Avrukh: 1.d4 Grandmaster Repertoire 1A - The Catalan (paperback)When Boris Avrukh released the first volume of his 1. d4 repertoire in 2008, it revolutionized chess opening books. As GM Michael Adams said: The high quality Grandmaster Repertoire series has taken this format to a completely different level. Or as GM Glenn Flear put it: This book represents nothing short of a technological advance in chess opening theory. Now Avrukh is back with an expanded, updated and revamped 1. d4 repertoire. Volume 1A deals