Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









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









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









For row 4, number 6 is only possible in cell (7,4)









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









For row 7, number 4 is only possible in cell (8,7)









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









For column 3, Number 6 is only possible in cell (3,7)









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









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









For row 4, number 9 is only possible in cell (3,4)









For column 6, Number 9 is only possible in cell (6,5)









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









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









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









For row 9, number 5 is only possible in cell (4,9)









For box 5, candidates for 8 are all in column 4, so you can remove candidates from other blocks.









For box 4, candidates for 7 are all in row 5, so you can remove candidates from other blocks.









For box 8, candidates for 6 are all in column 6, so you can remove candidates from other blocks.









For box 5, candidates for 3 are all in column 4, so you can remove candidates from other blocks.









For box 6, candidates for 1 are all in row 5, so you can remove candidates from other blocks.









Candidates for 8 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.









Candidates for 3 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.









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









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









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









Number 3 is the only value possible in cell (7,6).









Number 8 is the only value possible in cell (4,6).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (6,7).









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









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









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









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









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









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









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









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









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