9 ▁to ▁the ▁mid - 1 9 8 0 s . ▁The ▁jack pot ▁started ▁at ▁$ 2 0 0 ▁and ▁increased ▁by ▁$ 1 5 ▁per ▁contest ant ▁until ▁it ▁was ▁won . ▁St rike ▁or ▁sp ares ▁earned ▁$ 2 0 ▁for ▁the ▁bow ler ▁and ▁pin ▁pal . ▁ ▁An ▁open ▁frame ▁was ▁scored ▁as ▁per ▁five ▁pin ▁rules ▁and ▁$ 1 ▁per ▁pin ▁was ▁awarded . ▁If ▁a ▁spare ▁was ▁made ▁then ▁a ▁third ▁ball ▁would ▁be ▁allowed ▁- ▁if ▁this ▁ball ▁was ▁a ▁strike , ▁the ▁prize ▁was ▁$ 4 0 . ▁In ▁the ▁initial ▁running ▁of ▁the ▁show , ▁if ▁the ▁first ▁strike ▁was ▁achieved ▁and ▁the ▁second ▁strike ▁missed , ▁the ▁turn ▁was ▁over ▁and ▁the ▁prize ▁was ▁$ 2 0 . ▁ ▁Later ▁on , ▁if ▁the ▁first ▁strike ▁was ▁achieved ▁and ▁the ▁second ▁strike ▁missed , ▁the ▁bow ler ▁could ▁attempt ▁a ▁spare . ▁ ▁If ▁the ▁spare ▁was ▁made , ▁the ▁prize ▁was ▁$ 4 0 . ▁The ▁bow ler ▁must ▁throw ▁three ▁consecutive ▁strik es ▁to ▁win ▁the ▁jack pot . ▁If ▁a ▁third ▁strike ▁attempt ▁was ▁missed , ▁the ▁prize ▁was ▁$ 4 0 . ▁Each ▁ 3 0 - min ute ▁episode ▁consisted ▁of ▁seven ▁bow lers . ▁ ▁One ▁bow ler ▁among ▁the ▁seven ▁would ▁be ▁selected ▁at ▁random ▁as ▁the ▁Bon us ▁Bow ler . ▁If ▁the ▁Bon us ▁Bow ler ▁won ▁the ▁jack pot , ▁they ▁won ▁an ▁array ▁of ▁additional ▁mer ch and ise ▁and ▁services