Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For column 6, Number 9 is only possible in cell (6,5)









For row 4, number 9 is only possible in cell (8,4)









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









For row 9, number 5 is only possible in cell (8,9)









For column 9, Number 5 is only possible in cell (9,3)









For row 3, number 9 is only possible in cell (3,3)









For column 4, Number 3 is only possible in cell (4,1)









For column 9, Number 4 is only possible in cell (9,7)









For box 8, Number 2 is only possible in cell (5,8)









For column 5, Number 7 is only possible in cell (5,9)









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









For box 7, candidates for 6 are all in column 3, so you can remove candidates from other blocks.









For box 3, candidates for 2 are all in column 7, so you can remove candidates from other blocks.









For box 9, candidates for 1 are all in row 8, so you can remove candidates from other blocks.









For box 6, candidates for 8 are all in row 5, so you can remove candidates from other blocks.









Hidden Pair for 1 and 4, can remove other candidates from these cells.









Naked Pair for 1 and 4, can remove these as candidates from other cells.









Hidden Pair for 6 and 7, can remove other candidates from these cells.









Hidden Pair for 6 and 7, can remove other candidates from these cells.









For row 7, number 2 is only possible in cell (1,7)









Either candidate for cell (4,4) forces 3 into cell (2,4).









Either candidate for cell (2,6) forces 8 into cell (5,4).









Number 9 is the only value possible in cell (5,2).









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









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









Number 4 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 (2,3).









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









Number 8 is the only value possible in cell (1,2).









Number 6 is the only value possible in cell (9,2).









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









Number 6 is the only value possible in cell (2,1).









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









Number 1 is the only value possible in cell (7,3).









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









Number 5 is the only value possible in cell (3,4).









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









Number 1 is the only value possible in cell (2,5).









Number 2 is the only value possible in cell (3,5).









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









Number 7 is the only value possible in cell (8,1).









Number 8 is the only value possible in cell (7,1).









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









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









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









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









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









Number 2 is the only value possible in cell (8,6).









Number 6 is the only value possible in cell (8,7).









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









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









Number 8 is the only value possible in cell (6,7).









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









Number 6 is the only value possible in cell (3,8).









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









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









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









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









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









Number 4 is the only value possible in cell (3,9).









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