Official NHA Assessment

Race 3: TAB 4RACING APP OPEN MAIDEN (For all Maidens.)

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Line Horse
Grand Allegro
Reference for assessment
Exact Matches
1 / 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    Winter Emeralds      2    55.0    1    0.00     2.0   63    65           65    +2
2    Grand Allegro        3    61.0    2    2.50     3.0   75    75           75    +0
3    Master Wizard        3    50.0    3    2.60     3.0   60    53           53    -7
4    American Pitbull     5    56.5    4    4.40     0.0   62    72           72    +10
5    Dynamite Jet         6    53.0    5    5.90     0.0   49    65           65    +16
6    Letona               3    54.0    6    9.40     3.0   60    61           61    +1
7    Stormstride          3    52.0    7    10.15    3.0   56    57           57    +1
8    Stand Up             3    49.5    8    20.40    3.0   45    52           52    +7
99   Mitredat             3    52.5    99   4.35     3.0   51    58           51    +0
99   Brooksider           3    58.0    99   0.00     3.0   -     69           69    +0
99   Smart View           4    53.0    99   0.00     3.5   -     58           58    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Winter Emeralds 63 82 65 +17 2.0 -
2 Grand Allegro Line 75 62 75 -13 3.0
3 Master Wizard 60 58 53 +5 3.0 -
4 American Pitbull 62 62 72 -10 0.0 -
5 Dynamite Jet 49 43 65 -22 0.0 -
6 Letona 60 57 61 -4 3.0 -
7 Stormstride 56 54 57 -3 3.0 -
8 Stand Up 45 62 52 +10 3.0 -
99 Mitredat 51 51 51 ✓ Match 3.0 -
99 Brooksider - 55 69 -14 3.0 -
99 Smart View - 46 58 -12 3.5 -
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