▁turn ▁his ▁P ET ▁into ▁a ▁ch ess ▁computer ▁through ▁custom ▁software . ▁Therefore , ▁he , ▁together ▁with ▁a ▁friend ▁who ▁also ▁owned ▁a ▁P ET ▁ 2 0 0 1 , ▁created ▁the ▁ch ess ▁game ▁B oss . ▁The ▁game ' s ▁development ▁was ▁originally ▁meant ▁to ▁be ▁a ▁h ob by ist ▁project . ▁This ▁changed ▁when , ▁in ▁ 1 9 8 1 , ▁Com mod ore ▁International ▁released ▁the ▁V IC - 2 0 , ▁a ▁new ▁computer ▁that ▁used ▁the ▁same ▁processor ▁as ▁the ▁P ET ▁( the ▁M OS ▁Technology ▁ 6 5 0 2 ) ▁but ▁was ▁addition ally ▁fitted ▁with ▁a ▁video ▁chip ▁capable ▁of ▁present ing ▁high - resol ution ▁colour ▁graphics . ▁Com mod ore ▁International ▁had ▁released ▁several ▁software ▁modules ▁for ▁the ▁V IC - 2 0 , ▁none ▁of ▁which ▁covered ▁a ▁ch ess ▁programme , ▁where fore ▁Sch ä fer ▁decided ▁to ▁create ▁a ▁V IC - 2 0 ▁conversion ▁of ▁B oss , ▁which ▁he ▁would ▁try ▁to ▁sell . ▁To ▁do ▁so , ▁Sch ä fer ▁founded ▁King soft ▁GmbH ▁in ▁ 1 9 8 2 ▁from ▁his ▁parents ' ▁house ▁in ▁Mul art sh üt te , ▁a ▁district ▁of ▁A achen ' s ▁Ro et gen ▁sub urb . ▁ ▁King soft ▁established ▁a ▁direct - to - customer ▁distribution ▁system , ▁using ▁B oss ▁at ▁ 9 0 0 ▁DM , ▁as ▁their ▁first ▁commercial ▁product . ▁A ▁small ▁advert is ement ▁was