Dee ihe ga-aga n'ihu maka paragraf a - N'iji ya tụnyere asọmpi ndị buru ibu n'oge gara aga dịka asọmpi egwuregwu London 1851, asọmpi egwuregwu London 1862
na Paris 1867 chess tournament, e nwere abụọ isi innovations: chess elekere e ji mee ihe maka oge mbụ (20 aga-mere kwa hour), na draws gụrụ dị ka ọkara ihe.