Sudoku is an ancient puzzle of Japanese origin. This game encourages logical-mathematical reasoning, in addition to stimulating strategic thinking. We usually find sudoku in crossword puzzles or in sudoku comics. The game idea is quite simple: fill a grid of 9 squares horizontally by 9 squares vertically so that in each row, in each column and in each major square, there are numbers from 1 to 9 without repeating any their. See the image below to avoid doubts:
Guidelines on Sudoku.
So let's try to solve a sudoku classified as easy. Our first action should be to investigate which rows, columns or squares have the least spaces to fill. Once this is done, we must analyze which numbers are missing and try to fill them.
Let's start solving this sudoku by filling in the colored cells first.
Starting from the central column, there are 3 numbers missing, they are: 1, 4 and 5. The number 4 it cannot be in the lower square, as there is already another number 4 there. Therefore, the light blue space must be filled with 4. The light green space cannot be filled with 1 as it already has the number 1 on its line. Therefore, in the green space, we must place the 5 and, below it, in the yellow space, we should put the 1. On the first line, there are still the numbers 3, 5 and 8. The number 5 can only be placed in the pink space, as in the third square there is already a number 5. The number 8 can only be placed in the purple space, as the orange column already has another 8.
We've already filled in some numbers, let's now fill in the new colored squares.
Let's try to complete the second line, it's still missing the numbers 1, 4 and 9. In the light pink space, we can place the 4, because in the first two columns there is already the number 4. In the beige space, we can put the number 9, because in the last square there is already another 9. Thus, for gray space, only the number remains 1. In the purple space, all that remains is for us to put the number 1 to complete that square.
We already have 10 cells filled, let's now fill the remaining cells.
We have already completed 10 spaces that were empty. Now try to fill in the spaces that are still vacant. Copy this game onto a sheet and fill it out. When finished, make sure there are no repeated numbers in the rows, columns or squares. Good luck!
