Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









For column 5, Number 6 is only possible in cell (5,3)









For row 6, number 5 is only possible in cell (7,6)









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









For row 8, number 3 is only possible in cell (6,8)









For box 8, Number 1 is only possible in cell (6,9)









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









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









For column 5, Number 9 is only possible in cell (5,2)









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









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









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









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









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









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









Number 3 is the only value possible in cell (4,1).









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









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









For row 9, number 2 is only possible in cell (5,9)









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









For box 8, candidates for 4 are all in row 7, so you can remove candidates from other blocks.









Candidates for 2 in boxes 4 and 5 force the candidates in box 6 to be in the remaining line.









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









Hidden Pair for 2 and 4, can remove other candidates from these cells.









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









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









Number 2 is the only value possible in cell (9,1).









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









For row 4, number 2 is only possible in cell (8,4)









Naked Pair for 4 and 8, can remove these as candidates from other cells.









Naked Pair for 6 and 9, can remove these as candidates from other cells.









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









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









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









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









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









Number 8 is the only value possible in cell (7,9).









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









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









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









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









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









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









Number 7 is the only value possible in cell (2,6).









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









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









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









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









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









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









Number 2 is the only value possible in cell (4,6).









Number 7 is the only value possible in cell (4,5).









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









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









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









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









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









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









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









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









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









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









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