Retro World Champion Sudoku Puzzle Solver Undefeated T-Shirt and Hoodie design by Turbo Volcano features a vintage washed and worn distressed logo for old school sudoku game playing! Best gift for sudoku lovers, great sudoku gift for players of all ages. Win at sudoku while wearing this classic, funny t-shirt and hoodie design that says World Champion Sudoku Puzzle Solver All-Pro Undefeated! 8.5 oz, Classic fit, Twill-taped neck