Well they say that you lose control of the solve path when you use a negative constraint. I can definitely say that the solve path I intended was quite different from your path. Thank you for the solve nonetheless, I enjoyed watching your alternate steps which were crazy difficult 😜 Part of the idea of the start was that the two 5s got pushed into the cells with the three even digits making quadruples of 2456 in box 5 and 4568 in box 9. These quads greatly help in placing the 13 pair in column 3 for example. Additionally, at the end of the solve, the obvious thing you were missing was that the quad in box 9 (4568) made pairs of odd digits in column 7 and row 7. Also the weird step you did in row 8 was due to the fact that you were trying to put two 2s into the same row with the incorrect crisscross pattern in columns 2/3/4.
The times I was screaming was when you weren't seeing for a very long time where the 8 had to be in the left center box (because there couldn't be a third adjacent odd horizontally) and when you didn't see the 13 pair in the bottom row forced the 9 into the leftmost square (showing 139) on that row. Not too bad all things considered.
Well they say that you lose control of the solve path when you use a negative constraint. I can definitely say that the solve path I intended was quite different from your path. Thank you for the solve nonetheless, I enjoyed watching your alternate steps which were crazy difficult 😜
Part of the idea of the start was that the two 5s got pushed into the cells with the three even digits making quadruples of 2456 in box 5 and 4568 in box 9. These quads greatly help in placing the 13 pair in column 3 for example.
Additionally, at the end of the solve, the obvious thing you were missing was that the quad in box 9 (4568) made pairs of odd digits in column 7 and row 7. Also the weird step you did in row 8 was due to the fact that you were trying to put two 2s into the same row with the incorrect crisscross pattern in columns 2/3/4.
NICE PUZZLE
Interesting to see some combination of Sudoku and Tango.
The times I was screaming was when you weren't seeing for a very long time where the 8 had to be in the left center box (because there couldn't be a third adjacent odd horizontally) and when you didn't see the 13 pair in the bottom row forced the 9 into the leftmost square (showing 139) on that row. Not too bad all things considered.
The orange and magenta colouring look very similar to me on low brightness while watching before bed