History of Hatsuko Ohtsuka
Weight = 0.02
| Date | Boards | Result | Expected |
Performed | Pair | Field | Change | Score | Partner |
| | | | | Strength | Strength | | 50.00 |
| April 20, 2004 |
24 |
42.23 |
48.30 |
42.32 |
48.45 |
50.15 |
-1.57 |
48.43 |
Sumiko Otsuka (46.90) |
| April 27, 2004 |
24 |
41.69 |
48.30 |
40.20 |
46.88 |
48.58 |
-1.06 |
47.37 |
Sumiko Otsuka (45.33) |
| August 31, 2004 |
24 |
45.13 |
44.88 |
46.07 |
45.82 |
50.95 |
-0.14 |
47.23 |
Sumiko Otsuka (44.27) |
| Date | Boards | Result | Expected |
Performed | Pair | Field | Change | Score | Partner |
(*) indidates IMP pair games whose results are converted to MP equivalence