01 regular
WRO-2021-Regular-00-General-Rules
WRO-2021-Regular-01-Elementary
WRO-2021-Regular-02-Junior
WRO-2021-Regular-03-Senior
02 open category
WRO-2021-Open-00-General-Rules
WRO-2021-Open-01-Mission
03 football
WRO-2021-Football-00-General-Rules
WRO-2021-Football-01-Field
04 future engineers
WRO-2021-Future-Engineers-01-Game-Rules