That was short - back again! Although my grid is now filled I still have only 8 of the specials ,
(9,1) (28,2) (4,29) (5) (6) (7) (22,24) and (28,23)
Cannot for the life of me see where the 9th is. Sorry if have given too much away by listing the above . If I have please accept my apology!
Cheers