Official NHA Assessment

Race 6: GUINEAS DAY 5 FEBRUARY PROGRESS PLATE (For 1,2 & 3 Time Winners & Maidens)

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Line Horse
Reunion
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 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    Reunion              4    60.0    1    0.00     2.5   99    99           99    +0
2    Motown Magic         3    55.0    2    3.00     5.0   85    86           86    +1
3    Bold Jazz            4    59.5    3    11.50    2.5   93    98           98    +5
4    Sister Light         3    51.5    4    12.25    5.0   85    77           77    -8
5    My Master            3    55.0    5    18.50    5.0   85    84           84    -1
6    Snorting Bull        7    55.0    6    99.99    0.0   75    94           94    +19
99   Fifth Of July        5    61.0    99   0.00     0.0   -     106          106   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Reunion Line 99 100 99 +1 2.5
2 Motown Magic 85 75 86 -11 5.0 -
3 Bold Jazz 93 83 98 -15 2.5 -
4 Sister Light 85 96 77 +19 5.0 -
5 My Master 85 57 84 -27 5.0 -
6 Snorting Bull 75 75 94 -19 0.0 -
99 Fifth Of July - 63 106 -43 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