Official NHA Assessment

Race 8: NEXT FAIRVIEW RACEMEETING TUESDAY 15 MARCH MR 68 HANDICAP (Open)

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Line Horse
Jet Mirage
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
0 / 13
Within 2 points
Significant Diffs
12 / 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    Paris Opera          4    60.5    1    0.00     4.0   69    78           69    +0
2    Great Guy            5    54.5    2    0.25     0.0   57    74           74    +17
3    Jet Mirage           3    59.0    3    1.00     3.5   76    76           76    +0
4    The Sands            6    56.0    4    1.10     0.0   59    77           77    +18
5    Timkat               7    58.0    5    1.85     0.0   64    81           81    +17
6    Sonny Quinn          4    58.5    6    3.10     4.0   65    74           74    +9
7    Winter Vacation      4    56.5    7    3.60     4.0   61    70           70    +9
8    Chloris              4    61.5    8    4.85     4.0   71    80           80    +9
9    Guaquistador         4    52.0    9    5.35     4.0   50    61           61    +11
10   Shield Maiden        3    57.0    10   10.35    3.5   67    72           72    +5
11   Africanroyaljewel    4    56.5    11   12.10    4.0   61    70           70    +9
12   Tuk Tuk              3    55.5    12   99.99    3.5   64    69           69    +5
99   Sovereign Supreme    4    56.5    99   0.00     4.0   -     70           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Paris Opera 69 66 69 -3 4.0 -
2 Great Guy 57 54 74 -20 0.0 -
3 Jet Mirage Line 76 100 76 +24 3.5
4 The Sands 59 50 77 -27 0.0 -
5 Timkat 64 58 81 -23 0.0 -
6 Sonny Quinn 65 60 74 -14 4.0 -
7 Winter Vacation 61 55 70 -15 4.0 -
8 Chloris 71 73 80 -7 4.0 -
9 Guaquistador 50 47 61 -14 4.0 -
10 Shield Maiden 67 63 72 -9 3.5 -
11 Africanroyaljewel 61 56 70 -14 4.0 -
12 Tuk Tuk 64 61 69 -8 3.5 -
99 Sovereign Supreme - 61 70 -9 4.0 -
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