Official NHA Assessment

Race 6: JACQUELINE HENDERSON, GRAHAM KENT, GINGER MASTERTON CLASSIFIED STAKES (For horses with nett rating of 75 and below)

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Line Horse
Batik
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
6 / 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    Princess Ilaria      5    56.0    1    0.00     0.0   71    72           72    +1
2    Batik                3    51.5    2    0.80     2.5   62    62           62    +0
3    Maboneng             3    52.0    3    1.00     2.5   56    63           63    +7
4    Fur Baby             2    60.0    4    5.00     0.0   77    80           80    +3
5    Speechmaker          5    54.0    5    5.25     0.0   60    68           68    +8
6    Silver Clock         2    54.0    6    5.50     0.0   65    68           68    +3
7    Twice As Wild        6    50.5    7    7.00     0.0   57    61           61    +4
8    Mix The Magic        3    54.0    8    8.25     2.5   62    63           63    +1
9    Cerulean Dancer      2    56.0    9    10.00    0.0   71    72           72    +1
10   Tiz Magic            2    53.5    10   13.75    0.0   69    67           67    -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Princess Ilaria 71 79 72 +7 0.0 -
2 Batik Line 62 57 62 -5 2.5
3 Maboneng 56 67 63 +4 2.5 -
4 Fur Baby 77 64 80 -16 0.0 -
5 Speechmaker 60 61 68 -7 0.0 -
6 Silver Clock 65 67 68 -1 0.0 -
7 Twice As Wild 57 51 61 -10 0.0 -
8 Mix The Magic 62 52 63 -11 2.5 -
9 Cerulean Dancer 71 71 72 -1 0.0 -
10 Tiz Magic 69 52 67 -15 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