Official NHA Assessment

Race 3: TAB TELEBET 0861 000 822 WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Pink Diamond
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
5 / 7
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    Tree Fairy           3    60.0    1    0.00     2.5   50    52           52    +2
2    Pink Diamond         6    60.0    2    1.25     0.0   61    61           61    +0
3    Three Bells          3    60.0    3    1.50     2.5   47    55           55    +8
4    Unyielding           2    60.0    4    4.25     0.0   64    58           58    -6
5    Summer Of Dreams     2    60.0    5    6.00     0.0   58    57           57    -1
6    Elusive Fire         4    60.0    6    13.00    1.0   58    55           55    -3
7    Queen's Gambit       3    60.0    7    22.00    2.5   -     52           52    +52
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tree Fairy 50 54 52 +2 2.5 -
2 Pink Diamond Line 61 60 61 -1 0.0
3 Three Bells 47 43 55 -12 2.5 -
4 Unyielding 64 88 58 +30 0.0 -
5 Summer Of Dreams 58 65 57 +8 0.0 -
6 Elusive Fire 58 63 55 +8 1.0 -
7 Queen's Gambit - 46 52 -6 2.5 -
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