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2020-06-04T04:12:34Z

Created page with "The term '''defining set''' is used when describing fish patterns. A fish pattern has 2 interacting sets of constraints. These are usually rows or columns, bu..."

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The term '''defining set''' is used when describing [[fish]] patterns.

A fish pattern has 2 interacting sets of [[constraint]]s. These are usually [[row]]s or [[column]]s, but modern fish variations also use [[box]]es. The 2 sets are equal in size. One of the sets is the '''defining set''' and the other is the [[secondary set]].

In a fish pattern, the '''defining set''' of constraints has candidates for the selected [[digit]] which are located only within the constraints of the '''secondary set'''. The secondary set has surplus candidates which are not located inside the defining set. These surplus candidates can be eliminated.

So for example in an [[X-wing]] the above would equate to this :
In an X-wing pattern, the defining set (rows) has candidates for the selected digit which are located only on the columns of the secondary set. The columns have surplus candidates and these can be eliminated.

Defining set - Revision history

Rooted: Created page with "The term '''defining set''' is used when describing fish patterns. A fish pattern has 2 interacting sets of constraints. These are usually rows or columns, bu..."