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 7, number 7 is only possible in cell (8,7)









For column 5, Number 7 is only possible in cell (5,2)









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









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









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









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









For row 8, number 3 is only possible in cell (7,8)









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









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









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









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









For box 7, candidates for 9 are all in column 2, so you can remove candidates from other blocks.









For box 3, candidates for 5 are all in column 8, so you can remove candidates from other blocks.









Naked Pair for 8 and 9, can remove these as candidates from other cells.









Candidates for 8 in boxes 5 and 8 force the candidates in box 2 to be in the remaining line.









Candidates for 9 in boxes 5 and 8 force the candidates in box 2 to be in the remaining line.









Naked Pair for 1 and 6, can remove these as candidates from other cells.









Naked Pair for 1 and 5, can remove these as candidates from other cells.









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









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









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









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









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









For row 6, number 3 is only possible in cell (1,6)









For row 1, number 3 is only possible in cell (2,1)









For row 1, number 7 is only 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 (1,5).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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