May I Start By Thanking All Those Who Have Helped Me In The Past And Of Course This Evening Also.
Every Puzzlers Nightmare. Repetition of Numbers In Columns
The Sudoku is a 16 by 16 - Letters A to F
Numbers 0 To 9
The problem Seems to be In Third Grid At The Top
7 And 8 Causing Repeats
Eg
3 2 C
E 9 D A
F 5 6 O
4 1. B 7 and 8 Go Into Blank Spaces in Box
Could The Fourth Box On Second Row Be Wrong ie
4 5 9 6
A 8 C 2
B O F 1
3 7 E D
Maybe 4 and 5 Are In Wrong Place
I've tried everything.
Again I would greatly appreciate Help.
Once again I Wish To Thank all Concerned.