{"id":126,"date":"2023-08-01T12:03:42","date_gmt":"2023-08-01T10:03:42","guid":{"rendered":"https:\/\/actilud.com\/info\/en\/?p=126"},"modified":"2025-03-29T12:06:42","modified_gmt":"2025-03-29T11:06:42","slug":"square","status":"publish","type":"post","link":"https:\/\/actilud.com\/info\/en\/square\/","title":{"rendered":"Square"},"content":{"rendered":"

The square is one of the simple solving techniques that works within a grid. Finding them requires a keen eye!<\/p>\n

The principle<\/h1>\n

Some false<\/em> sign configurations can leave empty boxes on rows, boxes which must contain a <\/em>true<\/em> sign\u00a0 :<\/em><\/p>\n

\"\"<\/p>\n

Look at the yellow boxes forming a square: there must be at least one true<\/em> sign in column b4, and another in column b5:<\/em><\/p>\n

\"\"\"\"<\/p>\n

We note that there are boxes which are always false,\u00a0<\/strong> whatever the position of the true<\/em>\u00a0<\/em> signs : \"\"When we encounter this square configuration, we can therefore fill the boxes outside the square with false signs.<\/p>\n

Attention<\/h1>\n

The rows do not need to be close together:<\/p>\n

\"\"<\/p>\n

Where are the false squares? Actilud’s step-by-step solver gives us the answer:<\/p>\n

\"\"<\/p>\n

Squares aren’t necessarily 2 x 2, even though they’re the most numerous. Here’s a 3×3 square… Of course, in most cases, the squares are well hidden. Can you find the false squares in the <\/em>following<\/em> grid? There are 4 left to discover…\"\"<\/p>\n

\"\"<\/p>\n