Behavior of the flare in microwaves and other emissions is analyzed. Our study is based, for the first time, on Siberian Solar Radio Telescope imaging data along with other multi-spectral data. The development of the flare shows in height the magnetic structures that were successively involved. The flare was very complex. It consisted of several distinct phases and exhibited many interesting properties. The relationship between microwave sources and soft X-ray structures shows that the responsibility for the flare involves interaction of large-scale loops, whose orientation is strongly different from the potential one. Closer accordance of the potential magnetic field lines and fine structures observed in UV was achieved in the post-flare stage. The development of the flare looks like a `reversed movie' of the preceding evolution of the photospheric magnetic configuration.