Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









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









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









For row 3, number 1 is only possible in cell (4,3)









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









For row 7, number 1 is only possible in cell (8,7)









For column 2, Number 3 is only possible in cell (2,8)









For column 4, Number 3 is only possible in cell (4,5)









For row 6, number 3 is only possible in cell (7,6)









For column 2, Number 4 is only possible in cell (2,5)









For row 2, number 8 is only possible in cell (6,2)









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









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









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









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









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









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









For blocks 2 and 5, candidates for 4 are all in the same two columns (4 and 5)









Candidates for 9 in boxes 4 and 6 force the candidates in box 5 to be in the remaining line.









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (3,5).









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









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









Number 7 is the only value possible in cell (4,8).









Number 4 is the only value possible in cell (7,9).









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









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









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









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (5,7).









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









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









Number 3 is the only value possible in cell (5,9).