▁North ▁America ▁as ▁a ▁Col t ▁M 1 9 1 1 ▁p istol .) ▁ ▁Ro pe ▁ ▁W rench ▁( dep icted ▁as ▁a ▁mon key ▁w rench ▁in ▁North ▁American ▁ed itions ; ▁and ▁an ▁open - ended ▁sp anner ▁in ▁some ▁traditional ▁UK ▁versions ) ▁ ▁Ro oms ▁There ▁are ▁nine ▁rooms ▁in ▁the ▁m ansion ▁where ▁the ▁murder ▁can ▁take ▁place , ▁laid ▁out ▁in ▁circular ▁fashion ▁on ▁the ▁game ▁board , ▁separated ▁by ▁path ways ▁over la id ▁by ▁playing ▁spaces . ▁Each ▁of ▁the ▁four ▁corner ▁rooms ▁contains ▁a ▁secret ▁passage ▁that ▁leads ▁to ▁the ▁room ▁on ▁the ▁opposite ▁diagonal ▁corner ▁of ▁the ▁map . ▁The ▁centre ▁room ▁( o ften ▁referred ▁to ▁as ▁the ▁Cell ar ▁or ▁St airs ) ▁is ▁in access ible ▁to ▁the ▁players , ▁but ▁contains ▁the ▁solution ▁en velope , ▁and ▁is ▁not ▁otherwise ▁used ▁during ▁game ▁play . ▁Col oured ▁" start " ▁spaces ▁enc irc le ▁the ▁outer ▁per imeter ▁which ▁correspond ▁to ▁each ▁player ' s ▁suspect ▁token . ▁Each ▁character ▁starts ▁at ▁the ▁corresponding ▁col oured ▁space . ▁ ▁† ▁ ‡ ▁denote ▁secret ▁pass ages ▁to ▁opposite ▁corner ▁ ▁R ules ▁At ▁the ▁beginning ▁of ▁play , ▁three ▁cards — one ▁suspect , ▁one ▁room , ▁and ▁one ▁weapon — are ▁chosen ▁at ▁random ▁and ▁put ▁into ▁a ▁special ▁en velope , ▁so ▁that ▁no ▁one ▁can ▁see ▁them . ▁These ▁cards ▁represent ▁the ▁facts ▁of ▁the ▁case . ▁The ▁remainder ▁of ▁the ▁cards ▁are ▁distributed