## Introduction

Today’s puzzle is NumberBlocks. If you are new to NumberBlocks, please read Rule and Tutorial of NumberBlocks first. Previous puzzles are available from link buttons below (Puzzles will be refreshed). A PDF file for print is also available at the end of this article.

NumberBlocks is a variant of Sudoku puzzles. So we have to place digits under the constraint that each column, each row and each region (surrounded by thick lines) contain each digit exactly only once. NumberBlocks does not contain any calculations. People of all ages can play with them.

We make all puzzles have **only one solution**.