mahjong - pieces underneath of others means you dont know what they are and your picks reveal random pieces, so it is luck, the skill portion is finding the matches
draughts - you cant say if one board game is a sport then every other one is too, checkers does not require the same level of mental discipline, so it really is not physically exerting, and matches don't take hours like chess. That is because checkers is a very simple game, with the only moves being diagonally. checkers is akin to tic tac toe
halma - if it is popular in your country, good for you, if the world does not recognize the name of the game, chances are it will never be a sport
urban rivals - i was not referring to theme, if any ccg were to be a sport it would be mtg, but since card games rely mostly on luck, they are ruled out