History of Sumiko Otsuka
Weight = 0.15
| Date | Boards | Result | Expected |
Performed | Pair | Field | Change | Score | Partner |
| | | | | Strength | Strength | | 50.00 |
| December 9, 1997 |
24 |
43.71 |
50.14 |
43.54 |
50.00 |
49.86 |
-1.58 |
48.42 |
Huiming Cheng (50.00) |
| January 6, 1998 |
21 |
39.48 |
48.98 |
37.91 |
47.58 |
48.59 |
-1.52 |
46.90 |
Nirah Shomer (46.73) |
| April 20, 2004 |
24 |
42.23 |
48.30 |
42.32 |
48.45 |
50.15 |
-1.57 |
45.33 |
Hatsuko Ohtsuka (50.00) |
| April 27, 2004 |
24 |
41.69 |
48.30 |
40.20 |
46.88 |
48.58 |
-1.06 |
44.27 |
Hatsuko Ohtsuka (48.43) |
| August 31, 2004 |
24 |
45.13 |
44.88 |
46.07 |
45.82 |
50.95 |
-0.14 |
44.13 |
Hatsuko Ohtsuka (47.37) |
| Date | Boards | Result | Expected |
Performed | Pair | Field | Change | Score | Partner |
(*) indidates IMP pair games whose results are converted to MP equivalence