Complex sentence: Chess is believed to have originated in India sometime before the 7th century, being derived from the Indian game chaturanga, the likely ancestor of the Eastern strategy games xiangqi, janggi, and shogi.
Split into simpler sentences: Chess is believed to have originated in India sometime before the 7th century, being derived from the Indian game chaturanga. Chaturanga is also the likely ancestor of the Eastern strategy games xiangqi, janggi, and shogi.