Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For row 7, number 9 is only possible in cell (8,7)









For row 9, number 8 is only possible in cell (5,9)









For column 9, Number 8 is only possible in cell (9,2)









For column 9, Number 5 is only possible in cell (9,8)









For box 2, candidates for 9 are all in row 2, so you can remove candidates from other blocks.









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









Either candidate for cell (7,3) forces 2 into cell (1,3).









For row 4, number 2 is only possible in cell (3,4)









For row 4, number 8 is only possible in cell (7,4)









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









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









For column 6, Number 9 is only possible in cell (6,2)









Hidden Pair for 1 and 8, can remove other candidates from these cells.









For row 5, number 9 is only possible in cell (4,5)









Either candidate for cell (8,1) forces 9 into cell (3,3).









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









Either candidate for cell (5,5) forces 6 into cell (5,1).









Either candidate for cell (5,5) forces 6 into cell (7,6).









Either candidate for cell (5,5) forces 6 into cell (9,7).









For row 9, number 6 is only possible in cell (4,9)









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









For blocks 7 and 8, candidates for 4 are all in the same two rows (7 and 8)









Either candidate for cell (9,6) forces 1 into cell (2,9).









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









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









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









Number 7 is the only value possible in cell (3,2).









Number 5 is the only value possible in cell (4,2).









Number 4 is the only value possible in cell (7,2).









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









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









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









Number 7 is the only value possible in cell (1,4).









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









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









Number 3 is the only value possible in cell (2,1).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (8,9).









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