Official NHA Assessment

Race 4: RACEHORSE OWNERS ASSOCIATION WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Primrose Path
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
10 / 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    Lady Zultanite       3    60.0    1    0.00     3.0   62    55           55    -7
2    Heartlight           2    60.0    2    0.75     2.0   55    57           57    +2
3    Freedom Square       3    60.0    3    1.25     3.0   -     55           55    +55
4    Primrose Path        2    60.0    4    2.50     2.0   57    57           57    +0
5    Chrome Tourmaline    4    57.0    5    2.60     3.5   -     48           48    +48
6    Greenlightranger     3    60.0    6    3.60     3.0   67    55           57    -10
7    Shivas Spirit        3    60.0    7    5.75     3.0   -     55           55    +55
8    Have A Party         3    60.0    8    5.80     3.0   -     55           55    +55
9    All Rise             3    60.0    9    15.00    3.0   -     55           55    +55
10   Linda's Legacy       3    60.0    10   16.50    3.0   -     55           55    +55
11   Gracious Rock        3    60.0    11   30.00    3.0   -     55           55    +55
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Lady Zultanite 62 66 55 +11 3.0 -
2 Heartlight 55 48 57 -9 2.0 -
3 Freedom Square - 63 55 +8 3.0 -
4 Primrose Path Line 57 77 57 +20 2.0
5 Chrome Tourmaline - 107 48 +59 3.5 -
6 Greenlightranger 67 63 57 +6 3.0 -
7 Shivas Spirit - 36 55 -19 3.0 -
8 Have A Party - 64 55 +9 3.0 -
9 All Rise - 50 55 -5 3.0 -
10 Linda's Legacy - 25 55 -30 3.0 -
11 Gracious Rock - 10 55 -45 3.0 -
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