Official NHA Assessment

Race 5: DERBY TRIAL (Listed) (For 3 year-olds)

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Line Horse
My Master
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
10 / 11
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    Litigation           3    60.0    1    0.00     4.5   91    88           88    -3
2    Tabebuia             3    57.0    2    3.50     4.5   81    85           85    +4
3    My Master            3    57.0    3    4.00     4.5   84    84           84    +0
4    With Pleasure        3    55.5    4    4.75     4.5   79    79           79    +0
5    Leshawes             3    55.5    5    5.75     4.5   74    79           79    +5
6    Rule Book            6    55.5    6    7.00     0.0   71    88           88    +17
7    Pewter Sky           3    55.5    7    7.25     4.5   72    79           79    +7
8    Flashy Apache        6    58.5    8    12.00    0.0   86    94           94    +8
9    Just A Memory        3    55.5    9    37.00    4.5   74    79           79    +5
99   Run As One           3    60.0    99   0.00     4.5   -     88           88    +0
99   Motown Magic         3    60.0    99   0.00     4.5   -     88           88    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Litigation 91 113 88 +25 4.5 -
2 Tabebuia 81 94 85 +9 4.5 -
3 My Master Line 84 57 84 -27 4.5
4 With Pleasure 79 97 79 +18 4.5 -
5 Leshawes 74 73 79 -6 4.5 -
6 Rule Book 71 92 88 +4 0.0 -
7 Pewter Sky 72 71 79 -8 4.5 -
8 Flashy Apache 86 78 94 -16 0.0 -
9 Just A Memory 74 67 79 -12 4.5 -
99 Run As One - 79 88 -9 4.5 -
99 Motown Magic - 75 88 -13 4.5 -
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