Challenge wallpapers for desktop

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Image of the drawn puzzle elements

Image of the drawn puzzle elements

White horse and black horse

WHITE HORSE AND BLACK HORSE

Bowling ball knocks down the pins

Bowling ball knocks down the pins

Black and white billiard table

Black and white billiard table

Scarlet, ready for any challenges, he just merged with the black asphalt

Scarlet, ready for any challenges, he just merged with the black asphalt

Bowling ball and bowling pins on a dark background

Bowling ball and bowling pins on a dark background

A snooker player prepares to score a ball into the pocket

A snooker player prepares to score a ball into the pocket

Fearless forward to their goal ahead

Fearless forward to their goal ahead

Climber climbs over sunset

Climber climbs over sunset

Mirrored chess board and transparent chess pieces

Mirrored chess board and transparent chess pieces

Diamond pickaxe from minecraft in computer graphics

Diamond pickaxe from minecraft in computer graphics

Wallpaper with mosaic details for desktop

Wallpaper with mosaic details for desktop

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A call to take part in a contest or competition, especially a duel. An objection or query as to the truth of something, often with an implicit demand for proof. Exposure of the immune system to pathogenic organisms or antigens. Invite (someone) to engage in a contest. Dispute the truth or validity of. Expose (the immune system) to pathogenic organisms or antigens.