Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For column 8, Number 9 is only possible in cell (8,4)









For column 8, Number 3 is only possible in cell (8,9)









For column 4, Number 8 is only possible in cell (4,9)









For column 8, Number 8 is only possible in cell (8,7)









For column 3, Number 6 is only possible in cell (3,2)









For column 4, Number 6 is only possible in cell (4,5)









For column 8, Number 6 is only possible in cell (8,3)









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









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









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









Number 2 is the only value possible in cell (9,3).









For box 3, candidates for 7 are all in column 9, so you can remove candidates from other blocks.









For box 4, candidates for 5 are all in column 1, so you can remove candidates from other blocks.









Candidates for 4 in boxes 1 and 7 force the candidates in box 4 to be in the remaining line.









Candidates for 7 in boxes 1 and 7 force the candidates in box 4 to be in the remaining line.









Naked Pair for 2 and 5, can remove these as candidates from other cells.









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









For column 3, Number 2 is only possible in cell (3,6)









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









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









For row 1, number 2 is only possible in cell (6,1)









For column 6, Number 3 is only possible in cell (6,6)









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









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









Number 7 is the only value possible in cell (6,5).









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









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









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









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









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









Number 9 is the only value possible in cell (1,5).









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









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









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









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









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









Number 9 is the only value possible in cell (2,1).









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









Number 2 is the only value possible in cell (5,7).









Number 6 is the only value possible in cell (1,7).









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









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









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









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









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









Number 5 is the only value possible in cell (6,2).









Number 3 is the only value possible in cell (4,1).









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









Number 5 is the only value possible in cell (9,1).









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









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









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









Number 5 is the only value possible in cell (4,8).









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









Number 2 is the only value possible in cell (1,9).









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









Number 4 is the only value possible in cell (6,9).









Number 6 is the only value possible in cell (7,9).









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