In Yonmoque Hex players try to be the first to get exactly 4 of their pieces in a row. And no more than that... Get 5 in a row and you immediately lose the game!
Yonmoque Hex applies the 'swapping mechanism' from Othello; opponent pieces that are trapped in between two of your own pieces are turned over so that they become your own. The differences with Othello are that you don't just place tiles on the board, you also move them around. Furthermore, placement and movement is determined by the colour of the fields of the board. There are fields in the colors of each of the players (white and blue), as well as 5 neutral fields. Given that there are less squares for the white player (8 versus blue's 12), the white player always gets to play the first move.