Official NHA Assessment

Race 3: DERBY DAY FUN 1 APRIL MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Call To Glory (GB)
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
9 / 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    Avoontoast           5    60.0    1    0.00     0.0   -     -            -     +0
2    Call To Glory (GB)   5    60.0    2    5.50     0.0   -     -            -     +0
3    United's Ransom      3    60.0    3    13.50    2.5   40    -5           30    -10
4    Misava               3    60.0    4    14.00    2.5   62    -5           52    -10
5    Keep The Fort        3    60.0    5    14.75    2.5   74    -5           64    -10
6    Queen's Gambit       3    57.5    6    21.00    2.5   -     -10          -     +0
7    Have A Party         3    60.0    7    33.00    2.5   -     -5           -     +0
8    Honey In Green       3    60.0    8    34.00    2.5   -     -5           -     +0
9    Levitator            5    60.0    9    39.00    0.0   -     -            -     +0
10   Countess Danza       5    60.0    10   99.99    0.0   73    -            64    -9
11   Apache Sunrise       3    60.0    11   99.99    2.5   -     -5           -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Avoontoast - 86 - +86 0.0 -
2 Call To Glory (GB) Line - 84 - +84 0.0
3 United's Ransom 40 59 30 +29 2.5 -
4 Misava 62 53 52 +1 2.5 -
5 Keep The Fort 74 66 64 +2 2.5 -
6 Queen's Gambit - 46 - +46 2.5 -
7 Have A Party - 64 - +64 2.5 -
8 Honey In Green - 20 - +20 2.5 -
9 Levitator - 60 - +60 0.0 -
10 Countess Danza 73 51 64 -13 0.0 -
11 Apache Sunrise - 10 - +10 2.5 -
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