Official NHA Assessment

Race 1: BETWAY WELCOMES YOU WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Cat O'clock
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 7
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    Last Car To Pass     3    57.0    1    0.00     8.0   -     63           6     +6
2    Cat O'clock          3    60.0    2    2.50     8.0   71    71           71    +0
3    On A Jet Plane       3    57.5    3    4.00     8.0   -     65           65    +65
4    Paris Party          3    57.0    4    12.00    8.0   -     63           63    +63
5    Black Hole Sun       4    60.0    5    19.00    5.0   63    75           75    +12
6    Plum Blossom         3    60.0    6    20.00    8.0   63    69           69    +6
7    Pearly Ash           2    57.0    7    25.50    0.0   -     79           79    +79
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Last Car To Pass - 86 6 +80 8.0 -
2 Cat O'clock Line 71 71 71 ✓ Match 8.0
3 On A Jet Plane - 71 65 +6 8.0 -
4 Paris Party - 56 63 -7 8.0 -
5 Black Hole Sun 63 53 75 -22 5.0 -
6 Plum Blossom 63 53 69 -16 8.0 -
7 Pearly Ash - 51 79 -28 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