Official NHA Assessment

Race 3: KING GEORGE AND QUEEN ELIZABETH DIAMOND STAKES: MTOTO (1988) MAIDEN PLATE (For all Maidens)

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Line Horse
Grey Linngari
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 10
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    Siege Of Orleans     3    52.0    1    0.00     6.0   68    29           29    -39
2    Madiba's Cuppa       3    58.0    2    1.10     6.0   -     47           47    +47
3    Park And Fly         4    56.5    3    7.70     3.0   60    44           50    -10
4    Sexy Shiraz          3    50.5    4    8.30     6.0   66    26           56    -10
5    Grey Linngari        5    60.0    5    8.70     0.0   57    57           57    +0
6    Amble Inn            4    56.5    6    10.10    3.0   58    44           48    -10
7    Django               4    58.5    7    10.90    3.0   30    48           48    +18
8    Red Hot Chili Girl   4    56.5    8    12.30    3.0   53    44           44    -9
9    Edge Of Winter       3    58.0    9    23.50    6.0   67    41           57    -10
10   Beau Vallon          3    58.0    10   99.99    6.0   -     41           41    +41
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Siege Of Orleans 68 52 29 +23 6.0 -
2 Madiba's Cuppa - 63 47 +16 6.0 -
3 Park And Fly 60 58 50 +8 3.0 -
4 Sexy Shiraz 66 57 56 +1 6.0 -
5 Grey Linngari Line 57 50 57 -7 0.0
6 Amble Inn 58 56 48 +8 3.0 -
7 Django 30 58 48 +10 3.0 -
8 Red Hot Chili Girl 53 50 44 +6 3.0 -
9 Edge Of Winter 67 60 57 +3 6.0 -
10 Beau Vallon - 30 41 -11 6.0 -
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