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 (3,2).









For column 6, Number 1 is only possible in cell (6,1)









For row 8, number 7 is only possible in cell (5,8)









For column 5, Number 1 is only possible in cell (5,7)









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









Number 9 is the only value possible in cell (4,7).









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









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









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









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









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









For row 2, number 7 is only possible in cell (9,2)









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









For column 5, Number 2 is only possible in cell (5,9)









For row 3, number 5 is only possible in cell (5,3)









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









For row 9, number 5 is only possible in cell (3,9)









For row 9, number 9 is only possible in cell (1,9)









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









For row 4, number 5 is only possible in cell (6,4)









For box 2, candidates for 6 are all in row 1, so you can remove candidates from other blocks.









For box 3, candidates for 4 are all in column 7, so you can remove candidates from other blocks.









Hidden Pair for 4 and 9, can remove other candidates from these cells.









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









For box 6, candidates for 9 are all in row 5, so you can remove candidates from other blocks.









Number 6 is the only value possible in cell (3,5).









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









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









Number 4 is the only value possible in cell (2,1).









Number 9 is the only value possible in cell (7,1).









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









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









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









Number 4 is the only value possible in cell (7,2).









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









Number 9 is the only value possible in cell (2,4).









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









Number 3 is the only value possible in cell (7,5).









Number 9 is the only value possible in cell (8,5).









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









Number 6 is the only value possible in cell (2,3).









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









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









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









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









Number 6 is the only value possible in cell (5,4).









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









Number 6 is the only value possible in cell (4,1).









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









Number 1 is the only value possible in cell (8,4).









Number 8 is the only value possible in cell (1,4).









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









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









Number 9 is the only value possible in cell (5,6).









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









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









Number 8 is the only value possible in cell (4,9).









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









Number 4 is the only value possible in cell (8,9).









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