Official NHA Assessment

Race 2: TAB TELEBET 0861 000 822 DERBY PLATE (3 year olds)

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Line Horse
Keep It Secret
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 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    You Know Who         3    56.5    1    0.00     3.5   90    88           88    -2
2    Keep It Secret       3    60.0    2    0.25     3.5   95    95           95    +0
3    Peace In Our World   6    58.0    3    1.00     0.0   90    104          104   +14
4    Drengs Ferry         3    56.0    4    2.75     3.5   71    90           90    +19
5    Young Nelson         3    58.0    5    5.00     3.5   71    91           91    +20
6    Sheeba Darling       3    51.0    6    10.50    3.5   59    77           77    +18
99   I Want It All        3    58.0    99   0.00     3.5   -     91           91    +0
99   Prince Vihaan        3    56.0    99   0.00     3.5   -     87           87    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 You Know Who 90 91 88 +3 3.5 -
2 Keep It Secret Line 95 80 95 -15 3.5
3 Peace In Our World 90 89 104 -15 0.0 -
4 Drengs Ferry 71 62 90 -28 3.5 -
5 Young Nelson 71 62 91 -29 3.5 -
6 Sheeba Darling 59 53 77 -24 3.5 -
99 I Want It All - 86 91 -5 3.5 -
99 Prince Vihaan - 89 87 +2 3.5 -
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