The Fortac board is a 4×4 grid. Victory is achieved by being the first to make 2 different Combos. A Combo is made by placing your 4 pieces into one of 4 arrangements:
Occupy all 4 corner spaces of the board (Corner Combo)
Occupy 4 spaces in a row diagonally (Diagonal Combo)
Occupy 4 spaces in a row orthogonally (Orthogonal Combo)
Occupy the 4 center spaces of the board. (Center Combo)
You must verbally declare a Combo on the turn you form it. After your first combo play continues from the same positions & with the same hands. Your second combo must be of a different type from the first.