You want the answer??!?!!??
rarest move in chess
its declaring a nuclear war and launching a missile to the queen
totally not based of intercontinenetal ballistic missile
according to https://www.youtube.com/watch?v=iDnW0WiCqNc
it says that it is either doubli disambiguated bishop capture checkmate
or the same thing with knights
both happened 0 times on lichess
what do you think it is?