 Some boards feature only a central horizontal line crossing the connected vertical lines, but the game is still played as if there were three rows of short lines.A special type of sáhkku board is the so-called Návuotna board which has three rows of squares ("ruvttat", "lanjat") instead of lines.The central line/square of the middle row, sometimes referred to as "the Castle", is indicated by a "sáhkku"-symbol ("X"), sun symbol, or other ornament.