Official NHA Assessment

Race 9: STEPHEN STANWAY CLASSIFIED STAKES (For horses with nett rating of 71 and below)

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Line Horse
Quattro Passi
Reference for assessment
Exact Matches
2 / 13
Calculated = Official
Close Matches
5 / 13
Within 2 points
Significant Diffs
5 / 13
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    Little Rain          5    50.5    1    0.00     0.0   55    48           48    -7
2    Jp Two Thousand      3    56.0    2    2.00     2.0   74    58           64    -10
3    Follow My Path       5    54.5    3    2.50     0.0   54    58           58    +4
4    Back To Basics       3    56.0    4    3.00     2.0   68    57           58    -10
5    Quattro Passi        5    56.0    5    3.50     0.0   60    60           60    +0
6    Tiger In The Sun     4    60.0    6    3.55     1.0   70    66           66    -4
7    Icy Night            3    56.0    7    7.00     2.0   70    55           60    -10
8    Sacred Valley        3    54.0    8    14.25    2.0   65    51           55    -10
99   On The Warpath       3    54.0    99   0.00     2.0   -     51           51    +0
99   Written In Stone     9    60.0    99   0.00     0.0   -     67           67    +0
99   Purple Shadow        4    54.0    99   0.00     1.0   -     53           53    +0
99   Invisible            5    58.0    99   0.00     0.0   -     63           63    +0
99   Rose Willow          4    50.5    99   0.00     1.0   -     46           46    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Little Rain 55 59 48 +11 0.0 -
2 Jp Two Thousand 74 61 64 -3 2.0 -
3 Follow My Path 54 54 58 -4 0.0 -
4 Back To Basics 68 72 58 +14 2.0 -
5 Quattro Passi Line 60 62 60 +2 0.0
6 Tiger In The Sun 70 66 66 ✓ Match 1.0 -
7 Icy Night 70 70 60 +10 2.0 -
8 Sacred Valley 65 44 55 -11 2.0 -
99 On The Warpath - 50 51 -1 2.0 -
99 Written In Stone - 67 67 ✓ Match 0.0 -
99 Purple Shadow - 62 53 +9 1.0 -
99 Invisible - 68 63 +5 0.0 -
99 Rose Willow - 48 46 +2 1.0 -
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