On this page you can find the solution to New York Times - Hard Sudoku of April 22 2018.
Sudoku is one of the most popular puzzle games ever. It is fun, entertaining and 100% logic based. The game, invented in Switzerland, gained popularity in Japan in the late 1980’s, where it was given its name: Sudoku is the short form of Su-ji wadokushinnikagiru, which can be translated into "the numbers must be single".
A classic 9x9 Sudoku puzzle tab is formed by 81 cells, which are divided into a total of 9 rows, columns, and regions (squares). The main goal of a 9x9 Sudoku game is to place numbers going from 1 to 9 in the cells so that they never appear more than once in each row, column and region. At the beginning of the game, you will be given 17, 22 or 30 numbers to guide your choices. What makes sudokus so fascinating and fun is that, no matter their difficulty, there is only one correct answer.