Patent ID: 7147555

Claim:
An electronic board comprising: a grid of grid points on a flat surface, where each grid point is a visible element which is capable of detecting when it is pressed, and can be illuminated in two different colours, by an illumination source inside or below the surface; which exhibits a behavior which makes it useful for playing various games; and in one of these games the behaviour of the board is as follows: the board keeps a record of one of the two colours above as the current player's colour; the board keeps a record of a fixed number; when a point is pressed, the board checks if it is a legal move, and if it is switches the point to the current player's colour, and changes the current player's colour record to the other colour; to evaluate if a point is a legal move, the board checks in turn each of a pre-defined set of imaginary straight lines emanating from the point, assigning a value of 0 to each of these lines that does not pass through an illuminated point, a value of 1 if the closest illuminated point that said line passes through is illuminated with the current player's colour, and −1 if said closest illuminated point is illuminated in the other colour, and then compares the sum of the values of all the lines to said fixed number, and if the sum is larger or equal to said fixed number, the point is a legal move; when there is no more legal moves, the board declares as winner the colour in which more points are illuminated.