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 (6,9).









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









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









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









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









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









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









For column 4, Number 7 is only possible in cell (4,1)









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









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









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









For row 2, number 5 is only possible in cell (4,2)









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









For box 4, Number 4 is only possible in cell (1,5)









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









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









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









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









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









Number 9 is the only value possible in cell (8,6).









For row 3, number 5 is only possible in cell (1,3)









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









For blocks 4 and 7, candidates for 8 are all in the same two columns (1 and 3)









For row 1, number 8 is only possible in cell (5,1)









For blocks 1 and 4, candidates for 3 are all in the same two columns (1 and 3)









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









For column 1, Number 6 is only possible in cell (1,8)









For column 8, Number 6 is only possible in cell (8,2)









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 3 is the only value possible in cell (1,6).









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









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









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









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









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









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









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









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









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









Number 3 is the only value possible in cell (7,9).









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