Official NHA Assessment

Race 4: RACING240 FOR RACING. FOR YOU MR 82 HANDICAP (Open)

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Line Horse
Flying Grace
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
7 / 12
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    Secret Is Ours       4    56.0    1    0.00     1.0   74    74           74    +0
2    Flying Grace         4    57.0    2    0.10     1.0   76    76           76    +0
3    Fifth Of July        5    56.5    3    0.20     0.0   75    77           77    +2
4    Nartjie              4    60.5    4    1.30     1.0   83    86           86    +3
5    Immeasurable         5    56.0    5    1.50     0.0   74    79           79    +5
6    Romeo's Magic        7    53.5    6    2.00     0.0   69    74           74    +5
7    Humble Tune          4    56.0    7    3.50     1.0   74    75           75    +1
8    Western Fort         5    57.0    8    4.50     0.0   79    78           78    -1
9    Tinder Dry           3    54.5    9    5.00     2.5   76    68           68    -8
10   Castle Durrow        4    58.5    10   6.50     1.0   79    79           79    +0
11   Oyster King          5    61.0    11   8.90     0.0   84    86           86    +2
12   Afraad               8    60.0    12   10.65    0.0   82    84           84    +2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Secret Is Ours 74 66 74 -8 1.0 -
2 Flying Grace Line 76 63 76 -13 1.0
3 Fifth Of July 75 63 77 -14 0.0 -
4 Nartjie 83 81 86 -5 1.0 -
5 Immeasurable 74 72 79 -7 0.0 -
6 Romeo's Magic 69 73 74 -1 0.0 -
7 Humble Tune 74 58 75 -17 1.0 -
8 Western Fort 79 76 78 -2 0.0 -
9 Tinder Dry 76 66 68 -2 2.5 -
10 Castle Durrow 79 71 79 -8 1.0 -
11 Oyster King 84 50 86 -36 0.0 -
12 Afraad 82 79 84 -5 0.0 -
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