Official NHA Assessment

Race 4: WWW.TAB4RACING.COM MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Arctic Vixen
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
5 / 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    Springer             2    60.0    1    0.00     0.0   76    66           66    -10
2    Perform              2    58.5    2    0.25     0.0   55    63           63    +8
3    Arctic Vixen         2    60.0    3    1.25     0.0   70    70           70    +0
4    Angel Of My Heart    3    60.0    4    2.50     4.5   63    59           59    -4
5    Blue Quartz          4    60.0    5    2.55     2.0   68    64           64    -4
6    Sensual Kiss         3    60.0    6    7.05     4.5   -     57           57    +57
7    Slanj A Va           3    56.0    7    7.55     4.5   -     49           49    +49
8    Exquisite Dawn       2    58.5    8    8.05     0.0   63    63           63    +0
9    Bacardi Babe         3    60.0    9    8.55     4.5   54    57           57    +3
99   Atchison Topeka      3    60.0    99   0.00     4.5   -     57           57    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Springer 76 75 66 +9 0.0 -
2 Perform 55 54 63 -9 0.0 -
3 Arctic Vixen Line 70 66 70 -4 0.0
4 Angel Of My Heart 63 51 59 -8 4.5 -
5 Blue Quartz 68 62 64 -2 2.0 -
6 Sensual Kiss - - 57 -57 4.5 -
7 Slanj A Va - 50 49 +1 4.5 -
8 Exquisite Dawn 63 58 63 -5 0.0 -
9 Bacardi Babe 54 56 57 -1 4.5 -
99 Atchison Topeka - 51 57 -6 4.5 -
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