Official NHA Assessment

Race 3: MIDDLE STAKES (For horses with nett rating of 92 and below)

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Line Horse
Varnica
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
0 / 5
Within 2 points
Significant Diffs
4 / 5
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    Oden                 6    51.5    1    0.00     0.0   75    76           76    +1
2    Emerald Floe         4    53.5    2    3.00     3.5   81    73           73    -8
3    Varnica              5    53.5    3    4.75     0.0   80    80           80    +0
4    In Good Time         5    52.0    4    7.25     0.0   74    77           77    +3
5    Armstrong            6    56.0    5    9.25     0.0   90    85           85    -5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Oden 75 88 76 +12 0.0 -
2 Emerald Floe 81 82 73 +9 3.5 -
3 Varnica Line 80 90 80 +10 0.0
4 In Good Time 74 71 77 -6 0.0 -
5 Armstrong 90 89 85 +4 0.0 -
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