View source for Farm Trail

[[File:Farm_Trail-01-sam.jpg|200px|thumb|right|'''Farm Trail''' example, From: 23rd WPC Instrucion Booklet © 2014, UK Puzzle Association]]

'''Farm Trail'''(待定中文名：農場小路) 。

==Rules / 规则==
The grid represents a farm which is divided into fields. Certain cells are occupied by an animal and these cells cannot touch orthogonally. The number of animals in each field is given. Deduce the positions of the animals and draw a trail which starts and ends at the flag in the top left corner of the grid and visits every cell except for those occupied by a tree or an animal. The trail moves orthogonally between the centre of cells and does not touch or cross itself. Once the trail leaves the first field, it enters the remaining fields exactly once each before returning to the first field again.
這表格代表分成數個區塊的農場。某些格子豢養了動物, 而這些格子彼此不得以邊相接。題目已提供了數字, 代表在每個區塊中有多少格有動物。請推導出動物所在位置, 並且從表格左上角的旗幟開始, 畫一條環狀的路徑回到原點。這條路徑必須經過表格中除了樹及動物以外的每個格子。而路徑本身只能直向或橫向連接, 且不能碰到或跨越自己。另外, 當路徑離開了第一個區塊後, 在回到第一區塊之前。它到每個區域只能經過一次(譯注: 也就是除了第一區塊外, 不能去了別的區域後又回來原來的區域)。

==Solving techniques / 解题技巧==
*因為每一區都只能經過一次, 代表只要一走進去就要走完全部的格子才能再走到下一區, 進去和出來各只有一次的機會, 所以從第一區走出及回來不能是去同一區, 同理別區也是, 如此就可以比較快判斷出來路線大致的走法。
*再來動物的位置因為不能相鄰, 所以只要標示出來, 它的上下左右四格就標上點代表是路線。最後有些區域比較狹長, 此時中間的格子就一定不能是動物, 因為它會造成兩端的路線斷開(但路線要一次走完)。

[[File:Farm_Trail-01-sol.jpg|200px|thumb|right|'''Farm Trail''' example, From: 23rd WPC Instrucion Booklet © 2014, UK Puzzle Association]]

==History / 历史==
*曾出現於第23屆WPC Round 2 第7題

==See also / 相关词条==
*[[Woodland Trail]]


==References / 参考资料==
*[http://www.uk2014.org/] 23rd WPC 官網

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

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[[Category:Make_the_Loop]]