Welcome to Reversi (Othello)!! This is a 19th Century English game, with simple instructions - the gameplay is devious!!
Reversi (Othello) is played on an 8x8 board. The starting position is shown above. Each of the counters are blue on one side and red on the other. Possible moves are shown in green.
Moves are made by laying a counter, with the player's colour face-up, on an empty square, in such a way that at least one counter of the opposite colour is sandwiched between it and another counter of the player's own colour. This sandwiching can be either in a horizontal, vertical or diagonal direction, or both. The possible moves for blue are therefore as shown in green.
Blue plays first.