▁Ro ok ▁position ▁by ▁moving ▁the ▁ro ok ▁on ▁the ▁player ' s ▁first ▁move . ▁ ▁It ▁is ▁common ▁for ▁a ▁St atic ▁Ro ok ▁position ▁to ▁be ▁played ▁against ▁Central ▁Ro ok . ▁ ▁White ▁moves ▁their ▁king ▁away ▁from ▁its ▁more ▁dangerous ▁start ▁position . ▁The ▁more ▁usual ▁move ▁here ▁would ▁be ▁for ▁White ▁to ▁open ▁their ▁bishop ▁diagonal ▁in ▁order ▁to ▁prevent ▁Black ▁from ▁trad ing ▁pa wn s ▁on ▁the ▁second ▁file . ▁However , ▁Prim itive ▁Central ▁Ro ok ▁keeps ▁their ▁bishop ▁diagonal ▁closed ▁initially ▁allowing ▁Black ▁to ▁make ▁the ▁pa wn ▁trade . ▁ ▁Since ▁White ▁didn ' t ▁respond ▁to ▁Black ' s ▁ro ok ▁pa wn ▁push , ▁Black ▁continues ▁adv ancing ▁their ▁ro ok ▁pa wn ▁aim ing ▁for ▁a ▁pa wn ▁trade . ▁▁ ▁White ▁must ▁protect ▁the ▁head ▁of ▁their ▁bishop ▁with ▁their ▁gold ▁from ▁the ▁threat ▁of ▁Black ' s ▁adv ancing ▁pa wn . ▁( To ▁ignore ▁this ▁threat ▁is ▁a ▁bl under .) ▁ ▁After ▁White ' s ▁prepar ation , ▁Black ▁starts ▁the ▁pa wn ▁trade . ▁ ▁After ▁the ▁trade , ▁White ▁dro ps ▁their ▁pa wn ▁to ▁push ▁Black ' s ▁ro ok ▁back . ▁ ▁Black ▁retre ats ▁their ▁ro ok ▁to ▁its ▁start ▁position , ▁and ▁White ▁continues ▁moving ▁the ▁king ▁to ▁safety . ▁ ▁Black ▁moves ▁their ▁right ▁silver ▁closer ▁to ▁the ▁middle ▁of ▁the ▁board ▁in ▁response ▁to ▁a ▁R anging ▁Ro ok ▁oppon ent ▁and ▁starts ▁to ▁castle ▁their ▁king