.d88888b.  8888888b.  8888888888 .d88888b.  
d88P" "Y88b 888   Y88b 888       d88P" "Y88b 
888     888 888    888 888       888     888 
888     888 888   d88P 8888888   888     888 
888     888 8888888P"  888       888     888 
888     888 888        888       888     888 
Y88b. .d88P 888        888       Y88b. .d88P 
 "Y88888P"  888        888        "Y88888P"  

• having no enclosing or confining barrier
• accessible on all or nearly all sides
• not covered with a top, roof, or lid
• having no protective covering
• not restricted to a particular group of participants
• enterable by both amateur and professional contestants