Official NHA Assessment

Race 5: www.galloptv.co.za B STAKES (For All Horses with a nett rating of 101 & below)

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Line Horse
Bristol Hercules
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
8 / 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    Uzwano               3    58.5    1    0.00     1.0   90    83           83    -7
2    Go Grayson Go        3    57.0    2    1.40     1.0   91    83           83    -8
3    Bristol Hercules     2    58.5    3    1.90     0.0   88    88           88    +0
4    Terminator           4    54.0    4    5.00     0.5   81    75           75    -6
5    Serpentine Fire      3    54.0    5    6.50     1.0   81    74           74    -7
6    Kaygee's Delight     4    60.0    6    10.40    0.5   91    87           87    -4
7    The Brief            3    58.5    7    19.20    1.0   90    83           83    -7
99   Tobacconist          2    55.5    99   0.00     0.0   -     79           79    +0
99   Jp's Palace          3    58.5    99   0.00     1.0   -     83           83    +0
99   Hat's Pride          2    58.5    99   0.00     0.0   -     85           85    +0
99   Actor                2    55.5    99   0.00     0.0   -     79           79    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Uzwano 90 96 83 +13 1.0 -
2 Go Grayson Go 91 95 83 +12 1.0 -
3 Bristol Hercules Line 88 87 88 -1 0.0
4 Terminator 81 86 75 +11 0.5 -
5 Serpentine Fire 81 80 74 +6 1.0 -
6 Kaygee's Delight 91 89 87 +2 0.5 -
7 The Brief 90 90 83 +7 1.0 -
99 Tobacconist - 81 79 +2 0.0 -
99 Jp's Palace - 93 83 +10 1.0 -
99 Hat's Pride - 97 85 +12 0.0 -
99 Actor - 85 79 +6 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