127.0.0.1: Created page with "An '''unavoidable set''' is a deadly pattern from the point of view of a puzzle maker, or somebody who likes to investigate solution grids. Take the following exa..."

2021-10-25T13:34:14Z

Created page with "An '''unavoidable set''' is a deadly pattern from the point of view of a puzzle maker, or somebody who likes to investigate solution grids. Take the following exa..."

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An '''unavoidable set''' is a [[deadly pattern]] from the point of view of a puzzle maker, or somebody who likes to investigate [[solution]] [[grid]]s.

Take the following example:
{{grid|2=1|5=2|12=2|14=1|29=2|30=1}}
If there were no [[given]]s in any of these 6 cells, the solver would eventually reach a point were a choice must be made how to place digits 1 and 2 in them. The conclusion would be that the puzzle has 2 possible solutions. It is ''unavoidable for'' the puzzle maker to place at least one given in one of these cells.
[[Category:Uniqueness]]

Unavoidable set - Revision history

127.0.0.1: Created page with "An '''unavoidable set''' is a deadly pattern from the point of view of a puzzle maker, or somebody who likes to investigate solution grids. Take the following exa..."