Official NHA Assessment

Race 2: STUART FERRIE RACING MAIDEN PLATE (For all Maidens)

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Line Horse
Red Mountain
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
11 / 13
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 Mountain         4    56.0    1    0.00     5.0   73    73           73    +0
2    Chief Runner         3    57.0    2    3.60     8.0   -     70           70    +70
3    Vencedor             2    55.5    3    3.70     0.0   69    83           83    +14
4    Lukhayf              2    57.0    4    3.90     0.0   -     86           86    +86
5    Actor                2    57.0    5    4.50     0.0   -     85           85    +85
6    Claude Monet         2    57.0    6    5.00     0.0   -     85           85    +85
7    Artist's Model       3    57.0    7    5.20     8.0   -     69           69    +69
8    Shiny Bob            4    60.0    8    5.90     5.0   -     81           81    +81
9    Kola Tonic           2    57.0    9    6.30     0.0   87    85           85    -2
10   Isorender            2    60.0    10   6.60     0.0   65    91           91    +26
11   Amor Fati            2    57.0    11   10.20    0.0   80    85           85    +5
12   Star Man             3    57.0    12   16.00    8.0   -     69           69    +69
99   Whereverilaymyhat    4    60.0    99   0.00     5.0   -     81           81    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Red Mountain Line 73 77 73 +4 5.0
2 Chief Runner - 59 70 -11 8.0 -
3 Vencedor 69 67 83 -16 0.0 -
4 Lukhayf - 68 86 -18 0.0 -
5 Actor - 85 85 ✓ Match 0.0 -
6 Claude Monet - 56 85 -29 0.0 -
7 Artist's Model - 96 69 +27 8.0 -
8 Shiny Bob - 60 81 -21 5.0 -
9 Kola Tonic 87 78 85 -7 0.0 -
10 Isorender 65 63 91 -28 0.0 -
11 Amor Fati 80 92 85 +7 0.0 -
12 Star Man - 63 69 -6 8.0 -
99 Whereverilaymyhat - 68 81 -13 5.0 -
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