Bodlaender, Hans L.; Duniho, Fergus (1996-09-09). "Shogi: Japanese Chess". The Chess Variant Pages. Archived from the original on 2019-03-24. Retrieved 2012-03-08.
Bodlaender, Hans L.; Duniho, Fergus (1996-09-09). "Shogi: Japanese Chess". The Chess Variant Pages. Archived from the original on 2019-03-24. Retrieved 2012-03-08.