The rat can move into the river. It is the only animal able to go into the river and therefore, only the opponent's rat can eliminate it when it is in. The rat can not take animal opponent when going out of the river: it should already be on the dry land.
The lion and the tiger can jump over the river (there are two rivers on the game board), unless one of the two rats is in this river. If on the other side square stand animal with lower rank, it will be eliminated. The jump can occur in both length and width.
SPECIFICITY ETHNOLUDIE :
When you play against another player online, you must move your animal within two minutes maximum. When playing against the computer, there is no time limit.