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What is an isosudoku?

Question asked by: mrquestion

Asked on: 07 Jan 2010

An isosudoku puzzle refers to a sudoku variant in which there are many partial regions.

These tend to be diagonal regions and it means that there are new solving rules to consider.

Most of all if a partial region has say seven cells in it then it doesn't mean that all numbers 1 - 9 appear but rather only seven. So if there is only one place that, say, 7 can appear it doesn't necessarily mean that cell must contain seven as it could be there is no seven in the partial region! However if there are only seven possible numbers that can be placed anywhere in the partial region then conversely it must be 7.

By: knowitall
Replied at: 07 Jan 2010
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