Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




Number 8 is the only value possible in cell (9,3).









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









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









For row 5, number 9 is only possible in cell (7,5)









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









For box 9, Number 7 is only possible in cell (8,7)









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









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









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









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









For row 6, number 3 is only possible in cell (2,6)









For row 5, number 3 is only possible in cell (4,5)









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









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









For box 5, candidates for 1 are all in row 4, so you can remove candidates from other blocks.









Candidates for 5 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.









Hidden Pair for 4 and 6, can remove other candidates from these cells.









Either candidate for cell (7,4) forces 1 into cell (4,4).









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









Number 7 is the only value possible in cell (4,3).









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









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









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









For row 3, number 9 is only possible in cell (2,3)









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









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









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









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









For row 5, number 1 is only possible in cell (3,5)









For row 6, number 1 is only possible in cell (7,6)









Either candidate for cell (9,6) forces 8 into cell (5,4).









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









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









For row 5, number 8 is only possible in cell (1,5)









Number 6 is the only value possible in cell (1,2).









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









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









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









Number 6 is the only value possible in cell (8,4).









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









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









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









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









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









Number 2 is the only value possible in cell (9,6).









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









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









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









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









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









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









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









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