Shannon also estimated the number of possible positions, "of the general order of 64 ! 32 ! 8 ! 2 2 ! 6 {\displaystyle \scriptstyle {\frac {64!}{32!{8!}^{2}{2!}^{6}}}} , or roughly 1043". This includes some illegal positions (e.g., pawns on the first rank, both kings in check) and excludes legal positions following captures and promotions.