frameok
b2 = r < 0 || frameok(w, r, c);
b3 = frameok(w, r + 1, c);
b2 = r < 0 || frameok(w, r, c);
b3 = frameok(w, r + 1, c);
b2 = c < 0 || frameok(w, r, c);
b3 = frameok(w, r, c + 1);
b2 = c < 0 || frameok(w, r, c);
b3 = frameok(w, r, c + 1);