Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




For row 1, number 9 is only possible in cell (1,1)









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









For row 9, number 8 is only possible in cell (3,9)









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









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









For row 1, number 6 is only possible in cell (8,1)









For row 5, number 6 is only possible in cell (3,5)









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









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









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









For row 1, number 2 is only possible in cell (7,1)









For row 3, number 2 is only possible in cell (1,3)









For row 9, number 2 is only possible in cell (6,9)









For box 3, Number 7 is only possible in cell (9,1)









For column 6, Number 4 is only possible in cell (6,4)









For box 3, candidates for 8 are all in row 3, so you can remove candidates from other blocks.









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









For box 2, candidates for 3 are all in row 1, so you can remove candidates from other blocks.









For box 6, candidates for 5 are all in column 7, so you can remove candidates from other blocks.









Candidates for 3 in boxes 1 and 4 force the candidates in box 7 to be in the remaining line.









Candidates for 5 in boxes 1 and 4 force the candidates in box 7 to be in the remaining line.









X-Wing in columns for 5.









Hidden Pair for 3 and 5, can remove other candidates from these cells.









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (4,9).









Number 5 is the only value possible in cell (4,8).









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









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









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









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









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









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (5,8).









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









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









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