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 (5,1).









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









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (2,7).









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









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









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









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









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









For row 9, number 2 is only possible in cell (8,9)









For row 4, number 2 is only possible in cell (5,4)









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









For row 5, number 2 is only possible in cell (7,5)









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









For box 9, candidates for 7 are all in row 8, so you can remove candidates from other blocks.









For blocks 3 and 9, candidates for 6 are all in the same two columns (7 and 8)









For row 5, number 6 is only possible in cell (2,5)









Candidates for 7 in boxes 1 and 7 force the candidates in box 4 to be in the remaining line.









Candidates for 8 in boxes 1 and 7 force the candidates in box 4 to be in the remaining line.









Naked Pair for 6 and 7, can remove these as candidates from other cells.









Naked Pair for 1 and 9, can remove these as candidates from other cells.









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









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









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









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









Number 7 is the only value possible in cell (2,1).









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









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









Number 7 is the only value possible in cell (9,2).









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









Number 6 is the only value possible in cell (9,4).









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (7,2).









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









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









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









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









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









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









Number 1 is the only value possible in cell (3,5).









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









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









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









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









Number 7 is the only value possible in cell (3,9).