My husband and I were talking (in English) about chess the other day, and I referred to the game as 'them'. He asked me why, and I realized it was because chess in Russian – шахматы – is always plural. It's not the only word like that. For example, just like in English scissors and trousers are always plural, their Russian brothers are plural as well.
брюки - (formal) trousers
штаны - trousers, pants
джинсы - jeans
шорты - shorts
ножницы - scissors
плоскогубцы (пассатижи) - lineman's pliers
кусачки (острогубцы) - diagonal pliers, wire cutters
щипцы - tongs, pliers, hair crimper
вилы - pitchfork
ворота - gate, gates
очки - glasses
шахматы - chess
весы - weigh-scales
часы - clock, watch
носилки - litter, palanquin, stretchers
Ножницы is always plural.
деньги - money