Hirake Koma!

Takara, a young boy who lives with his mother, has an unusual gaming addiction for a child: shogi! Takara is a friendly, cheerful, quiet boy who spends much of his time studying shogi or playing matches with various people, many of whom are adults. His mother supports him in his interest, and Takara continues to learn about the game of shogi and the people who play it. (Source: MangaHelpers)