The opening was advocated by the German player Siegbert Tarrasch, who contended that the increased Black enjoys is well worth the inherent weakness of the isolated center pawn. Although many other masters, after the teachings of Wilhelm Steinitz, rejected the Tarrasch Defense out of hand because of the pawn weakness, Tarrasch continued to play his opening while rejecting other variations of the Queen's Gambit, even to the point of putting question marks on routine moves in all variations except the Tarrasch (which he awarded an exclamation mark) in his book "Die moderne Schachpartie". (See chess punctuation.)