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 9, number 2 is only possible in cell (6,9)









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









For column 9, Number 7 is only possible in cell (9,6)









For row 5, number 8 is only possible in cell (7,5)









For row 4, number 8 is only possible in cell (4,4)









For box 5, Number 1 is only possible in cell (4,6)









For column 6, Number 4 is only possible in cell (6,8)









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









For box 6, candidates for 9 are all in column 7, so you can remove candidates from other blocks.









Candidates for 2 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.









Naked Pair for 5 and 9, can remove these as candidates from other cells.









Number 2 is the only value possible in cell (1,3).









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









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









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









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









For column 3, Number 4 is only possible in cell (3,7)









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









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









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









For row 9, number 9 is only possible in cell (2,9)









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









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









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









For box 4, candidates for 9 are all in column 3, so you can remove candidates from other blocks.









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









X-Wing in rows for 5.









Either candidate for cell (1,1) forces 2 into cell (8,1).









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









Either candidate for cell (1,1) forces 9 into cell (3,6).









For row 4, number 9 is only possible in cell (7,4)









For row 4, number 3 is only possible in cell (8,4)









For column 7, Number 3 is only possible in cell (7,9)









Either candidate for cell (3,1) forces 6 into cell (7,7).









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









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









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









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









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









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









Number 8 is the only value possible in cell (5,1).









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









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









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









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









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









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









Number 6 is the only value possible in cell (3,4).









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









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









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









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









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









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









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









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









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









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









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