A board game for you and your mates? (5)
I believe the answer is:
chess
This might be a double definition.
'a board' is the first definition.
(chess board is a kind of board)
'game for you and your mates?' is the second definition.
I know that 'game' relates to this answer.
Can you help me to learn more?
(Other definitions for chess that I've seen before include "This is played on board" , "Game with kings and queens" , "Pure-skill board game" , "Board game for two players" , "Board game of 13, 16 and 21" .)