c1, d1, or e1, but not f1. A rider's corresponding leaper can be thought of as a limited ranging piece with a range of 1: a wazir is a rook restricted to moving only one square at a time. The violent ox and flying dragon from dai shogi (an ancient form of Japanese chess) are a range-2 rook and a range-2 bishop respectively. There are other possible generalisations as well; the picket from Tamerlane chess moves like a bishop, but at least two squares (thus it cannot stop on the square next to it, but it can be blocked there.) These are in general called ski-pieces: the picket is a ski-bishop. A skip-rider skips over the first and then every odd cell in its path: it cannot be blocked on the squares it skips. Thus a skip-rook would be a dabbabarider, and a skip-bishop would be an alfilrider. A slip-rider is similar, but skips over the second and then every even cell in its path. In some shogi variants (variants of Japanese chess), there are also area moves. These are similar to limited ranging pieces in that the pieces with such moves repeat one kind of basic step up to a fixed number of times, and must stop when they capture. However, unlike other riders, they may change direction during their move, and do not have a fixed path shape like riders or bent riders do. Hoppers A hopper is a piece that moves by jumping over another piece (called a hurdle). The hurdle can be any piece of any color. Unless it can jump over a piece, a hopper cannot move. Note that hoppers generally capture by taking the piece on the destination square, not by taking the hurdle (as is the case in checkers). The exceptions are locusts which are pieces that capture by hopping over its victim. They are sometimes considered a type of hopper. There are no hoppers in Western chess. In xiangqi (Chinese chess), the cannon captures as a hopper along rook lines (when not capturing, it is a (0,1)-rider which cannot jump, the same as a rook); in janggi (Korean chess), the cannon is a hopper along rook lines when moving or capturing. The grasshopper moves along the same lines as a queen, hopping over another piece and landing on the square immediately beyond it. Yang Qi includes the diagonal counterpart of the cannon,