Official NHA Assessment

Race 2: CELEBRATING CENTURION MEMBER GAYNOR RUPERT'S BIRTHDAY MAIDEN PLATE (For all Maidens)

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Line Horse
Rafa Bay
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
0 / 13
Within 2 points
Significant Diffs
10 / 13
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    Diablo               2    60.0    1    0.00     0.0   80    80           80    +0
2    Real Stunner         3    60.0    2    0.05     7.0   -     66           66    +66
3    Thomas Jenkins       3    60.0    3    2.30     7.0   -     68           68    +68
4    Rafa Bay             2    60.0    4    2.60     0.0   82    82           82    +0
5    Master Bomber        3    60.0    5    3.00     7.0   -     68           68    +68
6    Grand Allegro        3    60.0    6    5.25     7.0   82    66           72    -10
7    Count William        3    60.0    7    5.75     7.0   -     66           66    +66
8    Heemstede            3    60.0    8    6.15     7.0   -     66           66    +66
9    Amandla Ngawethu     3    60.0    9    6.45     7.0   -     66           66    +66
10   District Master      3    60.0    10   7.20     7.0   -     66           66    +66
11   Tripping Thunder     3    60.0    11   8.95     7.0   -     66           66    +66
12   Greenlight Jet       3    60.0    12   11.20    7.0   -     66           66    +66
13   World Soprano        2    60.0    13   13.20    0.0   64    80           80    +16
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Diablo 80 76 80 -4 0.0 -
2 Real Stunner - 74 66 +8 7.0 -
3 Thomas Jenkins - 76 68 +8 7.0 -
4 Rafa Bay Line 82 96 82 +14 0.0
5 Master Bomber - 71 68 +3 7.0 -
6 Grand Allegro 82 62 72 -10 7.0 -
7 Count William - 71 66 +5 7.0 -
8 Heemstede - 89 66 +23 7.0 -
9 Amandla Ngawethu - 72 66 +6 7.0 -
10 District Master - 73 66 +7 7.0 -
11 Tripping Thunder - 85 66 +19 7.0 -
12 Greenlight Jet - 44 66 -22 7.0 -
13 World Soprano 64 65 80 -15 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