Official NHA Assessment

Race 7: CAPE RACING SALES CLASS 4 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 78)

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Line Horse
Perilla
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 10
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    Red Sash             5    57.5    1    0.00     0.0   79    76           76    -3
2    Busy Lizzie          2    57.0    2    0.30     0.0   78    80           80    +2
3    Gimmeafirst          2    58.5    3    1.05     0.0   81    82           82    +1
4    Perilla              5    56.0    4    1.80     0.0   76    76           76    +0
5    Defining Moment      2    53.5    5    2.55     0.0   71    70           70    -1
6    Double Check         3    60.0    6    2.65     3.0   78    77           77    -1
7    Perfect Trust        7    57.5    7    3.65     0.0   73    77           77    +4
8    Metar                3    58.5    8    4.05     3.0   75    73           73    -2
9    Zippy Over           3    59.5    9    4.10     3.0   77    75           75    -2
10   Black Path           6    52.5    10   7.35     0.0   55    66           66    +11
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Red Sash 79 101 76 +25 0.0 -
2 Busy Lizzie 78 66 80 -14 0.0 -
3 Gimmeafirst 81 79 82 -3 0.0 -
4 Perilla Line 76 89 76 +13 0.0
5 Defining Moment 71 64 70 -6 0.0 -
6 Double Check 78 85 77 +8 3.0 -
7 Perfect Trust 73 50 77 -27 0.0 -
8 Metar 75 73 73 ✓ Match 3.0 -
9 Zippy Over 77 78 75 +3 3.0 -
10 Black Path 55 58 66 -8 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