However, there are a few difficulties with this commonly accepted view. First, the variants are usually played with unequal numbers of pieces, the attackers being twice as numerous as the defenders. seems likely to have been played with equal numbers on both sides. Secondly, some claim that the games, especially , were often played with a die, made of a sheep's knucklebone, and this feature seems absent in . In Wales, a clear distinction is made between and , which, if also true of Ireland, would tend to indicate a similar distinction between and .