According to The Chess Variant Pages : Perhaps the enduring popularity of shogi can be attributed to its `` drop rule '' ; it was the first chess variant wherein captured pieces could be returned to the board to be used as one 's own .
According to ChessVariants.com , `` Perhaps the enduring popularity of Shogi can be attributed to its ` drop rule ' ; it was the first chess variant wherein captured pieces could be returned to the board to be used as one 's own .