Tafl: Spread
Unambiguous finds of pieces from the eighth century show that the game was being played by the time the Vikings made their first raids abroad. So, while this ninth-century board, a fragment of which was found in Gokstad in Norway, doesn't have any markings that identify it beyond doubt as tafl, we do know it has the right size and shape (a nine mens morris board on the reverse confirms it is square), and a 13x13 board tallies with no other game of this era.
But this board found in Ballinderry in Ireland in 1932 is unmistakeably tafl. The giveaway feature, along with the odd number of cells on the square board, is the marked central cell. The board was made in Dublin in around the tenth century. An onion-shaped piece found in Dublin gives some idea of what the pieces would have looked like.
Decline