True-redshift distribution of the simulated Flagship2 ten tomographic bins with z_p < 1.6 (solid lines) and their clustering-redshifts measurements with our pipeline, including all systematics and realistic bias correction M3. The first two bin measurements are realised with 2500 deg² sky patches, and the other eight are realised with 1000 deg² sky patches. The dark and light error bars indicate 68.3% and 95.5% uncertainties, but are barely visible by eye.