function minimax(node, depth)    if node is a terminal node or depth = CutoffDepth        return the heuristic value of node    if the adversary is to play at node        let beta := +infinite        foreach child of node            beta := min(beta, minimax(child, depth+1))       return beta    else {we are to play at node}        let a := -infinite        foreach child of node            a := max(a, minimax(child, depth+1))       return a