View source for Pathfinder

[[File:Pathfinder_example.png|500px|thumb|right|'''Pathfinder''' example, From PuzzlePicnic.com]]

'''Pathfinder'''(待定中文名：控制机器人) was invented by Johan de Ruiter.

==Rules / 规则==
A robot is situated in an environment with heaps of stones. Everytime he gets somewhere he picks up one stone from that heap. To decide where he will go next, he looks around and determines the sizes of the heaps in the squares neighbouring directly horizontally or vertically. His programming tells him which heapsizes he prefers. He will never move to an empty square. In case multiple neighbouring squares have the highest priority, he can not choose and gets stuck. Program the robot such that he will at some point arrive at the grey endstation. Give the priorities of the heaps of different sizes from left to right from highest to lowest priority. We will solve a small puzzle as an example.

有一辆由程序控制的小车，将从盘面的左上角走到右下角，每一步可以选择往上下左右的一个方向前进一格，而每到一格会捡起其中的一颗石子，而往哪个方向走依赖于预先在小车内设置的程序，程序会设定一个优先级，即面对四个方向时如何选择。当四面都没用石子或者最优先的石子个数存在多重选择的时候，小车便无法再前进。你所需要做的就是判断出程序所设定的优先级。例题中根据程序设定的优先级，小车的走向是下右下右。

==Solving techniques / 解题技巧==
*To be edited

==History / 历史==
This puzzle type was invented by Johan de Ruiter and appeared for the first time at the world puzzle championships in 2003. 

本题型由Johan de Ruiter设计，首次出现在2003年世界谜题锦标赛中。

==See also / 相关词条==
*To be edited

==References / 参考资料==
*[http://www.puzzlepicnic.com/genre?pathfinder] PuzzlePicnic.com

==External links / 拓展阅读==
*To be edited

[[Category:Puzzlelist]]
[[Category:Arrangement]]