Maximum max position is 8, but with 3 non-adjacent in 5 positions, the last can be at most 5 if first at 1,3,5 — or 1,3,6 or 1,3,7,8—but 8 ≥ 6, so 1,3,6 or 1,3,7, or 1,3,8, or 1,4,6, etc. - Nelissen Grade advocaten