Official NHA Assessment

Race 7: DIYA VALVES B STAKES (For All Horses)

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Line Horse
Donquerari
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
6 / 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    City Of Love         2    51.0    1    0.00     3.0   79    70           70    -9
2    Donquerari           5    57.0    2    1.30     0.0   88    88           88    +0
3    Position Of Power    3    55.5    3    1.60     4.5   85    76           76    -9
4    Circumbendibus       3    58.5    4    2.10     4.5   92    82           82    -10
5    Mar Del Plata        2    50.0    5    3.30     3.0   78    68           68    -10
6    Connery              4    62.0    6    3.80     5.0   99    88           89    -10
7    Captain's Christy    4    59.0    7    4.00     5.0   96    82           86    -10
8    First Origin         2    61.5    8    4.20     3.0   96    91           91    -5
9    Mojo Man             4    55.5    9    6.10     5.0   84    75           75    -9
10   Jet Legacy           5    57.0    10   6.30     0.0   89    88           88    -1
11   Passage Of Power     6    52.5    11   6.55     0.0   81    79           79    -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 City Of Love 79 85 70 +15 3.0 -
2 Donquerari Line 88 86 88 -2 0.0
3 Position Of Power 85 90 76 +14 4.5 -
4 Circumbendibus 92 97 82 +15 4.5 -
5 Mar Del Plata 78 77 68 +9 3.0 -
6 Connery 99 96 89 +7 5.0 -
7 Captain's Christy 96 95 86 +9 5.0 -
8 First Origin 96 91 91 ✓ Match 3.0 -
9 Mojo Man 84 80 75 +5 5.0 -
10 Jet Legacy 89 89 88 +1 0.0 -
11 Passage Of Power 81 76 79 -3 0.0 -
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