Just right! Of just the right degree of difficulty to the head of the gymnastics problem, we will question and crispy at any time. Such a problem does not solve it and not the people who know the joseki are not questions. If well considered, and questions the only problem that can be solved without fail.
Then, there is also automatically solved by me function, this is a Cho dependable! Any problem, we will solve always in less than one second. You can also you have to solved by setting the problem. When you try to set a problem that mathematicians of Finland is said to be world's most difficult to made, we were able to brilliantly solved in less than one second.