FIANCHETTO is validvalid

to develop a chess bishop by moving it one step to a main diagonal [v FIANCHETTOED, FIANCHETTOES, FIANCHETTOING, FIANCHETTOS]

128,179 of 196,601 in NWL2023·also valid in CSW24

(Italian) in chess, the development of bishop on the N2 diagonal [n FIANCHETTOS or FIANCHETTI] / to develop the bishop [v -ED, -ING, -ES]