Official NHA Assessment

Race 6: BETWAY SPRING CHALLENGE 4 OCTOBER MR 68 HANDICAP (Open)

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Line Horse
Crepuscolo
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
3 / 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    Michael Faraday      2    57.5    1    0.00     0.0   63    71           63    +0
2    Circle Of Grace      4    53.0    2    2.50     5.0   54    54           54    +0
3    Crepuscolo           4    53.0    3    3.00     5.0   54    54           54    +0
4    Rosy Lemon           5    60.5    4    3.20     0.0   69    79           79    +10
5    Red Sparrow          3    56.0    5    3.30     9.0   62    51           52    -10
5    Trident King         3    61.0    5    3.30     9.0   70    61           61    -9
7    Zoombomber           2    58.5    7    3.70     0.0   65    74           74    +9
8    Blurred Vision       3    57.5    8    3.90     9.0   65    54           55    -10
9    Bob Lee Swagger      4    53.5    9    9.00     5.0   57    53           53    -4
99   Chabal               3    57.0    99   0.00     9.0   -     52           52    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Michael Faraday 63 68 63 +5 0.0 -
2 Circle Of Grace 54 51 54 -3 5.0 -
3 Crepuscolo Line 54 58 54 +4 5.0
4 Rosy Lemon 69 72 79 -7 0.0 -
5 Red Sparrow 62 55 52 +3 9.0 -
5 Trident King 70 65 61 +4 9.0 -
7 Zoombomber 65 60 74 -14 0.0 -
8 Blurred Vision 65 56 55 +1 9.0 -
9 Bob Lee Swagger 57 53 53 ✓ Match 5.0 -
99 Chabal - 73 52 +21 9.0 -
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