Check 2 Square

描述

Put 2 check marks in every row and column. Each check mark has its own territory: The check marks must not touch each other horizontally, vertically and diagonally. So a square around any check may not contain another check

说明

By clicking you can place checks or supporting crosses or delete checks. Tip: Puzzling becomes easier if you know that 2 rows or 2 columns next to each other must contain 4 checks.

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