Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION WORK RIDERS MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

Back to Race
Line Horse
Callaburn
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
9 / 11
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Al Akhtaar           3    60.0    1    0.00     3.5   69    65           65    -4
2    Callaburn            2    60.0    2    5.00     0.0   72    72           72    +0
3    In A Blue Moon       2    60.0    3    5.75     0.0   75    72           72    -3
4    Japanese Maple       4    60.0    4    8.50     1.5   60    69           69    +9
5    Touched By Stars     5    60.0    5    9.75     0.0   57    72           72    +15
6    Agamemnon            3    60.0    6    10.00    3.5   63    65           65    +2
7    Pomo Clapper         2    60.0    7    11.75    0.0   75    72           72    -3
8    Kanimambo            5    60.0    8    11.80    0.0   56    72           72    +16
9    Silver Seven         3    60.0    9    99.99    3.5   -     65           65    +65
99   Master Tik Tok       5    60.0    99   0.00     0.0   -     72           72    +0
99   Russian Lotus        3    60.0    99   0.00     3.5   -     65           65    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Al Akhtaar 69 72 65 +7 3.5 -
2 Callaburn Line 72 52 72 -20 0.0
3 In A Blue Moon 75 74 72 +2 0.0 -
4 Japanese Maple 60 56 69 -13 1.5 -
5 Touched By Stars 57 52 72 -20 0.0 -
6 Agamemnon 63 58 65 -7 3.5 -
7 Pomo Clapper 75 68 72 -4 0.0 -
8 Kanimambo 56 59 72 -13 0.0 -
9 Silver Seven - 38 65 -27 3.5 -
99 Master Tik Tok - 80 72 +8 0.0 -
99 Russian Lotus - 59 65 -6 3.5 -
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