Look for areas with easy solutions (hanging fruit)
Look for places where it is easiest to write the number. This is usually a square, row, or column where almost all the numbers are already written in, all that's left is to write one. For example, you have a square with the numbers 2, 3, 4, 5, 6, 7 and 8. A quick analysis suggests that you need to write in cells 1 and 9. As a rule, in Sudoku for beginners almost always works this kind of lifehack.
Below is an example with "hanging fruit". The left center square contains 4, 8, 2, 1, 7, 9, 3 and 5. Accordingly, all that is left is to fill one cell with the missing digit. In our case it is 6. When we have inserted the 6 into the square, let's see what happens in the column and in the row. The column contains 9, 7, 4, 6, 3, 2. The row contains 6, 1, 7, 5, 9, 3. There are no obvious solutions to which numbers should be inserted. Let's move on and look for other sections.
Use the elimination method
In solving both easy and hard Sudoku, it is recommended to use the method of elimination. That is, you need to look at what numbers are already in the row/column/square. The rules of the puzzle are based on the fact that the numbers should not be repeated.
Accordingly, we analyze what values are missing (not only in the target row, but also in the column and square). For example, in the bottom row we have 7, 4, 9, 6, 1 and 5. In the empty three cells we can place 2, 3 or 8. We see that we already have a 2 in the penultimate column (7, 5, 2, 9, 6). Accordingly, either 3 or 8 can be placed in the row.
Not guessing, thinking
Sudoku is a puzzle in which there is no room for guessing. The more "left numbers" are put into the cells, the harder it is to "find the truth". If you are not sure that the number fits the square or row, it is better to move to another sector.
Move even if things are difficult
Sudoku is a puzzle that rewards a "keen eye". It often gives the impression that the process of unraveling is "deadlocked". If it seems that nothing seems to work in a square, move to another sector. If you have a feeling that you are not doing well there, you can put sudoku aside and try to rest.
As a rule, there are no unsolvable sections in Sudoku. Most likely, you just don't notice something. So start scanning the areas where there are no numbers. You may be able to find patterns and discover a "potential clue".
Переосмысливать каждое изменения
К примеру, поставили новое число на сетке. Оно изменило не только расклад в строке, но и в столбце, а также в квадратах. Нужно остановиться на пару минут и подумать: что изменилось сейчас, какие значения можно добавить?
Каждое новое число открывает возможности для того, чтобы вписать больше чисел в соседних строчках, квадратах и столбцах. А это значит, что и разгадка паззла будет быстрее.
Судоку – интеллектуальное развлечение, которое включает логику, заставляет «шевелить извилинами». Игра создана для того, чтобы активировать работу левого полушария мозга. Но в то же время головоломка подходит для того, чтобы поддерживать гибкость ума и трезвость рассудка даже в преклонном возрасте.
А какие советы вы используете для того, чтобы решать судоку? Делитесь в комментариях!
