Official NHA Assessment

Race 2: TOTE SCORE 10 OPEN MAIDEN (F & M) (For all Maiden Fillies & Mares.)

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Line Horse
Di Rosa
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 8
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    K M V Retrofit       3    56.0    1    0.00     2.0   70    61           61    -9
2    Di Rosa              4    56.5    2    1.30     2.5   61    61           61    +0
3    Dancing In Demark    2    59.5    3    4.00     1.0   -     70           70    +70
4    Fantasy League       3    54.0    4    4.60     2.0   58    57           57    -1
5    Dynasty's Last       5    54.5    5    7.20     0.0   50    62           62    +12
6    Gorgeous Bomb        3    57.0    6    7.70     2.0   64    63           63    -1
7    Chicago Lass         6    54.5    7    20.20    0.0   52    62           62    +10
99   Hotaru               2    59.5    99   0.00     1.0   -     70           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 K M V Retrofit 70 69 61 +8 2.0 -
2 Di Rosa Line 61 54 61 -7 2.5
3 Dancing In Demark - 64 70 -6 1.0 -
4 Fantasy League 58 54 57 -3 2.0 -
5 Dynasty's Last 50 61 62 -1 0.0 -
6 Gorgeous Bomb 64 62 63 -1 2.0 -
7 Chicago Lass 52 43 62 -19 0.0 -
99 Hotaru - 91 70 +21 1.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points