Mark and Simon have just finished a game of Connect 4. They are both too clever for each other, and so it resulted in a draw; the board became full of an equal number of red and yellow discs without either of them managing to get any horizontal, vertical or diagonal connected line of 4 discs of their colour. Recreate the end board state by colouring the holes red and yellow. The first two moves have been shown. Fill the discs with the digits 1-7 so that no digits repeat in any row or column. A digit on an arrow disc indicates the total number of discs in the indicated directions (combined) that match its own colour. (The arrow disc itself isn't included in the count.) Two orthogonally adjacent red discs must be of different parity (one odd digit and one even digit.) Two orthogonally adjacent yellow discs must have a difference of at least 3.