Evolution of flare configuration. The background is the TRACE images in the 171 Å line at the different flare stages. Top row: white and black contours show the 5.7 GHz brightness temperatures in intensity and right polarization, respectively (a and b). Magenta and cyan contours present the 17 GHz and 34 GHz sources in intensity, respectively. The cross in the left upper corner show the SSRT beam widths (a). c) Part of the panel in Fig. 2, bounded by a white square. In the bottom row with extended frames, the color contours show the isolines of the hard X-ray emission at levels (0.5, 0.9): 3–6 keV (black), 6–12 keV (pink), 12–25 keV (green), and 25–50 keV (blue). Arrows mark ropes A and B. The axes show the arcsec from the solar disk center.