Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For row 7, number 9 is only possible in cell (8,7)









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









For box 7, Number 5 is only possible in cell (3,8)









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









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









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









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









For row 3, number 3 is only possible in cell (2,3)









For row 2, number 3 is only possible in cell (5,2)









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









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









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









Naked Pair for 4 and 6, can remove these as candidates from other cells.









For box 7, candidates for 4 are all in column 1, so you can remove candidates from other blocks.









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 8 is the only value possible in cell (3,7).









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









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









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









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









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









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









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









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









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









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









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