One Digit Field

One Digit Field is a puzzle game where you put numbers one by one in a 9x9 square while thinking carefully. The rules of the game are very simple, and the goal is to put numbers in all the squares according to the following placement rules. ・ 1 to 9 are lined up in one vertical row ・ 1 to 9 are lined up in a horizontal row ・ 1 to 9 should be placed for each 3x3 block This rule is similar to the …