After the celebratory feast that took place the day before, a 35-year-old man was hospitalized with complaints of marked pain within the I metatarsophalangeal articulation on the right, which developed late in the night, and impaired walking. Objectively: the metatarsophalangeal articulation is swollen, hyperemic, hot to touch, painful on movement. In blood: erythrocytes -5,1 × 1012 /l, Hb-155 g/l, leukocytes-13,0 × 109/l, ESR - 50 mm/hour, CRP- 46 mg/dl, uric acid - 720 mcmol/l. X-ray of feet articulations: osteoporosis, narrowing of interarticular spaces, numerous punched-out erosions. Make the preliminary diagnosis: