What is the rarest move in chess?

Sort:
Avatar of SparKer_7

any idea?

Avatar of Lovely_Cupcake

Idk sorry

Avatar of AnAnLew
Castling checkmate.
Avatar of TapanJoshi100

the rarest move is a doubley disambiguated bishop capture checkmate its a one in 342 billion chance of it happening

Avatar of Pamvo7

possibly e1=B or d1=B