 Rowson writes that " in general one would assume that whatever advantage White has would be revealed most clearly in symmetrical positions . " Accordingly , Watson , Suba , Evans , and the eminent player and theorist <unk> <unk> ( 1886 – 1935 ) have all argued that it is in Black 's interest to avoid symmetry . Nonetheless , even symmetrical opening lines sometimes illustrate the tenuous nature of White 's advantage , in several respects . 
