Crossword Genius

Pieces match, but not on paper (8)

Ross

I believe the answer is:

mentally

I'm a little stuck... Click here to teach me more about this clue!

'pieces match but not on paper' is the definition.
I can't judge whether this defines the answer.

'pieces match' is the wordplay.
'pieces' becomes 'men' (e.g. in chess).
'match' becomes 'tally' (synonyms).
'men'+'tally'='MENTALLY'

Can you help me to learn more?

(Other definitions for mentally that I've seen before include "Using the mind" , "how intelligence is developed" , "not physically" , "Intellectually" , "in the head" .)

I've seen this clue in The Sunday Times and The Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.