Official NHA Assessment

Race 1: SUNRISE IRON AND STEEL MAIDEN PLATE (For all Maidens)

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Line Horse
Cotton Ron
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
7 / 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    Cotton Ron           6    60.0    1    0.00     0.0   63    63           63    +0
2    El Draque            5    60.0    2    0.40     0.0   71    63           63    -8
3    Imperial Power       4    58.0    3    0.50     11.0  82    37           72    -10
4    Vibe Sa              2    58.0    4    2.20     6.5   86    46           76    -10
5    Give Us A Smile      2    58.0    5    3.10     6.5   81    46           71    -10
6    Red Mountain         4    58.0    6    3.90     11.0  -     37           37    +37
7    Lucky Murphy         3    58.0    7    6.50     9.5   -     40           40    +40
8    Sir Ector            3    58.0    8    8.90     9.5   -     40           40    +40
9    Chilli Chacha        2    58.0    9    11.80    6.5   68    46           58    -10
99   Nikolai Kopernik     2    56.5    99   0.00     6.5   -     43           43    +0
99   Yannakis             2    58.0    99   0.00     6.5   -     46           46    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cotton Ron Line 63 59 63 -4 0.0
2 El Draque 71 57 63 -6 0.0 -
3 Imperial Power 82 89 72 +17 11.0 -
4 Vibe Sa 86 92 76 +16 6.5 -
5 Give Us A Smile 81 67 71 -4 6.5 -
6 Red Mountain - 77 37 +40 11.0 -
7 Lucky Murphy - 57 40 +17 9.5 -
8 Sir Ector - - 40 -40 9.5 -
9 Chilli Chacha 68 55 58 -3 6.5 -
99 Nikolai Kopernik - 45 43 +2 6.5 -
99 Yannakis - 67 46 +21 6.5 -
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