Official NHA Assessment

Race 1: TRACK AND BALL GAMING MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)

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Line Horse
Head Girl
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 8
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    Quentasia            4    60.0    1    0.00     7.0   75    50           50    -25
2    Head Girl            5    60.0    2    1.80     0.0   64    64           64    +0
3    Grecian Palace       2    58.5    3    2.20     4.0   70    53           60    -10
4    Littleblackvelvet    4    56.0    4    3.40     7.0   70    42           60    -10
5    Roys' Daisy          6    60.0    5    14.20    0.0   -     64           64    +64
6    Roy's Oyster         6    60.0    6    20.30    0.0   -     64           64    +64
7    Roy's Trump          4    60.0    7    20.50    7.0   -     50           50    +50
99   Dressedtothenines    4    60.0    99   0.00     7.0   -     50           50    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Quentasia 75 58 50 +8 7.0 -
2 Head Girl Line 64 62 64 -2 0.0
3 Grecian Palace 70 62 60 +2 4.0 -
4 Littleblackvelvet 70 77 60 +17 7.0 -
5 Roys' Daisy - 39 64 -25 0.0 -
6 Roy's Oyster - 20 64 -44 0.0 -
7 Roy's Trump - 10 50 -40 7.0 -
99 Dressedtothenines - 66 50 +16 7.0 -
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