A farmer has an irregularly shaped field with four large stones. He wants to move the four stones to new positions in the field. His field is divided into little squares; each just large enough to contain a bulldozer, a stone, or nothing.
If the bulldozer is in a square immediately next to a stone, the bulldozer and the stone can each move one square (or several in a row) in the direction that they line up along. However, the bulldozer cannot move more than one stone at a time in this way. When not pushing a stone, the bulldozer can move horizontally or vertically through unobstructed squares.
Can you use the bulldozer to rearrange the stones so that they are moved to their new destinations?
Here is a diagram of the field. The bulldozer is marked by a B, each stone by an S and an identifying number, and their desired final locations by *. Squares marked by XX are woods, and cannot be used.
XX|XX|XX|XX|XX|XX|XX
--+--+--+--+--+--+--
XX|XX|XX|XX| | |XX
--+--+--+--+--+--+--
XX|XX|XX|XX|S1| |XX
--+--+--+--+--+--+--
XX|XX|XX| *| *| |XX
--+--+--+--+--+--+--
XX| |S2| *| *| |XX
--+--+--+--+--+--+--
XX| |S3|XX| | B|XX
--+--+--+--+--+--+--
XX| |S4| | | |XX
--+--+--+--+--+--+--
XX| | | |XX|XX|XX
--+--+--+--+--+--+--
XX|XX|XX|XX|XX|XX|XX
In this version of the diagram, the squares available for moves are numbered:
..|..|..|..|..|..|..
--+--+--+--+--+--+--
..|..|..|..|25|26|..
--+--+--+--+--+--+--
..|..|..|..|35|36|..
--+--+--+--+--+--+--
..|..|..|44|45|46|..
--+--+--+--+--+--+--
..|52|53|54|55|56|..
--+--+--+--+--+--+--
..|62|63|..|65|66|..
--+--+--+--+--+--+--
..|72|73|74|75|76|..
--+--+--+--+--+--+--
..|82|83|84|..|..|..
--+--+--+--+--+--+--
..|..|..|..|..|..|..
I give up, show me a solution.
You can go back to the main puzzle page.