Second-Degree Black Belt Sudoku(r)

<p>Everyone loves sudoku puzzles finding them impossible to put down. The only problem: having enough sudokus to solve! </p><p> Created in the United States these addictive conundrums were originally called Number Place puzzles until their recent rise in popularity in Japan where the name translated as sudoku. However in a true sudoku unlike a Number Place puzzle the grids are symmetrical. This trait makes for a more elegant solve. Every puzzle included inside is symmetrical which is not always the case in other sudoku books.</p><p> In this Martial Arts Sudoku series we've indicated the skill level necessary to complete each book in the same way Japanese karate levels are ranked: by different colored belts. This is the Second-Degree Black Belt volume filled with puzzles that will provide a sly absorbing test for even the best most proficient experts.</p><p> You'll go crazy for these super engaging brain bafflers!</p>