/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: hideyukiw https://cdn.slidesharecdn.com/profile-photo-hideyukiw-48x48.jpg?cb=1523402055 I'm a Mathematician and Software Engineer. I love solving and composing various puzzles. For example, Rubik's cube-like puzzles, Mathematical puzzles, and chess and shogi proof games and so on.