Slitherlink

Suriza (Japaneseスリザーリンクsurizā rinku, Eng. Slither link) is a mystery, which was first published by the Japanese magazine Nikoli.

Suriza is known also by other names, including: serpentine, Slither Link, Holy path, trail, Picket Fence, Fences and Number line.

Regulate

Suriza is played on a square grid. The grid points and the edges are usually marked or highlighted. The goal is to draw a closed path without junctions and branches of edges between the points of the grid. Here, in some squares are numbers between 0 and 3, which indicate how many edges shall be adjacent to the path to this field. Unmarked fields can contain any number from 0 to 3 and thus also any number of edges of the path to these fields may be present.

Normally, the solution or the searched path is uniquely determined by the given numbers.

Solution strategy

To solve a Suriza trying typically first determine small fragments of the search path, which can then connect gradually to larger sections. For example, must be between two fields, both of which include a three, a piece of this path lie. By logical reasoning can be so find some more rules.

Exactly two lines or 0 at each intersection

The key to the solution of Suriza is that exactly meet at each intersection of two lines, or any individual. You just tried consistently ruled lines. Was one somewhere in the game field interior (not the edge ) to exclude three lines of a point in the situation, it must be necessarily excluded the fourth line of this point. A point is always associated with 2 or 0 lines, otherwise you can not get to a main road.

Similarly, if a point on the sidelines (but not corner) already has two lines, which could be excluded, as the third line must also be excluded. For a vertex, if a line could be excluded, as well as the remaining second line must be excluded.

The application of these simple rules will result in disqualification of all the solutions Suriza jigsaw puzzles.

Eckfelder

In the example located in the top left corner square a 1 It may therefore only one of the four edges of this Eckfeldes be used for the path. This automatically excludes the left and the upper edge. Whether the lower or right edge must be used follows later.

In the top right corner square is a 3 The only way is to use three edges, when the upper and right edges with it are. So you can mark this already secure as part of the path.

But is located in a corner square a 2 so you can regard the edges of this field to make any statement, except that two edges ' corner ' with in the way. However, this means that you can mark as part of the way then the two leading edges on the edge already.

Fringe fields

In the example, there are right above three fields, each with a 3 directly with each other. There you can directly select the four horizontal edges as part of the path.