 More recently , IM Hans Berliner , a former World Champion of <unk> Chess , claimed in his 1999 book The System that 1.d4 gives White a large , and possibly decisive , advantage . Berliner asserted that with best play White wins against the <unk> Defense , the Modern <unk> , the <unk> Gambit and other ( unnamed ) " major defences " , and achieves at least a large advantage in many lines of the Queen 's Gambit <unk> . However , he allowed that , " It is possible that the rules of chess are such that only some number of plausible @-@ appearing defences to 1.d4 can be refuted . " Berliner wrote that Adams ' " theories , though looked upon with <unk> by most top chess players , made an immediate and lasting impression on me . Weaver W. Adams was the first person I met who actually had theories about how chess should be played . " 
