3 is the correct answer and we have a tie on time between Dolflip and Rossy so points to you both
As per James suggestion I am giving an updated grid. I am sorry it is not totally in line but its the best I can do – I suggest you copy it – I will try and repeat it when updated but I may have trouble. I wanted to put a table on here but could not work out how to do it other than by saving an image. If anyone can help it would be appreciated.
? 7 ? ? ? ? 8 ? ?
? ? ? 2 ? 4 6 ? ?
? ? 6 ? ? ? 2 3 ?
? ? ? 5 ? ? 3 ? 6
9 3 8 7 6 2 1 4 5
? 5 ? ? 3 ? 9 ? ?
? ? 2 ? 8 ? 4 6 ?
? 6 ? 9 ? ? 7 ? 1
4 ? ? ? ? 3 5 ? ?
PLEASE FIND THE FOURTH SQUARE DOWN – SECOND ROW FROM THE RIGHT