Official NHA Assessment

Race 4: MERIT RATED 71 HANDICAP (Open)

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Line Horse
Assume
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
5 / 9
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    Al Mashriq           4    55.5    1    0.00     2.0   61    60           61    +0
2    Keen Spirit          3    56.5    2    2.50     1.5   65    63           63    -2
3    Assume               3    54.0    3    3.75     1.5   58    58           58    +0
4    Powder Puff          4    59.0    4    3.85     2.0   69    67           67    -2
5    Var Aglow            5    60.0    5    9.85     0.0   71    73           73    +2
6    Cha Vez              3    52.5    6    9.90     1.5   57    55           55    -2
7    Justadoreher         5    58.5    7    9.95     0.0   68    70           70    +2
8    Albar Warning        3    52.0    8    11.20    1.5   51    54           54    +3
9    Ian's Ferrari        3    55.0    9    19.20    1.5   62    60           60    -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Al Mashriq 61 71 61 +10 2.0 -
2 Keen Spirit 65 71 63 +8 1.5 -
3 Assume Line 58 58 58 ✓ Match 1.5
4 Powder Puff 69 58 67 -9 2.0 -
5 Var Aglow 71 84 73 +11 0.0 -
6 Cha Vez 57 55 55 ✓ Match 1.5 -
7 Justadoreher 68 68 70 -2 0.0 -
8 Albar Warning 51 48 54 -6 1.5 -
9 Ian's Ferrari 62 63 60 +3 1.5 -
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