Object:
Move the Rook piece from its starting square to the top-right end square.
As you move from square to square, each left behind square is randomly changed.
A departed numbered square will always be changed to a different, and valid, number.
The rook (or jumper) moves up/down and left/right. It moves precisely the number of squares as displayed by the numbered square it was landed upon.
The rook's opening move is uniquely open to leaping any distance. The exception is that a rook's first leap may not land directly upon the far row or column of the end square.
In these variants, the rook is randomly positioned towards the bottom left corner of the grid.

To start:
Click on any empty square to initiate a random setup.
At the start, there will be only one square along the top and right-side wings that can reach the finishing end square. However, there is no certainty as to an overall eligible preset path route.

Graphics note:
The included boards are vertically resized from the standard Zillions chessboard graphic. Each row was reduced by one pixel; horizontal sizing wasn't altered.
The included Rook piece was also vertically re-positioned to appear more centred within the board squares.

History:
Jump Mazes are a known style. In this variation, instead of guaranteeing a valid and complete opening route to the end square, I've included the ability of randomly drawn maze layouts to reset their last-departed numbered landing squares during gameplay.

A version of Sam Loyd's 1898 Back From the Klondike numbers maze is included, as is an original Hi-Lo variation built upon his 21x21 grid shaped board.
v1.3 note:
Having reached a limitation of grid directions, the ability of moving 7, 8 , and 9 steps is imperfect (for this particular subvariant) within the Zillions v1.3 version. It still functions, however invalid moves for 7, 8, and 9 steps are not restricted. A Zillions v2.0 version is included without these same flaws.