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 (3,9).









For row 5, number 8 is only possible in cell (2,5)









For column 2, Number 3 is only possible in cell (2,2)









For column 6, Number 3 is only possible in cell (6,9)









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









For column 3, Number 7 is only possible in cell (3,6)









For box 4, Number 6 is only possible in cell (1,4)









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









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









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









For row 4, number 5 is only possible in cell (8,4)









For box 3, candidates for 7 are all in row 2, so you can remove candidates from other blocks.









For box 7, candidates for 9 are all in row 8, so you can remove candidates from other blocks.









For box 3, candidates for 6 are all in row 2, so you can remove candidates from other blocks.









For box 3, candidates for 4 are all in row 1, so you can remove candidates from other blocks.









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









For blocks 4 and 7, candidates for 9 are all in the same two columns (1 and 2)









For blocks 4 and 5, candidates for 4 are all in the same two rows (5 and 6)









Candidates for 9 in boxes 1 and 2 force the candidates in box 3 to be in the remaining line.









Naked Pair for 1 and 4, can remove these as candidates from other cells.









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









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









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









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









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









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









Number 1 is the only value possible in cell (6,5).









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









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









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









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









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









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









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









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









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









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









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









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









Number 2 is the only value possible in cell (1,8).









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









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









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









Number 8 is the only value possible in cell (1,2).









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









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









Number 6 is the only value possible in cell (9,7).









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









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









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (7,8).









Number 6 is the only value possible in cell (5,8).









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









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









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









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









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