Official NHA Assessment

Race 6: WWW.HIGHVELDRACING.CO.ZA MR 90 HANDICAP (Open)

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Line Horse
Imperial Master
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 8
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    Run As One           3    53.0    1    0.00     6.0   88    69           88    +0
2    Imperial Master      4    56.0    2    0.50     3.0   88    88           88    +0
3    Oyster King          5    58.0    3    0.55     0.0   86    98           98    +12
4    Category Four        6    56.0    4    0.90     0.0   82    93           93    +11
5    Romeo's Magic        7    55.5    5    2.25     0.0   82    91           91    +9
6    Have A Go Jo         4    55.5    6    3.00     3.0   82    83           83    +1
7    Captain Chorus       5    60.0    7    5.50     0.0   90    95           95    +5
99   Apollo Robbins       5    55.0    99   0.00     0.0   -     85           85    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Run As One 88 79 88 -9 6.0 -
2 Imperial Master Line 88 90 88 +2 3.0
3 Oyster King 86 50 98 -48 0.0 -
4 Category Four 82 77 93 -16 0.0 -
5 Romeo's Magic 82 73 91 -18 0.0 -
6 Have A Go Jo 82 70 83 -13 3.0 -
7 Captain Chorus 90 67 95 -28 0.0 -
99 Apollo Robbins - 69 85 -16 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