White: Player
White: Computer
Black: Player
Black: Computer
White begins
Black begins
9x9 11x11
Hnefatafl means King's table.
It is an ancient game of the Vikings and was known in Scandinavia before 400 A. D. and was carried by the Vikings to Greenland, Iceland, Ireland, Britain, Wales and as far east as the Ukraine.
It was played on odd-sized boards as small as 7 x 7 and as large as 19 x 19. Here are 2 variants implemented: Tablut, the Finnish variant, which was played on a 9x9 board and Hnefatafl, the Norse variant, wich was played either on a 11x11 board or 13x13 board.
Tawlbyund (Tawl Bwrdd = 'Throw Board'), the Welsh variant, was played on an 11x11 board. It dates back at least to the Xth century.
The object for the player with the black pieces (attacker) is to prevent the opponent's king from escaping, and ultimately to capture it. The object for the player with the white pieces (defender) is to escape with the king to one of the corner spaces.
A piece can move horizontally or vertically any number of spaces, like a chess rook. Only the king may land on the throne (the center) or on the corner squares. Either player's pieces may pass over the throne as part of a move. Pieces are captured by flanking opponent's pieces on two opposite sides (custodial capture). Up to three pieces can be captured in a single turn. The corner and throne count as a piece for capturing. Pieces can safely move between two other pieces. The king is captured like nother pieces, except when he is on the throne or in one of the four spaces next to the throne, then he must be surrounded on four sides to be captured, either by four enemy pieces or by three enemy pieces and the throne itself.