 is the only value possible in cell (7,4).









Number 9 is the only value possible in cell (3,6).









For column 2, Number 9 is only possible in cell (2,1)









For column 6, Number 5 is only possible in cell (6,5)









For row 5, number 9 is only possible in cell (4,5)









For row 2, number 9 is only possible in cell (5,2)









For column 9, Number 4 is only possible in cell (9,3)









For column 1, Number 4 is only possible in cell (1,2)









For column 2, Number 2 is only possible in cell (2,3)









For row 6, number 3 is only possible in cell (7,6)









For row 6, number 5 is only possible in cell (9,6)









For box 3, candidates for 8 are all in column 7, so you can remove candidates from other blocks.









For box 1, candidates for 7 are all in column 3, so you can remove candidates from other blocks.









For blocks 3 and 6, candidates for 2 are all in the same two columns (7 and 8)









Naked Pair for 1 and 7, can remove these as candidates from other cells.









Naked Pair for 4 and 8, can remove these as candidates from other cells.









Naked Pair for 1 and 7, can remove these as candidates from other cells.









Number 2 is the only value possible in cell (8,5).









Number 5 is the only value possible in cell (8,1).









Number 1 is the only value possible in cell (7,5).









Number 7 is the only value possible in cell (7,8).









Number 8 is the only value possible in cell (7,2).









Number 2 is the only value possible in cell (7,1).









Number 1 is the only value possible in cell (6,8).









Number 5 is the only value possible in cell (7,9).









Either candidate for cell (4,2) forces 7 into cell (8,2).









Number 1 is the only value possible in cell (8,3).









For row 3, number 7 is only possible in cell (6,3)









For row 1, number 7 is only possible in cell (3,1)









For row 7, number 7 is only possible in cell (2,7)









For row 9, number 7 is only possible in cell (5,9)









For box 2, candidates for 6 are all in column 4, so you can remove candidates from other blocks.









Either candidate for cell (1,1) forces 3 into cell (5,1).









Number 2 is the only value possible in cell (5,8).









Number 1 is the only value possible in cell (5,6).









Number 2 is the only value possible in cell (4,6).









Number 3 is the only value possible in cell (4,7).









Number 9 is the only value possible in cell (8,7).









Number 6 is the only value possible in cell (6,7).









Number 1 is the only value possible in cell (1,7).









Number 8 is the only value possible in cell (1,1).









Number 1 is the only value possible in cell (4,1).









Number 6 is the only value possible in cell (4,2).









Number 1 is the only value possible in cell (3,2).









Number 6 is the only value possible in cell (1,3).









Number 8 is the only value possible in cell (4,3).









Number 2 is the only value possible in cell (9,7).









Number 8 is the only value possible in cell (9,8).









Number 4 is the only value possible in cell (3,8).









Number 8 is the only value possible in cell (3,5).









Number 4 is the only value possible in cell (2,5).









Number 3 is the only value possible in cell (2,8).









Number 8 is the only value possible in cell (2,9).









Number 6 is the only value possible in cell (3,9).









Number 9 is the only value possible in cell (6,9).









Number 3 is the only value possible in cell (8,9).









Number 1 is the only value possible in cell (9,9).