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 8, number 9 is only possible in cell (1,8)









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









Number 1 is the only value possible in cell (3,7).









Number 3 is the only value possible in cell (1,7).









For row 2, number 7 is only possible in cell (9,2)









For row 7, number 7 is only possible in cell (2,7)









For row 9, number 7 is only possible in cell (6,9)









For column 2, Number 6 is only possible in cell (2,9)









For row 8, number 3 is only possible in cell (5,8)









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









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









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









Number 3 is the only value possible in cell (4,5).









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









For row 4, number 2 is only possible in cell (1,4)









For box 9, Number 2 is only possible in cell (7,7)









For row 3, number 2 is only possible in cell (9,3)









For box 8, candidates for 8 are all in column 4, so you can remove candidates from other blocks.









For row 2, number 8 is only possible in cell (1,2)









For box 9, candidates for 8 are all in column 8, so you can remove candidates from other blocks.









For row 4, number 8 is only possible in cell (9,4)









For box 7, candidates for 5 are all in row 9, so you can remove candidates from other blocks.









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









Naked Triple for 2, 5 and 9, can remove these as candidates from other cells.









Either candidate for cell (4,7) forces 5 into cell (8,4).









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (3,2).









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









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









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









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (8,9).









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









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









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









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









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









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









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









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









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









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









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









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









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









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