The Collaborative International Dictionary
Chesses
Chesses \Chess"es\, n. pl. [Cf. F. chassis a framework of
carpenty.] (Mil.)
The platforms, consisting of two or more planks doweled
together, for the flooring of a temporary military bridge.
--Wilhelm.
Note: A singular, chess, is sometimes used. ``Each chess
consists of three planks.''
--Farrow.
Wiktionary
chesses
n. (plural of chess English)