☆ The rules are easy! 1. The same number can not be entered in the same column of vertical and horizontal 2. Inequalities indicate the size of adjacent squares If you enter all the numbers correctly, the game clears! ☆ Brain training in a little gap time! Exquisitely refreshing with a simple UI! Let's do head exercises at your own pace to kill time of waiting! ☆ number of issues with great satisfaction! From simple questions to challenging puzzles, 300 well-selected good questions are included