Official NHA Assessment

Race 5: GOLD CIRCLE RACING YOUTUBE CHANNEL FM 64 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Birdwatcher
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
5 / 9
Within 2 points
Significant Diffs
0 / 9
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    Hatta                4    54.0    1    0.00     2.0   57    45           57    +0
2    Birdwatcher          5    56.5    2    1.40     0.0   57    57           57    +0
3    Rose Princess        4    57.5    3    1.80     2.0   59    55           55    -4
4    Blush Of Dawn        8    59.5    4    2.50     0.0   63    62           62    -1
5    Kileigh's Fate       4    55.5    5    3.40     2.0   58    49           49    -9
6    Sky Cafe             3    60.0    6    4.30     3.0   64    55           55    -9
7    Whispering Green     4    57.0    7    4.45     2.0   58    51           51    -7
8    Girl Of Tregunter    2    58.5    8    8.25     0.0   68    58           58    -10
99   Top Honours          4    52.0    99   0.00     2.0   -     41           41    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Hatta 57 59 57 +2 2.0 -
2 Birdwatcher Line 57 53 57 -4 0.0
3 Rose Princess 59 53 55 -2 2.0 -
4 Blush Of Dawn 63 64 62 +2 0.0 -
5 Kileigh's Fate 58 48 49 -1 2.0 -
6 Sky Cafe 64 58 55 +3 3.0 -
7 Whispering Green 58 49 51 -2 2.0 -
8 Girl Of Tregunter 68 63 58 +5 0.0 -
99 Top Honours - 45 41 +4 2.0 -
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