Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









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









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









Number 9 is the only value possible in cell (4,5).









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









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









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









Number 6 is the only value possible in cell (5,8).









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









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









For column 8, Number 7 is only possible in cell (8,1)









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









Naked Pair for 3 and 9, can remove these as candidates from other cells.









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









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









For box 6, candidates for 1 are all in column 9, so you can remove candidates from other blocks.









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









For column 2, Number 3 is only possible in cell (2,9)









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









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









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









For blocks 3 and 9, candidates for 5 are all in the same two columns (8 and 7)









Candidates for 6 in boxes 4 and 5 force the candidates in box 6 to be in the remaining line.









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









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









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









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









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









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









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









Number 7 is the only value possible in cell (2,3).









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









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









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









Number 9 is the only value possible in cell (3,1).









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









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









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









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









Number 6 is the only value possible in cell (9,1).









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









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









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









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









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









Number 7 is the only value possible in cell (1,4).









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









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









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









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









Number 4 is the only value possible in cell (2,8).









Number 5 is the only value possible in cell (7,8).









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









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









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









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