Game Description

Sudoku Christmas is a classic Sudoku game. Players need to infer all the numbers with the remaining spaces based on the known numbers on the 9X9 board, and satisfy that the numbers in each row and column contain 1-9, and the numbers Not repeating. Give certain known numbers and problem-solving conditions in these 81 boxes, use logic and reasoning, and fill in the numbers 1-9 in the other blanks. Make each number 1-9 appear only once in each row and column. The objective is to fill a selected gri