16x16 Sudoku solution.

I claim to have solved from scratch, without a computer, a 16x16 Sudoku.

sudoku16

I have produced a solution from scratch for a sudoku 16, the 16x16 analog of the 9x9 sudoku commonly seen in the papers. I used my own character set of 16 characters. I think it would have been harder using hexadecimal--0-9 plus A-F.