Official NHA Assessment

Race 2: RIDGEMONT OPEN MAIDEN (For Maidens. R15 000 Win Bonus ROA Members)

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Line Horse
House Of Sussex
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
8 / 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    Silvery Surfer       3    59.5    1    0.00     3.5   68    64           64    -4
2    American Eagle       3    55.5    2    3.25     3.5   60    56           56    -4
3    House Of Sussex      4    57.5    3    3.35     4.0   59    59           59    +0
4    Mr Fox               3    61.0    4    4.10     3.5   71    67           67    -4
5    Fizzly Bubbly        3    58.5    5    5.85     3.5   66    62           62    -4
6    Stand Up             3    52.0    6    7.10     3.5   37    49           49    +12
7    Away With Red        3    48.5    7    7.15     3.5   48    42           42    -6
8    Stormstride          3    55.0    8    8.90     3.5   59    55           55    -4
9    Pardon Me            5    61.0    9    9.40     0.0   -     74           74    +74
10   Whatthebutlersaw     3    61.0    10   11.65    3.5   -     67           67    +67
11   Greedanddesire       4    52.5    11   11.75    4.0   50    49           49    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Silvery Surfer 68 72 64 +8 3.5 -
2 American Eagle 60 59 56 +3 3.5 -
3 House Of Sussex Line 59 50 59 -9 4.0
4 Mr Fox 71 99 67 +32 3.5 -
5 Fizzly Bubbly 66 70 62 +8 3.5 -
6 Stand Up 37 62 49 +13 3.5 -
7 Away With Red 48 62 42 +20 3.5 -
8 Stormstride 59 54 55 -1 3.5 -
9 Pardon Me - 53 74 -21 0.0 -
10 Whatthebutlersaw - 52 67 -15 3.5 -
11 Greedanddesire 50 50 49 +1 4.0 -
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