Grandmaster Colin McNab in Lewis Chessmen challenge

More than 90 pieces were found in a sand dune on Lewis

Chess grandmaster Dr Colin McNab is challenging players on the Western Isles to take him on in a tournament celebrating the Lewis Chessmen.

Thirty of the 12th Century chess pieces found on Lewis in 1831 are on public display on the island.

In total 90 pieces were discovered beneath a sand dune near Uig.

Scottish champion chess player Dr McNab is to play against enthusiasts at An Lanntair art gallery in Stornoway on Saturday.

The tournament has received funding for the Scotland's Islands - a year-long celebration of island life - and European Regional Development Fund.