@bunyip and
@akul_nagori Yes, whilst there are as many opinions about the origins of chess as there are people to express them there is little if any evidence to support any earlier date that 8th c.
The so called Lewis chessmen are almost certainly from an old Nordic board game called Tafl or henefatatl.
There are several reasons to doubt that they were intended for chess. These are some:-
The original horde was said at the time to have been found in a small stone hut on the Isle of Lewis. Whilst that may be so, unfortunately they passed through the hands of a crooked dealer in Edinburgh (Scotland) who messed with them to make them look more like chess pieces so that he could extort a good price for them from the British museum. (he at least. stained half of them red)
There were far to few pawns in the original group for chess (only 6 or so out of 93 objects (from memory)) .
There is no figure to stand in for the rook which is known to already have been a 'castle' (see the holdings of a similarly old set in the Musee Cluny in Paris (France).
They are a much better fit for Tafl
I could go on but I think that will do for now. I have read most of the published literature on these objects.