Pickard Sid. ECO: Busted! 535 Refutations, Re-Evaluations, Novelties, Improvements and Corrections to the Encyclopedia of Chess Openings

Dallas: Hays Publishing, 1993. — 244 p. — ISBN: 1880673924.Although E.C.O. is the Bible of modern opening theory, there have been numerous discoveries, both from tournament and postal play, since the latest editions. In these pages you will find hundreds of splendid opening traps, reversals, and pitfalls. The book covers virtually every opening played today, and the serious competitor is advised to study it in self-defense. After all, that's exactly what your opponents are doing!