Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For row 8, number 3 is only possible in cell (2,8)









For column 3, Number 3 is only possible in cell (3,1)









For row 1, number 4 is only possible in cell (8,1)









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









For box 1, Number 6 is only possible in cell (1,2)









Hidden Pair for 3 and 6, can remove other candidates from these cells.









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









For column 3, Number 5 is only possible in cell (3,7)









For row 9, number 5 is only possible in cell (6,9)









For column 4, Number 5 is only possible in cell (4,1)









For column 1, Number 5 is only possible in cell (1,4)









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









For column 6, Number 8 is only possible in cell (6,8)









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









For box 2, candidates for 7 are all in column 5, so you can remove candidates from other blocks.









For box 8, Number 7 is only possible in cell (4,7)









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









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









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









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









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (5,8).









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









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









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









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









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









Number 4 is the only value possible in cell (5,9).









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









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









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









Number 1 is the only value possible in cell (9,6).









Number 8 is the only value possible in cell (2,6).









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









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









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









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









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









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









Number 7 is the only value possible in cell (5,2).









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









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









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









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









Number 6 is the only value possible in cell (5,3).









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









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









Number 6 is the only value possible in cell (3,5).









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









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









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









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









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