Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









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









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









For row 7, number 3 is only possible in cell (9,7)









For row 2, number 5 is only possible in cell (6,2)









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









For box 9, candidates for 6 are all in row 9, so you can remove candidates from other blocks.









For box 4, candidates for 1 are all in row 6, so you can remove candidates from other blocks.









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









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









Candidates for 4 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.









Candidates for 8 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.









Naked Pair for 5 and 8, can remove these as candidates from other cells.









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









Naked Pair for 5 and 8, can remove these as candidates from other cells.









For blocks 1 and 7, candidates for 8 are all in the same two columns (1 and 2)









For blocks 4 and 5, candidates for 8 are all in the same two rows (4 and 6)









Naked Pair for 3 and 9, can remove these as candidates from other cells.









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









For column 1, Number 3 is only possible in cell (1,5)









For box 5, candidates for 9 are all in row 6, so you can remove candidates from other blocks.









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









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









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









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









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









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









For row 3, number 3 is only possible in cell (7,3)









For row 1, number 4 is only possible in cell (5,1)









For row 1, number 2 is only possible in cell (6,1)









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (5,4).









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









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









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









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









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









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









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









Number 8 is the only value possible in cell (3,6).









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (3,9).









Number 2 is the only value possible in cell (5,9).









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









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