Botvinnik vs Ragozin, 1927  (C16) French, Winawer, 34 moves, 1-0 Botvinnik vs N Pavlov-Pianov, 1927  (C16) French, Winawer, 31 moves, 1-0 Ragozin vs Botvinnik, 1935  (C18) French, Winawer, 39 moves, 0-1 Fine vs Botvinnik, 1938   (C17) French, Winawer, Advance, 31 moves, 1-0 4 games