black knight
US /ˌblæk ˈnaɪt/
UK /ˌblæk ˈnaɪt/

1.
caballo negro
a chess piece, typically black, that moves in an L-shape, two squares in one direction (horizontally or vertically) and then one square perpendicularly. It is represented by a horse's head.
:
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The black knight jumped over the pawn to attack the queen.
El caballo negro saltó sobre el peón para atacar a la reina.
•
He moved his black knight to a strong central position.
Movió su caballo negro a una fuerte posición central.
2.
caballero negro, caballero villano
a mysterious or villainous knight, often depicted in medieval legends or fantasy literature, who is not aligned with any particular side or is an antagonist.
:
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The legend tells of a fearsome black knight who roamed the cursed forest.
La leyenda cuenta de un temible caballero negro que vagaba por el bosque maldito.
•
In the story, the hero must face the mysterious black knight to save the kingdom.
En la historia, el héroe debe enfrentarse al misterioso caballero negro para salvar el reino.