For most mathematicians, it is a difficult task to answer the question "What are you studying?", or even harder "What is it good for?". Algebraic geometry is one of the most abstract research areas in mathematics, and these kind of questions leave us speechless. But luckily, almost everyone knows what Sudoku is. It turns out that one can use algebraic geometry to solve these games via the so-called Gröbner bases. We will introduce this technique and apply it to some examples.