private boolean playerStartPositionsHasNoLightGrenade(Grid grid) {
		List<LightGrenade> lightGrenades = getLightGrenadesOfGrid(grid);
		
		for (Player p : grid.getAllPlayersOnGrid())
			for (LightGrenade lg : lightGrenades)
				if (grid.getElementPosition(lg).equals(p.getBeginPosition()))
					return false;
		
		return true;
	}