| New York 1926 (6)     | 
Manhattan Club Championship     | 
   9  |  /  |  14  | 
   |  |  |  | 
  | New York 1927 (3)     | 
Manhattan Club Championship     | 
   9  |  /  |  14  | 
   |  |  |  | 
  | New York 1928 (2)     | 
Manhattan Club Championship     | 
   4.5  |  /  |  8  | 
   |  |  |  | 
  | Bradley Beach 1928     | 
Bradley Beach Tournament     | 
   4.5  |  /  |  7  | 
   |  |  |  | 
  | New York 1928 (6)     | 
Manhattan Junior Masters Tournament     | 
   3.5  |  /  |  6  | 
   |  |  |  | 
  | New York 1929 (3)     | 
Manhattan Club - City College Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Kussman, A.S.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1929 (4)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Perkins, F.K.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1930 (5)     | 
Manhattan Club - Hungarian Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Berman, E.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1930 (7)     | 
Manhattan Club - Columbia University Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Halper, N.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1930 (8)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Cass, A.C.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1930 (9)     | 
Manhattan Club Championship     | 
   6  |  /  |  10  | 
   |  |  |  | 
  | New York 1931 (2)     | 
Philadelphia - Manhattan Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Sharp, S.T.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1931 (7)     | 
Marshall Club - Manhattan Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Dake, A.W.     | 
  0 - 1     | 
   |  |  |  | 
  | New York 1931 (8)     | 
Manhattan Club - Empire City Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Simchow, A.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1931 (10)     | 
New York International Tournament     | 
   5.5  |  /  |  11  | 
   |  |  |  | 
  | Prague 1931 (5)     | 
4th Olympiad     | 
   9  |  /  |  13  | 
   |  |  |  | 
  | New York 1932 (10)     | 
Manhattan Club - Hungarian International Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Peckover, J.E.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1932 (11)     | 
Marshall Club - Manhattan Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Reinfeld, F.     | 
  0 - 1     | 
   |  |  |  | 
  | New York 1932 (13)     | 
Manhattan Club - Mercantile Library Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Levin, J.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1933 (2)     | 
Manhattan Club Championship     | 
   6.5  |  /  |  10  | 
   |  |  |  | 
  | New York 1933 (11)     | 
Manhattan Club - Empire City Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Simchow, A.     | 
  0 - 1     | 
   |  |  |  | 
  | Philadelphia 1933     | 
Manhattan Club - Philadelphia Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Winkelman, B.F.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1933 (13)     | 
Marshall Club - Manhattan Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Santasiere, A.E.     | 
  0 - 1     | 
   |  |  |  | 
  | New York 1933 (14)     | 
U.S. Olympic Team Trial Tournament     | 
   5.5  |  /  |  10  | 
   |  |  |  | 
  | Syracuse 1934 (1)     | 
Syracuse International Tournament     | 
   8.5  |  /  |  14  | 
   |  |  |  | 
  | New York 1934 (1)     | 
Manhattan Club Championship     | 
   9.5  |  /  |  13  | 
   |  |  |  | 
  | New York 1934 (3)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Reinfeld, F.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1935 (1)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Reshevsky, S.H.     | 
  0 - 1     | 
   |  |  |  | 
  | Philadelphia 1935     | 
Manhattan Club - Mercantile Library Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Glover, E.R.     | 
  1 - 0     | 
   |  |  |  | 
  | Warsaw 1935 (2)     | 
6th Olympiad     | 
   12  |  /  |  15  | 
   |  |  |  | 
  | New York 1936 (4)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Dake, A.W.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1936 (5)     | 
