▁is ▁not ▁common ▁in ▁top - level ▁ch ess ▁but ▁can ▁be ▁a ▁dangerous ▁weapon ▁in ▁club ▁play . ▁ ▁The ▁Ch ig or in ▁Def ense ▁takes ▁the ▁game ▁away ▁from ▁the ▁normal ▁position al ▁channels ▁of ▁the ▁Q G D , ▁and ▁has ▁been ▁fav oured ▁by ▁Alexander ▁Mor o ze v ich ▁at ▁the ▁top ▁level ; ▁it ▁appears ▁to ▁be ▁play able ▁for ▁Black . ▁ ▁The ▁Balt ic ▁Def ense ▁is ▁off be at ▁but ▁play able . ▁ ▁The ▁Sym met rical ▁Def ense ▁is ▁very ▁rarely ▁played . ▁Although ▁it ▁has ▁not ▁been ▁definitely ▁ref uted , ▁the ▁play ▁seems ▁to ▁favour ▁White . ▁ ▁The ▁Marshall ▁Def ense ▁is ▁weak . ▁ ▁N amed ▁after ▁Frank ▁Marshall , ▁who ▁was ▁the ▁first ▁to ▁dev ise ▁the ▁move , ▁he ▁briefly ▁played ▁it ▁in ▁the ▁ 1 9 2 0 s ▁before ▁abandon ing ▁it . ▁▁ 2 ... g 6 ? ! ▁ 3 . cx d 5 ▁Q x d 5 ▁( 3 ... N f 6 ▁ 4 . Q a 4 ▁) ▁ 4 . N c 3 ▁Q a 5 ▁ 5 . N f 3 ▁B g 7 ▁ 6 . B d 2 ▁c 6 ▁ 7 . e 4 ▁Q b 6 ▁ 8 . B c 4 ▁B x d 4 ▁ 9 . N x d 4 ▁Q x d 4 ▁ 1 0 . Q b 3 ▁Q g 7 ▁ 1 1 . 0