tenacious

good at remembering

Holding fast, or inclined to hold fast; inclined to retain what is in possession; as, men tenacious of their just rights.

Latin tenax, tenacis, clinging firmly

“Such embryos are not tenacious of existence, and when destroyed they are succulent food for a space to the moody grief I am describing.”

— George Meredith, Complete Project Gutenberg Works of George Meredith

“Spassky won the first game as Black in good style, but tenacious, aggressive play from Karpov secured him overall victory by +4−1=6.”