Originally a physicist, in last twenty years experienced in computer chess achieved an (ICCF) correspondence chess master title (CCM). Lead-developer of chess opening book software Bookbuilder, https://sourceforge.net/projects/bookbuilder/ Some references (2014): - 'thank you for your good and serious work' (mr D, France). - "looking at the sample, I think this is a very good book. If I have to remember how I started to play, I think I should have this book around 3 months after learning the game. I am a d4 player but is interested now to try e4, this ebook is good for me" (someone in computer chess, F.M.) 'your book is impressive' (message from drunkenmasterB(C) on the Internet Chess Club (ICC)