noun / verb
checkmate
chek-MAYT/tʃˈɛkmˌeɪt/
A chess position leaving an attacked king without escape.
The queen delivers checkmate to the trapped king.

Etymology
Old French eschec mat named the king’s inescapable defeat. The underlying expression was understood as “the king died,” but if Persian is the ultimate source, its image is instead a helpless or stumped king.
In context
then after King d8 rook to b8 which is checkmate King cannot come up anymore
More examples
- She checkmated her opponent.
- The legal ruling checkmates the scheme.
- Their maneuver produced a decisive checkmate.
Forms
checkmate · checkmates · checkmated · checkmating
Similar words
- check
- Threatens the king but may allow escape.
- stalemate
- No legal move when the king is not in check.