Flip Flop (UK) (19xx) - Amstrad CPC - Puzzle, Strategy

Flip Flop is a challenging game requiring good strategy and plenty of practice. The object of the game is to be the one to 'flip' over the last black square. Beware! Your Amstrad is a ruthless opponent. The game is played on a 3x3 grid with a number in each of the nine squares. Every odd numbered square on the grid is coloured black and the others are coloured green. At the start of the game you can make the first move or pass. Each turn you must enter 2 digits with no separators, e.g: 58. The First Digit that you enter must be a number that is on a black square when you begin your turn. The Second Digit must follow one of 4 conditions. 1) It can be the same as the first digit. 2) It can be a number located to the right of the first digit's grid position. 3) It can be a number located below the first digit's grid position. 4) It can be any number located to the right of and below the position of the first digit's square. If you select a 2 digit number such as 77, then that will be the only square to flip over. Otherwise, all squares to the right of and below the first digit's position, inclusive will flip-flop.