Isolate (puzzle)

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An Isolate puzzle with area sizes beneath...
...and its solution walls marked in red.

Isolate is a logic-based line-placement puzzle. The puzzler is provided with a grid containing walls, dots and a set of area sizes. A solved grid will contain areas of the given sizes containing two dots each.

The puzzle was invented by an English puzzle enthusiast, Laurence May, in 2007. It is produced by Vexus Puzzle Design and appears daily along with Sudoku and Kakuro in the Daily Mail.


The Isolate grid must be partitioned into areas so that each area contains two dotted squares. Area sizes must match those shown below the grid and each + sign must be linked to at least two walls.

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