Manhattan Club - Progressive Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Treysman, G.N.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1936 (6)     | 
Manhattan Club - International Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Soudakoff, J.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1936 (12)     | 
U.S. Championship - Final     | 
   7  |  /  |  15  | 
   |  |  |  | 
  | Philadelphia 1936 (4)     | 
37th American Chess Federation Congress - Preliminary 4     | 
   10  |  /  |  12  | 
   |  |  |  | 
  | Philadelphia 1936 (5)     | 
37th American Chess Federation Congress - Championship     | 
   8  |  /  |  11  | 
   |  |  |  | 
  | New York 1937 (2)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Hanauer, M.L.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | New York 1937 (3)     | 
Philadelphia - Manhattan Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Regen, A.     | 
  1 - 0     | 
   |  |  |  | 
  | Stockholm 1937 (3)     | 
7th Olympiad     | 
   13  |  /  |  15  | 
   |  |  |  | 
  | New York 1938 (2)     | 
Manhattann Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Reshevsky, S.H.     | 
  0 - 1     | 
   |  |  |  | 
  | New York 1938 (3)     | 
2nd USA Championship - Final     | 
   10  |  /  |  16  | 
   |  |  |  | 
  | New York 1938 (8)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Fine, R.     | 
  0 - 1     | 
   |  |  |  | 
  | Boston, Massachusetts 1938 (2)     | 
39th American Chess Federation Congress - Preliminary Section 2     | 
   5.5  |  /  |  6  | 
   |  |  |  | 
  | Boston, Massachusetts 1938 (7)     | 
39th American Chess Federation Congress - Championship Final     | 
   9  |  /  |  11  | 
   |  |  |  | 
  | New York 1939 (1)     | 
Manhattan Club - Rice Progressive Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Lazinsky     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1939 (3)     | 
Manhattan Club - Marshall Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Hanauer, M.L.     | 
  0.5 - 0.5     | 
   |  |  |  | 
  | Philadelphia 1939     | 
Manhattan Club - Philadelphia Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Morris, H.R.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1939 (6)     | 
40th American Chess Federation Congress - Preliminary Section 3     | 
   4.5  |  /  |  6  | 
   |  |  |  | 
  | New York 1939 (8)     | 
40th American Chess Federation Congress - Final     | 
   8  |  /  |  11  | 
   |  |  |  | 
  | New York 1939 (12)     | 
Manhattan Club - Westside YMCA Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Neckermann, M.F.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1939 (14)     | 
Manhattan Club - New Jersey League Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - McCormick, E.T.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1942 (3)     | 
Marshall Club - Manhattan Club Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Seidman, H.     | 
  1 - 0     | 
   |  |  |  | 
  | New York 1942 (4)     | 
4th USA Chammpionship - Final     | 
   8  |  /  |  14  | 
   |  |  |  | 
  | Cazenovia 1942     | 
New York State Chess Association Championship     | 
   8  |  /  |  9  | 
   |  |  |  | 
  | Dallas 1942     | 
43rd USA Open Championship     | 
   15.5  |  /  |  17  | 
   |  |  |  | 
  | Syracuse 1943     | 
New York State Chess Association Championship     | 
   14  |  /  |  15  | 
   |  |  |  | 
  | New York 1944 (2)     | 
U.S.A. Championship - Final     | 
   14  |  /  |  17  | 
   |  |  |  | 
  | Hollywood 1945     | 
Pan American Tournament     | 
   8  |  /  |  12  | 
   |  |  |  | 
  | Moscow and New York 1945     | 
USSR - USA Radio Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Flohr, S.M.     | 
  1 - 1     | 
   |  |  |  | 
  | Moscow 1946 (3)     | 
U.S.S.R. - U.S.A. Match     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Boleslavsky, I.E.     | 
  1 - 1     | 
   |  |  |  | 
  | New York 1946 (4)     | 
6th U.S.A. Championship     | 
   12  |  /  |  18  | 
   |  |  |  | 
  | La Plata and New York 1947     | 
La Plata - New York Radiomatch     | 
   |  |  |    |  |  |  | 
   | 
    Horowitz, I.A. - Pilnik, H.     | 
  0.5 - 0.5     | 
   |  |  |  |