Here you can configure application settings: 

A square matrix filled with different elements (Colors) will be displayed on the screen.

Your task is to use the "drag and drop" action to move the elements of the matrix to such a position that each element of the matrix appears exactly once in each row and exactly once in each column.

Additionally, like in classic sudoku, the objective is to fill a 9 × 9 grid with digits so that each column, each row, and each of the nine 3 × 3 subgrids that compose the grid (blocks, boxes) contain all of the digits from 1 to 9. These 9 blocks are painted in different background colors.

The buttons to go to the next item and return to the previous item (if enabled) are located at the bottom of the screen.

It is not allowed to return to the previous task.

As the demo mode is on, the elements of the matrix will be placed in the correct position.

Results by items:

For each completely correct item, the number of points is obtained, which is equal to the number of elements of the matrix (number of rows × number of columns). Otherwise 0 points.

Descriptive statistics:

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