Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
City Lights
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 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    Devilishlygorgeous   4    60.0    1    0.00     2.0   65    59           59    -6
2    City Lights          4    60.0    2    4.75     2.0   59    59           59    +0
3    Bella Boop Boop      3    60.0    3    7.05     4.5   64    54           54    -10
4    Battle Of Britain    3    60.0    4    9.55     4.5   -     54           54    +54
5    Jinger Jam           3    60.0    5    9.80     4.5   -     54           54    +54
6    Lacewing             3    58.5    6    10.60    4.5   74    51           64    -10
7    Sasha Lee            3    60.0    7    11.10    4.5   -     54           54    +54
8    Intro                3    60.0    8    12.50    4.5   72    54           62    -10
9    Up The Ante          3    60.0    9    14.50    4.5   75    54           65    -10
99   Lava Lamp            3    60.0    99   0.00     4.5   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Devilishlygorgeous 65 64 59 +5 2.0 -
2 City Lights Line 59 52 59 -7 2.0
3 Bella Boop Boop 64 58 54 +4 4.5 -
4 Battle Of Britain - 59 54 +5 4.5 -
5 Jinger Jam - 63 54 +9 4.5 -
6 Lacewing 74 71 64 +7 4.5 -
7 Sasha Lee - 61 54 +7 4.5 -
8 Intro 72 66 62 +4 4.5 -
9 Up The Ante 75 75 65 +10 4.5 -
99 Lava Lamp - 84 54 +30 4.5 -
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