Official NHA Assessment

Race 4: GALLOP FORM OPEN MAIDEN (F & M) (For all Maiden Fillies & Mares.)

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Line Horse
Di Rosa
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
7 / 11
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    Queen Of The Spear   2    50.0    1    0.00     7.0   64    59           59    -5
2    Ms Galore            3    55.5    2    1.10     10.5  60    63           63    +3
3    Di Rosa              4    56.0    3    3.30     12.0  61    61           61    +0
4    Chimes At Midnight   3    57.0    4    4.70     10.5  63    66           66    +3
5    Chicago Lass         6    55.0    5    4.75     0.0   52    83           83    +31
6    Red Lhasa            2    60.0    6    5.65     7.0   -     79           79    +79
7    Chericherilady       2    55.0    7    6.25     7.0   73    69           69    -4
8    Sol Nomara           2    54.0    8    10.05    7.0   70    67           67    -3
9    Lyrical Summer       2    60.0    9    15.25    7.0   -     79           79    +79
99   Amber Eyes           3    51.0    99   0.00     10.5  -     54           54    +0
99   Capricious Miss      3    56.5    99   0.00     10.5  -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Queen Of The Spear 64 76 59 +17 7.0 -
2 Ms Galore 60 68 63 +5 10.5 -
3 Di Rosa Line 61 54 61 -7 12.0
4 Chimes At Midnight (ZIM) 63 60 66 -6 10.5 -
5 Chicago Lass 52 43 83 -40 0.0 -
6 Red Lhasa - 63 79 -16 7.0 -
7 Chericherilady 73 67 69 -2 7.0 -
8 Sol Nomara 70 58 67 -9 7.0 -
9 Lyrical Summer - 42 79 -37 7.0 -
99 Amber Eyes - 50 54 -4 10.5 -
99 Capricious Miss - 60 65 -5 10.5 -
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