What is the topic sentence of the following paragraph? chess is a challenging game that can be a lot of fun once someone learns to play. chess is believed to have originated before the seventh century in india. people all around the world have been playing chess ever since. two players are needed to play chess. to win chess, one player needs to get the other player in checkmate. a player is in checkmate when she cannot move her pieces without being attacked. chess is a challenging game that can be a lot of fun once someone learns to play. two players are needed to play chess. a player is in checkmate when she cannot move her pieces without being attacked. people all around the world have been playing chess ever since.