Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Iron Sky
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
2 / 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    Civil Princess (ARG  3    57.5    1    0.00     5.0   -     68           6     +6
2    Rockingthetimeaway   3    55.0    2    3.00     5.0   61    63           63    +2
3    Iron Sky             3    60.0    3    4.75     5.0   73    73           73    +0
4    Brosnan              2    60.0    4    5.00     3.5   -     76           76    +76
5    Dungeons             2    60.0    5    6.25     3.5   71    76           76    +5
6    Fulliautomatix       3    60.0    6    6.50     5.0   58    73           73    +15
7    Tony Soprano         2    60.0    7    7.25     3.5   45    76           76    +31
8    Secret Reef          3    60.0    8    9.50     5.0   -     73           73    +73
9    Var Park             5    60.0    9    12.50    0.0   76    83           83    +7
10   African Twilight     3    60.0    10   16.00    5.0   -     73           73    +73
11   Stalker              3    60.0    11   18.50    5.0   47    73           73    +26
99   Hearts Thunder       4    60.0    99   0.00     6.0   -     71           71    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Civil Princess (ARG) - 72 6 +66 5.0 -
2 Rockingthetimeaway 61 62 63 -1 5.0 -
3 Iron Sky Line 73 61 73 -12 5.0
4 Brosnan - 75 76 -1 3.5 -
5 Dungeons 71 73 76 -3 3.5 -
6 Fulliautomatix 58 66 73 -7 5.0 -
7 Tony Soprano 45 40 76 -36 3.5 -
8 Secret Reef - 50 73 -23 5.0 -
9 Var Park 76 87 83 +4 0.0 -
10 African Twilight - 52 73 -21 5.0 -
11 Stalker 47 41 73 -32 5.0 -
99 Hearts Thunder - 66 71 -5 6.0 -
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