I'm software engineer. In the past chess player, used to play national championships. Currently chess stays just as a hobby. English is not my primary language, so my articles may contain even grammer mistakes, for which I apologize beforehand, I will try to correct them as soon as possible. I'm completely new to wikipedia, and really can't spend match time to edit/update the articles. I like wikipedia very much, and I often use it as a quick reference for my professional and non-professional purposes. I hope to input my small contributions to wikipedia, over lifetime.