39. ... 17-21 40. 16x27 22x42 41. 48x37 19-24 42. 32-27 24-30 43. 34x14 23x45 44. 33-29 45-50

39. .. 17-21 was winning for black. In the match 39 .. 22-28 unintended blunder and white wins because of that